/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-channel-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 03:58:26,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 03:58:26,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 03:58:26,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 03:58:26,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 03:58:26,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 03:58:26,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 03:58:26,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 03:58:26,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 03:58:26,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 03:58:26,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 03:58:26,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 03:58:26,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 03:58:26,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 03:58:26,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 03:58:26,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 03:58:26,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 03:58:26,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 03:58:26,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 03:58:26,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 03:58:26,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 03:58:26,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 03:58:26,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 03:58:26,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 03:58:26,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 03:58:26,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 03:58:26,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 03:58:26,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 03:58:26,887 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 03:58:26,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 03:58:26,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 03:58:26,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 03:58:26,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 03:58:26,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 03:58:26,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 03:58:26,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 03:58:26,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 03:58:26,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 03:58:26,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 03:58:26,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 03:58:26,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 03:58:26,891 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 03:58:26,911 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 03:58:26,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 03:58:26,911 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 03:58:26,912 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 03:58:26,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 03:58:26,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 03:58:26,913 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 03:58:26,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 03:58:26,913 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 03:58:26,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 03:58:26,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 03:58:26,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 03:58:26,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 03:58:26,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 03:58:26,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 03:58:26,914 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 03:58:26,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 03:58:26,914 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 03:58:26,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 03:58:26,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 03:58:26,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 03:58:26,914 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 03:58:26,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 03:58:26,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:58:26,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 03:58:26,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 03:58:26,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 03:58:26,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 03:58:26,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 03:58:26,915 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 03:58:26,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 03:58:26,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 03:58:27,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 03:58:27,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 03:58:27,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 03:58:27,108 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 03:58:27,109 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 03:58:27,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-01-28 03:58:27,989 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 03:58:28,130 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 03:58:28,131 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-01-28 03:58:28,135 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4b3a81a/1bf92857df924200b07cd466b944e413/FLAG0b3476eef [2023-01-28 03:58:28,145 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4b3a81a/1bf92857df924200b07cd466b944e413 [2023-01-28 03:58:28,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 03:58:28,147 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 03:58:28,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 03:58:28,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 03:58:28,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 03:58:28,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:58:28" (1/1) ... [2023-01-28 03:58:28,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c74fe28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:58:28, skipping insertion in model container [2023-01-28 03:58:28,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:58:28" (1/1) ... [2023-01-28 03:58:28,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 03:58:28,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 03:58:28,310 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-channel-sum.wvr.c[2947,2960] [2023-01-28 03:58:28,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:58:28,327 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 03:58:28,348 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-channel-sum.wvr.c[2947,2960] [2023-01-28 03:58:28,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:58:28,355 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 03:58:28,355 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 03:58:28,360 INFO L208 MainTranslator]: Completed translation [2023-01-28 03:58:28,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:58:28 WrapperNode [2023-01-28 03:58:28,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 03:58:28,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 03:58:28,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 03:58:28,362 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 03:58:28,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:58:28" (1/1) ... [2023-01-28 03:58:28,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:58:28" (1/1) ... [2023-01-28 03:58:28,384 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 155 [2023-01-28 03:58:28,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 03:58:28,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 03:58:28,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 03:58:28,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 03:58:28,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:58:28" (1/1) ... [2023-01-28 03:58:28,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:58:28" (1/1) ... [2023-01-28 03:58:28,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:58:28" (1/1) ... [2023-01-28 03:58:28,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:58:28" (1/1) ... [2023-01-28 03:58:28,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:58:28" (1/1) ... [2023-01-28 03:58:28,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:58:28" (1/1) ... [2023-01-28 03:58:28,400 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:58:28" (1/1) ... [2023-01-28 03:58:28,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:58:28" (1/1) ... [2023-01-28 03:58:28,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 03:58:28,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 03:58:28,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 03:58:28,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 03:58:28,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:58:28" (1/1) ... [2023-01-28 03:58:28,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:58:28,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:58:28,424 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 03:58:28,434 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 03:58:28,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 03:58:28,483 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 03:58:28,483 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 03:58:28,483 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 03:58:28,483 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 03:58:28,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 03:58:28,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 03:58:28,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 03:58:28,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 03:58:28,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 03:58:28,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 03:58:28,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 03:58:28,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 03:58:28,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 03:58:28,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 03:58:28,485 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 03:58:28,573 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 03:58:28,574 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 03:58:28,835 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 03:58:28,877 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 03:58:28,877 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 03:58:28,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:58:28 BoogieIcfgContainer [2023-01-28 03:58:28,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 03:58:28,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 03:58:28,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 03:58:28,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 03:58:28,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 03:58:28" (1/3) ... [2023-01-28 03:58:28,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7485bd95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:58:28, skipping insertion in model container [2023-01-28 03:58:28,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:58:28" (2/3) ... [2023-01-28 03:58:28,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7485bd95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:58:28, skipping insertion in model container [2023-01-28 03:58:28,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:58:28" (3/3) ... [2023-01-28 03:58:28,883 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-01-28 03:58:28,894 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 03:58:28,894 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 03:58:28,894 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 03:58:28,939 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 03:58:28,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 135 transitions, 286 flow [2023-01-28 03:58:28,995 INFO L130 PetriNetUnfolder]: 11/133 cut-off events. [2023-01-28 03:58:28,995 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 03:58:28,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 133 events. 11/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-01-28 03:58:28,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 135 transitions, 286 flow [2023-01-28 03:58:29,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 125 transitions, 262 flow [2023-01-28 03:58:29,003 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 03:58:29,009 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 125 transitions, 262 flow [2023-01-28 03:58:29,010 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 125 transitions, 262 flow [2023-01-28 03:58:29,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 125 transitions, 262 flow [2023-01-28 03:58:29,030 INFO L130 PetriNetUnfolder]: 11/125 cut-off events. [2023-01-28 03:58:29,031 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 03:58:29,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 11/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-01-28 03:58:29,032 INFO L119 LiptonReduction]: Number of co-enabled transitions 1296 [2023-01-28 03:58:32,338 INFO L134 LiptonReduction]: Checked pairs total: 1508 [2023-01-28 03:58:32,338 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-01-28 03:58:32,348 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 03:58:32,352 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;@43a33b5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 03:58:32,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 03:58:32,357 INFO L130 PetriNetUnfolder]: 4/18 cut-off events. [2023-01-28 03:58:32,357 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 03:58:32,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:58:32,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:58:32,358 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 03:58:32,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:58:32,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1385195944, now seen corresponding path program 1 times [2023-01-28 03:58:32,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:58:32,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217012566] [2023-01-28 03:58:32,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:58:32,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:58:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:58:32,655 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 03:58:32,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:58:32,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217012566] [2023-01-28 03:58:32,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217012566] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:58:32,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:58:32,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 03:58:32,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764880610] [2023-01-28 03:58:32,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:58:32,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 03:58:32,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:58:32,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 03:58:32,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 03:58:32,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 267 [2023-01-28 03:58:32,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:32,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:58:32,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 267 [2023-01-28 03:58:32,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:58:32,753 INFO L130 PetriNetUnfolder]: 87/153 cut-off events. [2023-01-28 03:58:32,753 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 03:58:32,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 153 events. 87/153 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 486 event pairs, 21 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 244. Up to 87 conditions per place. [2023-01-28 03:58:32,756 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 21 selfloop transitions, 2 changer transitions 4/29 dead transitions. [2023-01-28 03:58:32,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 133 flow [2023-01-28 03:58:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 03:58:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 03:58:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-01-28 03:58:32,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681647940074906 [2023-01-28 03:58:32,771 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-01-28 03:58:32,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-01-28 03:58:32,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:58:32,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-01-28 03:58:32,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:32,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:32,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:32,784 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 375 transitions. [2023-01-28 03:58:32,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 133 flow [2023-01-28 03:58:32,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 03:58:32,787 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 52 flow [2023-01-28 03:58:32,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2023-01-28 03:58:32,791 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-01-28 03:58:32,792 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 52 flow [2023-01-28 03:58:32,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:32,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:58:32,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:58:32,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 03:58:32,793 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 03:58:32,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:58:32,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1301726337, now seen corresponding path program 1 times [2023-01-28 03:58:32,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:58:32,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968473308] [2023-01-28 03:58:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:58:32,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:58:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:58:32,979 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 03:58:32,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:58:32,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968473308] [2023-01-28 03:58:32,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968473308] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:58:32,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:58:32,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 03:58:33,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393745679] [2023-01-28 03:58:33,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:58:33,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 03:58:33,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:58:33,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 03:58:33,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 03:58:33,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 267 [2023-01-28 03:58:33,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:33,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:58:33,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 267 [2023-01-28 03:58:33,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:58:33,097 INFO L130 PetriNetUnfolder]: 74/139 cut-off events. [2023-01-28 03:58:33,097 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 03:58:33,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 139 events. 74/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 381 event pairs, 11 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 191. Up to 98 conditions per place. [2023-01-28 03:58:33,098 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 21 selfloop transitions, 4 changer transitions 6/32 dead transitions. [2023-01-28 03:58:33,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 32 transitions, 143 flow [2023-01-28 03:58:33,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 03:58:33,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 03:58:33,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 455 transitions. [2023-01-28 03:58:33,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42602996254681647 [2023-01-28 03:58:33,100 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 455 transitions. [2023-01-28 03:58:33,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 455 transitions. [2023-01-28 03:58:33,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:58:33,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 455 transitions. [2023-01-28 03:58:33,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:33,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:33,104 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:33,104 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 52 flow. Second operand 4 states and 455 transitions. [2023-01-28 03:58:33,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 32 transitions, 143 flow [2023-01-28 03:58:33,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 03:58:33,106 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 75 flow [2023-01-28 03:58:33,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=75, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2023-01-28 03:58:33,106 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-01-28 03:58:33,106 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 75 flow [2023-01-28 03:58:33,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:33,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:58:33,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:58:33,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 03:58:33,107 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 03:58:33,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:58:33,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1080410029, now seen corresponding path program 1 times [2023-01-28 03:58:33,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:58:33,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283271610] [2023-01-28 03:58:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:58:33,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:58:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:58:33,201 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 03:58:33,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:58:33,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283271610] [2023-01-28 03:58:33,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283271610] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:58:33,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:58:33,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 03:58:33,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460025590] [2023-01-28 03:58:33,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:58:33,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 03:58:33,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:58:33,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 03:58:33,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 03:58:33,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 267 [2023-01-28 03:58:33,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:33,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:58:33,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 267 [2023-01-28 03:58:33,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:58:33,256 INFO L130 PetriNetUnfolder]: 74/157 cut-off events. [2023-01-28 03:58:33,256 INFO L131 PetriNetUnfolder]: For 37/46 co-relation queries the response was YES. [2023-01-28 03:58:33,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 157 events. 74/157 cut-off events. For 37/46 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 523 event pairs, 50 based on Foata normal form. 14/166 useless extension candidates. Maximal degree in co-relation 269. Up to 123 conditions per place. [2023-01-28 03:58:33,260 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 18 selfloop transitions, 2 changer transitions 10/33 dead transitions. [2023-01-28 03:58:33,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 161 flow [2023-01-28 03:58:33,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 03:58:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 03:58:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 440 transitions. [2023-01-28 03:58:33,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41198501872659177 [2023-01-28 03:58:33,261 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 440 transitions. [2023-01-28 03:58:33,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 440 transitions. [2023-01-28 03:58:33,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:58:33,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 440 transitions. [2023-01-28 03:58:33,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:33,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:33,264 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:33,264 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 75 flow. Second operand 4 states and 440 transitions. [2023-01-28 03:58:33,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 161 flow [2023-01-28 03:58:33,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 161 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 03:58:33,266 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 91 flow [2023-01-28 03:58:33,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-01-28 03:58:33,267 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 8 predicate places. [2023-01-28 03:58:33,269 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 91 flow [2023-01-28 03:58:33,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:33,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:58:33,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:58:33,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 03:58:33,270 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 03:58:33,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:58:33,270 INFO L85 PathProgramCache]: Analyzing trace with hash -350690420, now seen corresponding path program 1 times [2023-01-28 03:58:33,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:58:33,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101212859] [2023-01-28 03:58:33,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:58:33,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:58:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:58:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:58:33,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:58:33,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101212859] [2023-01-28 03:58:33,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101212859] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:58:33,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657127008] [2023-01-28 03:58:33,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:58:33,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:58:33,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:58:33,429 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 03:58:33,460 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 03:58:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:58:33,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 03:58:33,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:58:33,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 116 [2023-01-28 03:58:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:58:33,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:58:34,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2023-01-28 03:58:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:58:34,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657127008] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:58:34,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:58:34,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 10 [2023-01-28 03:58:34,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108887355] [2023-01-28 03:58:34,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:58:34,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 03:58:34,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:58:34,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 03:58:34,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-01-28 03:58:34,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 267 [2023-01-28 03:58:34,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 91 flow. Second operand has 11 states, 11 states have (on average 109.72727272727273) internal successors, (1207), 11 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:34,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:58:34,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 267 [2023-01-28 03:58:34,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:58:34,187 INFO L130 PetriNetUnfolder]: 98/190 cut-off events. [2023-01-28 03:58:34,188 INFO L131 PetriNetUnfolder]: For 70/73 co-relation queries the response was YES. [2023-01-28 03:58:34,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 190 events. 98/190 cut-off events. For 70/73 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 596 event pairs, 9 based on Foata normal form. 10/197 useless extension candidates. Maximal degree in co-relation 468. Up to 39 conditions per place. [2023-01-28 03:58:34,189 INFO L137 encePairwiseOnDemand]: 261/267 looper letters, 21 selfloop transitions, 6 changer transitions 25/53 dead transitions. [2023-01-28 03:58:34,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 270 flow [2023-01-28 03:58:34,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 03:58:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 03:58:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 900 transitions. [2023-01-28 03:58:34,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42134831460674155 [2023-01-28 03:58:34,191 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 900 transitions. [2023-01-28 03:58:34,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 900 transitions. [2023-01-28 03:58:34,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:58:34,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 900 transitions. [2023-01-28 03:58:34,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.5) internal successors, (900), 8 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:34,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:34,196 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:34,196 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 91 flow. Second operand 8 states and 900 transitions. [2023-01-28 03:58:34,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 270 flow [2023-01-28 03:58:34,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 262 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-28 03:58:34,197 INFO L231 Difference]: Finished difference. Result has 35 places, 21 transitions, 86 flow [2023-01-28 03:58:34,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=21} [2023-01-28 03:58:34,198 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-01-28 03:58:34,198 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 21 transitions, 86 flow [2023-01-28 03:58:34,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 109.72727272727273) internal successors, (1207), 11 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:34,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:58:34,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:58:34,208 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 03:58:34,404 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 03:58:34,404 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 03:58:34,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:58:34,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1764708894, now seen corresponding path program 2 times [2023-01-28 03:58:34,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:58:34,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93526993] [2023-01-28 03:58:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:58:34,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:58:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:58:35,022 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 03:58:35,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:58:35,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93526993] [2023-01-28 03:58:35,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93526993] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:58:35,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982137247] [2023-01-28 03:58:35,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:58:35,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:58:35,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:58:35,024 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 03:58:35,027 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 03:58:35,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:58:35,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:58:35,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-28 03:58:35,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:58:35,150 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 03:58:35,181 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 03:58:35,218 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 03:58:35,379 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 03:58:35,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:58:35,938 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse1 (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_102 (Array Int Int)) (v_ArrVal_103 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_102) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_103) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= (+ (select .cse0 .cse1) c_~sum~0) 1) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_102 (Array Int Int)) (v_ArrVal_103 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_102) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_103) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= 0 (+ (select .cse3 .cse1) c_~sum~0)) (not (= (select .cse3 .cse2) 1))))))) (<= c_~n~0 c_~back~0) (<= (+ c_~back~0 1) c_~front~0) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0)) is different from false [2023-01-28 03:58:35,968 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:58:35,968 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 62 treesize of output 50 [2023-01-28 03:58:35,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:58:35,976 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 148 treesize of output 140 [2023-01-28 03:58:35,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:58:35,984 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 132 treesize of output 116 [2023-01-28 03:58:35,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:58:35,993 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 83 treesize of output 79 [2023-01-28 03:58:36,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:58:36,244 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 62 treesize of output 50 [2023-01-28 03:58:36,252 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 03:58:36,252 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 316 treesize of output 288 [2023-01-28 03:58:36,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:58:36,272 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 84 [2023-01-28 03:58:36,285 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 03:58:36,285 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 95 treesize of output 75 [2023-01-28 03:58:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-01-28 03:58:36,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982137247] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:58:36,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:58:36,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-01-28 03:58:36,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578678673] [2023-01-28 03:58:36,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:58:36,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 03:58:36,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:58:36,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 03:58:36,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=526, Unknown=2, NotChecked=48, Total=702 [2023-01-28 03:58:36,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-01-28 03:58:36,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 21 transitions, 86 flow. Second operand has 27 states, 27 states have (on average 67.81481481481481) internal successors, (1831), 27 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:36,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:58:36,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-01-28 03:58:36,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:58:43,074 WARN L222 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 55 DAG size of output: 47 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 03:58:49,292 WARN L222 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 57 DAG size of output: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 03:58:55,746 WARN L222 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 61 DAG size of output: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 03:58:56,938 INFO L130 PetriNetUnfolder]: 375/677 cut-off events. [2023-01-28 03:58:56,939 INFO L131 PetriNetUnfolder]: For 438/438 co-relation queries the response was YES. [2023-01-28 03:58:56,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2009 conditions, 677 events. 375/677 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2943 event pairs, 12 based on Foata normal form. 17/690 useless extension candidates. Maximal degree in co-relation 1249. Up to 140 conditions per place. [2023-01-28 03:58:56,942 INFO L137 encePairwiseOnDemand]: 256/267 looper letters, 113 selfloop transitions, 65 changer transitions 43/221 dead transitions. [2023-01-28 03:58:56,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 221 transitions, 1263 flow [2023-01-28 03:58:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-01-28 03:58:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-01-28 03:58:56,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3263 transitions. [2023-01-28 03:58:56,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26567334310372903 [2023-01-28 03:58:56,948 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3263 transitions. [2023-01-28 03:58:56,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3263 transitions. [2023-01-28 03:58:56,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:58:56,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3263 transitions. [2023-01-28 03:58:56,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 70.93478260869566) internal successors, (3263), 46 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:56,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 267.0) internal successors, (12549), 47 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:56,964 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 267.0) internal successors, (12549), 47 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:56,965 INFO L175 Difference]: Start difference. First operand has 35 places, 21 transitions, 86 flow. Second operand 46 states and 3263 transitions. [2023-01-28 03:58:56,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 221 transitions, 1263 flow [2023-01-28 03:58:56,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 221 transitions, 1077 flow, removed 48 selfloop flow, removed 5 redundant places. [2023-01-28 03:58:56,969 INFO L231 Difference]: Finished difference. Result has 80 places, 99 transitions, 561 flow [2023-01-28 03:58:56,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=561, PETRI_PLACES=80, PETRI_TRANSITIONS=99} [2023-01-28 03:58:56,970 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 58 predicate places. [2023-01-28 03:58:56,970 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 99 transitions, 561 flow [2023-01-28 03:58:56,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 67.81481481481481) internal successors, (1831), 27 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:56,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:58:56,971 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:58:56,978 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 03:58:57,176 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 03:58:57,181 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 03:58:57,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:58:57,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1161701845, now seen corresponding path program 3 times [2023-01-28 03:58:57,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:58:57,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560830013] [2023-01-28 03:58:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:58:57,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:58:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:58:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:58:57,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:58:57,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560830013] [2023-01-28 03:58:57,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560830013] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:58:57,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872057457] [2023-01-28 03:58:57,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:58:57,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:58:57,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:58:57,326 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 03:58:57,328 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 03:58:57,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 03:58:57,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:58:57,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 03:58:57,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:58:57,462 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:58:57,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 9 [2023-01-28 03:58:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:58:57,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:58:57,844 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 03:58:57,844 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 231 treesize of output 183 [2023-01-28 03:58:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:58:57,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872057457] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:58:57,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:58:57,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2023-01-28 03:58:57,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720915111] [2023-01-28 03:58:57,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:58:57,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 03:58:57,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:58:57,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 03:58:57,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-01-28 03:58:57,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 267 [2023-01-28 03:58:58,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 99 transitions, 561 flow. Second operand has 17 states, 17 states have (on average 92.88235294117646) internal successors, (1579), 17 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 03:58:58,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:58:58,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 267 [2023-01-28 03:58:58,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:58:58,650 INFO L130 PetriNetUnfolder]: 855/1488 cut-off events. [2023-01-28 03:58:58,651 INFO L131 PetriNetUnfolder]: For 792/792 co-relation queries the response was YES. [2023-01-28 03:58:58,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4611 conditions, 1488 events. 855/1488 cut-off events. For 792/792 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7401 event pairs, 26 based on Foata normal form. 0/1446 useless extension candidates. Maximal degree in co-relation 4515. Up to 302 conditions per place. [2023-01-28 03:58:58,658 INFO L137 encePairwiseOnDemand]: 260/267 looper letters, 163 selfloop transitions, 188 changer transitions 1/352 dead transitions. [2023-01-28 03:58:58,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 352 transitions, 2457 flow [2023-01-28 03:58:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 03:58:58,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 03:58:58,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3153 transitions. [2023-01-28 03:58:58,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3578481443649983 [2023-01-28 03:58:58,663 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3153 transitions. [2023-01-28 03:58:58,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3153 transitions. [2023-01-28 03:58:58,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:58:58,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3153 transitions. [2023-01-28 03:58:58,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 95.54545454545455) internal successors, (3153), 33 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:58,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:58,677 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:58,677 INFO L175 Difference]: Start difference. First operand has 80 places, 99 transitions, 561 flow. Second operand 33 states and 3153 transitions. [2023-01-28 03:58:58,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 352 transitions, 2457 flow [2023-01-28 03:58:58,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 352 transitions, 2080 flow, removed 182 selfloop flow, removed 7 redundant places. [2023-01-28 03:58:58,686 INFO L231 Difference]: Finished difference. Result has 109 places, 253 transitions, 1649 flow [2023-01-28 03:58:58,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1649, PETRI_PLACES=109, PETRI_TRANSITIONS=253} [2023-01-28 03:58:58,687 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 87 predicate places. [2023-01-28 03:58:58,687 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 253 transitions, 1649 flow [2023-01-28 03:58:58,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 92.88235294117646) internal successors, (1579), 17 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 03:58:58,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:58:58,688 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:58:58,692 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 03:58:58,892 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 03:58:58,893 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 03:58:58,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:58:58,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1509252043, now seen corresponding path program 4 times [2023-01-28 03:58:58,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:58:58,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080939627] [2023-01-28 03:58:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:58:58,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:58:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:58:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 03:58:59,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:58:59,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080939627] [2023-01-28 03:58:59,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080939627] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:58:59,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128634083] [2023-01-28 03:58:59,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:58:59,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:58:59,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:58:59,016 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 03:58:59,018 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 03:58:59,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:58:59,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:58:59,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 03:58:59,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:58:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 03:58:59,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:58:59,453 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 03:58:59,453 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 211 treesize of output 163 [2023-01-28 03:58:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 03:58:59,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128634083] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:58:59,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:58:59,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-28 03:58:59,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476728891] [2023-01-28 03:58:59,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:58:59,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 03:58:59,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:58:59,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 03:58:59,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-28 03:58:59,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 267 [2023-01-28 03:58:59,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 253 transitions, 1649 flow. Second operand has 12 states, 12 states have (on average 88.41666666666667) internal successors, (1061), 12 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:59,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:58:59,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 267 [2023-01-28 03:58:59,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:58:59,680 INFO L130 PetriNetUnfolder]: 553/996 cut-off events. [2023-01-28 03:58:59,680 INFO L131 PetriNetUnfolder]: For 529/529 co-relation queries the response was YES. [2023-01-28 03:58:59,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 996 events. 553/996 cut-off events. For 529/529 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4514 event pairs, 286 based on Foata normal form. 22/989 useless extension candidates. Maximal degree in co-relation 3301. Up to 894 conditions per place. [2023-01-28 03:58:59,685 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 176 selfloop transitions, 5 changer transitions 1/182 dead transitions. [2023-01-28 03:58:59,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 182 transitions, 1507 flow [2023-01-28 03:58:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 03:58:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 03:58:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 555 transitions. [2023-01-28 03:58:59,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3464419475655431 [2023-01-28 03:58:59,687 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 555 transitions. [2023-01-28 03:58:59,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 555 transitions. [2023-01-28 03:58:59,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:58:59,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 555 transitions. [2023-01-28 03:58:59,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.5) internal successors, (555), 6 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:59,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 267.0) internal successors, (1869), 7 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:59,691 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 267.0) internal successors, (1869), 7 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:59,691 INFO L175 Difference]: Start difference. First operand has 109 places, 253 transitions, 1649 flow. Second operand 6 states and 555 transitions. [2023-01-28 03:58:59,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 182 transitions, 1507 flow [2023-01-28 03:58:59,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 182 transitions, 1354 flow, removed 50 selfloop flow, removed 10 redundant places. [2023-01-28 03:58:59,699 INFO L231 Difference]: Finished difference. Result has 90 places, 171 transitions, 970 flow [2023-01-28 03:58:59,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=970, PETRI_PLACES=90, PETRI_TRANSITIONS=171} [2023-01-28 03:58:59,700 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 68 predicate places. [2023-01-28 03:58:59,700 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 171 transitions, 970 flow [2023-01-28 03:58:59,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.41666666666667) internal successors, (1061), 12 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:59,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:58:59,700 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:58:59,705 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 03:58:59,905 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 03:58:59,905 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 03:58:59,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:58:59,906 INFO L85 PathProgramCache]: Analyzing trace with hash 655996225, now seen corresponding path program 5 times [2023-01-28 03:58:59,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:58:59,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788039048] [2023-01-28 03:58:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:58:59,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:58:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:59:00,753 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 03:59:00,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:59:00,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788039048] [2023-01-28 03:59:00,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788039048] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:59:00,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360355364] [2023-01-28 03:59:00,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 03:59:00,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:59:00,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:59:00,755 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 03:59:00,757 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 03:59:00,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 03:59:00,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:59:00,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-28 03:59:00,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:59:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:59:01,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:59:01,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:59:01,308 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 186 treesize of output 146 [2023-01-28 03:59:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 03:59:01,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360355364] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:59:01,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:59:01,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 23 [2023-01-28 03:59:01,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931158188] [2023-01-28 03:59:01,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:59:01,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 03:59:01,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:59:01,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 03:59:01,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2023-01-28 03:59:01,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 267 [2023-01-28 03:59:01,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 171 transitions, 970 flow. Second operand has 25 states, 25 states have (on average 75.16) internal successors, (1879), 25 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:01,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:59:01,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 267 [2023-01-28 03:59:01,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:59:02,704 INFO L130 PetriNetUnfolder]: 1047/1843 cut-off events. [2023-01-28 03:59:02,704 INFO L131 PetriNetUnfolder]: For 660/660 co-relation queries the response was YES. [2023-01-28 03:59:02,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5783 conditions, 1843 events. 1047/1843 cut-off events. For 660/660 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9631 event pairs, 39 based on Foata normal form. 7/1788 useless extension candidates. Maximal degree in co-relation 5456. Up to 461 conditions per place. [2023-01-28 03:59:02,712 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 243 selfloop transitions, 133 changer transitions 28/404 dead transitions. [2023-01-28 03:59:02,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 404 transitions, 2874 flow [2023-01-28 03:59:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 03:59:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 03:59:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2874 transitions. [2023-01-28 03:59:02,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29092013361676283 [2023-01-28 03:59:02,718 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2874 transitions. [2023-01-28 03:59:02,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2874 transitions. [2023-01-28 03:59:02,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:59:02,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2874 transitions. [2023-01-28 03:59:02,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 77.67567567567568) internal successors, (2874), 37 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:02,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:02,732 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:02,732 INFO L175 Difference]: Start difference. First operand has 90 places, 171 transitions, 970 flow. Second operand 37 states and 2874 transitions. [2023-01-28 03:59:02,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 404 transitions, 2874 flow [2023-01-28 03:59:02,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 404 transitions, 2865 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 03:59:02,742 INFO L231 Difference]: Finished difference. Result has 131 places, 246 transitions, 1858 flow [2023-01-28 03:59:02,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1858, PETRI_PLACES=131, PETRI_TRANSITIONS=246} [2023-01-28 03:59:02,744 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 109 predicate places. [2023-01-28 03:59:02,744 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 246 transitions, 1858 flow [2023-01-28 03:59:02,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 75.16) internal successors, (1879), 25 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:02,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:59:02,745 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:59:02,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-28 03:59:02,949 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 03:59:02,949 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 03:59:02,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:59:02,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1631762424, now seen corresponding path program 6 times [2023-01-28 03:59:02,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:59:02,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996433895] [2023-01-28 03:59:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:59:02,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:59:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:59:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:59:03,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:59:03,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996433895] [2023-01-28 03:59:03,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996433895] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:59:03,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525841187] [2023-01-28 03:59:03,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:59:03,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:59:03,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:59:03,056 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 03:59:03,058 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 03:59:03,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 03:59:03,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:59:03,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 03:59:03,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:59:03,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 116 [2023-01-28 03:59:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 03:59:03,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:59:03,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2023-01-28 03:59:03,502 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 03:59:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 03:59:03,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525841187] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:59:03,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:59:03,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-01-28 03:59:03,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074794573] [2023-01-28 03:59:03,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:59:03,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 03:59:03,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:59:03,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 03:59:03,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-01-28 03:59:03,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 267 [2023-01-28 03:59:03,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 246 transitions, 1858 flow. Second operand has 15 states, 15 states have (on average 95.06666666666666) internal successors, (1426), 15 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:03,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:59:03,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 267 [2023-01-28 03:59:03,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:59:03,883 INFO L130 PetriNetUnfolder]: 922/1624 cut-off events. [2023-01-28 03:59:03,883 INFO L131 PetriNetUnfolder]: For 1498/1498 co-relation queries the response was YES. [2023-01-28 03:59:03,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5896 conditions, 1624 events. 922/1624 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8154 event pairs, 159 based on Foata normal form. 20/1636 useless extension candidates. Maximal degree in co-relation 4971. Up to 1339 conditions per place. [2023-01-28 03:59:03,890 INFO L137 encePairwiseOnDemand]: 261/267 looper letters, 207 selfloop transitions, 33 changer transitions 16/260 dead transitions. [2023-01-28 03:59:03,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 260 transitions, 2344 flow [2023-01-28 03:59:03,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 03:59:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 03:59:03,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 977 transitions. [2023-01-28 03:59:03,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3659176029962547 [2023-01-28 03:59:03,892 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 977 transitions. [2023-01-28 03:59:03,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 977 transitions. [2023-01-28 03:59:03,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:59:03,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 977 transitions. [2023-01-28 03:59:03,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.7) internal successors, (977), 10 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:03,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:03,905 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:03,905 INFO L175 Difference]: Start difference. First operand has 131 places, 246 transitions, 1858 flow. Second operand 10 states and 977 transitions. [2023-01-28 03:59:03,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 260 transitions, 2344 flow [2023-01-28 03:59:03,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 260 transitions, 2218 flow, removed 38 selfloop flow, removed 9 redundant places. [2023-01-28 03:59:03,915 INFO L231 Difference]: Finished difference. Result has 129 places, 228 transitions, 1706 flow [2023-01-28 03:59:03,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1706, PETRI_PLACES=129, PETRI_TRANSITIONS=228} [2023-01-28 03:59:03,916 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 107 predicate places. [2023-01-28 03:59:03,916 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 228 transitions, 1706 flow [2023-01-28 03:59:03,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 95.06666666666666) internal successors, (1426), 15 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:03,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:59:03,916 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:59:03,927 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 03:59:04,121 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 03:59:04,122 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 03:59:04,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:59:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash 398771022, now seen corresponding path program 7 times [2023-01-28 03:59:04,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:59:04,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325434621] [2023-01-28 03:59:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:59:04,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:59:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:59:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:59:04,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:59:04,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325434621] [2023-01-28 03:59:04,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325434621] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:59:04,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984351610] [2023-01-28 03:59:04,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 03:59:04,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:59:04,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:59:04,747 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 03:59:04,749 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 03:59:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:59:04,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 03:59:04,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:59:05,100 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-01-28 03:59:05,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 15 [2023-01-28 03:59:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:59:05,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:59:05,657 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-01-28 03:59:05,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 204 [2023-01-28 03:59:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:59:06,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984351610] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:59:06,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:59:06,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 30 [2023-01-28 03:59:06,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927606354] [2023-01-28 03:59:06,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:59:06,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 03:59:06,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:59:06,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 03:59:06,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2023-01-28 03:59:06,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 267 [2023-01-28 03:59:06,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 228 transitions, 1706 flow. Second operand has 32 states, 32 states have (on average 74.90625) internal successors, (2397), 32 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 03:59:06,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:59:06,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 267 [2023-01-28 03:59:06,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:59:08,116 INFO L130 PetriNetUnfolder]: 2207/3813 cut-off events. [2023-01-28 03:59:08,116 INFO L131 PetriNetUnfolder]: For 3501/3501 co-relation queries the response was YES. [2023-01-28 03:59:08,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13509 conditions, 3813 events. 2207/3813 cut-off events. For 3501/3501 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22857 event pairs, 56 based on Foata normal form. 36/3849 useless extension candidates. Maximal degree in co-relation 12496. Up to 1073 conditions per place. [2023-01-28 03:59:08,132 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 319 selfloop transitions, 307 changer transitions 82/708 dead transitions. [2023-01-28 03:59:08,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 708 transitions, 6036 flow [2023-01-28 03:59:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-28 03:59:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-01-28 03:59:08,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3943 transitions. [2023-01-28 03:59:08,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2895645149445546 [2023-01-28 03:59:08,137 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3943 transitions. [2023-01-28 03:59:08,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3943 transitions. [2023-01-28 03:59:08,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:59:08,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3943 transitions. [2023-01-28 03:59:08,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 77.31372549019608) internal successors, (3943), 51 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:08,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 267.0) internal successors, (13884), 52 states have internal predecessors, (13884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:08,152 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 267.0) internal successors, (13884), 52 states have internal predecessors, (13884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:08,153 INFO L175 Difference]: Start difference. First operand has 129 places, 228 transitions, 1706 flow. Second operand 51 states and 3943 transitions. [2023-01-28 03:59:08,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 708 transitions, 6036 flow [2023-01-28 03:59:08,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 708 transitions, 5978 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-01-28 03:59:08,176 INFO L231 Difference]: Finished difference. Result has 183 places, 414 transitions, 4002 flow [2023-01-28 03:59:08,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=4002, PETRI_PLACES=183, PETRI_TRANSITIONS=414} [2023-01-28 03:59:08,177 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 161 predicate places. [2023-01-28 03:59:08,177 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 414 transitions, 4002 flow [2023-01-28 03:59:08,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 74.90625) internal successors, (2397), 32 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 03:59:08,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:59:08,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:59:08,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 03:59:08,393 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 03:59:08,393 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 03:59:08,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:59:08,393 INFO L85 PathProgramCache]: Analyzing trace with hash 365335128, now seen corresponding path program 8 times [2023-01-28 03:59:08,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:59:08,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279054041] [2023-01-28 03:59:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:59:08,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:59:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:59:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:59:09,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:59:09,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279054041] [2023-01-28 03:59:09,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279054041] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:59:09,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945278992] [2023-01-28 03:59:09,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:59:09,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:59:09,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:59:09,124 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 03:59:09,124 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 03:59:09,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:59:09,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:59:09,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 03:59:09,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:59:09,487 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2023-01-28 03:59:09,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 15 [2023-01-28 03:59:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:59:09,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:59:10,058 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-01-28 03:59:10,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 204 [2023-01-28 03:59:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:59:10,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945278992] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:59:10,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:59:10,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 30 [2023-01-28 03:59:10,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296348580] [2023-01-28 03:59:10,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:59:10,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 03:59:10,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:59:10,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 03:59:10,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-01-28 03:59:10,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 267 [2023-01-28 03:59:10,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 414 transitions, 4002 flow. Second operand has 32 states, 32 states have (on average 74.90625) internal successors, (2397), 32 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 03:59:10,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:59:10,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 267 [2023-01-28 03:59:10,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:59:12,717 INFO L130 PetriNetUnfolder]: 3555/6063 cut-off events. [2023-01-28 03:59:12,717 INFO L131 PetriNetUnfolder]: For 11568/11568 co-relation queries the response was YES. [2023-01-28 03:59:12,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24993 conditions, 6063 events. 3555/6063 cut-off events. For 11568/11568 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 39781 event pairs, 80 based on Foata normal form. 34/6097 useless extension candidates. Maximal degree in co-relation 24895. Up to 2075 conditions per place. [2023-01-28 03:59:12,793 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 313 selfloop transitions, 466 changer transitions 78/857 dead transitions. [2023-01-28 03:59:12,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 857 transitions, 9113 flow [2023-01-28 03:59:12,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 03:59:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 03:59:12,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3403 transitions. [2023-01-28 03:59:12,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2896663261831801 [2023-01-28 03:59:12,797 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3403 transitions. [2023-01-28 03:59:12,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3403 transitions. [2023-01-28 03:59:12,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:59:12,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3403 transitions. [2023-01-28 03:59:12,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 77.3409090909091) internal successors, (3403), 44 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:12,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 267.0) internal successors, (12015), 45 states have internal predecessors, (12015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:12,810 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 267.0) internal successors, (12015), 45 states have internal predecessors, (12015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:12,810 INFO L175 Difference]: Start difference. First operand has 183 places, 414 transitions, 4002 flow. Second operand 44 states and 3403 transitions. [2023-01-28 03:59:12,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 857 transitions, 9113 flow [2023-01-28 03:59:12,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 857 transitions, 8808 flow, removed 96 selfloop flow, removed 14 redundant places. [2023-01-28 03:59:12,969 INFO L231 Difference]: Finished difference. Result has 219 places, 611 transitions, 7052 flow [2023-01-28 03:59:12,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=3777, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=7052, PETRI_PLACES=219, PETRI_TRANSITIONS=611} [2023-01-28 03:59:12,970 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 197 predicate places. [2023-01-28 03:59:12,970 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 611 transitions, 7052 flow [2023-01-28 03:59:12,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 74.90625) internal successors, (2397), 32 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 03:59:12,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:59:12,970 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:59:12,976 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 03:59:13,171 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 03:59:13,171 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 03:59:13,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:59:13,171 INFO L85 PathProgramCache]: Analyzing trace with hash -27716245, now seen corresponding path program 9 times [2023-01-28 03:59:13,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:59:13,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215611015] [2023-01-28 03:59:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:59:13,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:59:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:59:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:59:14,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:59:14,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215611015] [2023-01-28 03:59:14,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215611015] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:59:14,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448571885] [2023-01-28 03:59:14,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:59:14,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:59:14,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:59:14,346 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 03:59:14,348 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 03:59:14,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 03:59:14,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:59:14,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 03:59:14,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:59:14,735 INFO L321 Elim1Store]: treesize reduction 32, result has 17.9 percent of original size [2023-01-28 03:59:14,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 21 [2023-01-28 03:59:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:59:14,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:59:15,336 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 03:59:15,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 268 treesize of output 222 [2023-01-28 03:59:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 03:59:15,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448571885] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:59:15,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:59:15,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 33 [2023-01-28 03:59:15,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509338721] [2023-01-28 03:59:15,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:59:15,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 03:59:15,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:59:15,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 03:59:15,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 03:59:15,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-01-28 03:59:15,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 611 transitions, 7052 flow. Second operand has 35 states, 35 states have (on average 67.8) internal successors, (2373), 35 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:15,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:59:15,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-01-28 03:59:15,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:59:19,519 INFO L130 PetriNetUnfolder]: 6085/10306 cut-off events. [2023-01-28 03:59:19,519 INFO L131 PetriNetUnfolder]: For 31892/31892 co-relation queries the response was YES. [2023-01-28 03:59:19,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47509 conditions, 10306 events. 6085/10306 cut-off events. For 31892/31892 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 72815 event pairs, 224 based on Foata normal form. 59/10365 useless extension candidates. Maximal degree in co-relation 47403. Up to 3997 conditions per place. [2023-01-28 03:59:19,579 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 447 selfloop transitions, 808 changer transitions 98/1353 dead transitions. [2023-01-28 03:59:19,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1353 transitions, 16882 flow [2023-01-28 03:59:19,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-01-28 03:59:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-01-28 03:59:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 4721 transitions. [2023-01-28 03:59:19,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26390519313544636 [2023-01-28 03:59:19,584 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 4721 transitions. [2023-01-28 03:59:19,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 4721 transitions. [2023-01-28 03:59:19,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:59:19,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 4721 transitions. [2023-01-28 03:59:19,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 70.46268656716418) internal successors, (4721), 67 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:19,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 267.0) internal successors, (18156), 68 states have internal predecessors, (18156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:19,601 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 267.0) internal successors, (18156), 68 states have internal predecessors, (18156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:19,602 INFO L175 Difference]: Start difference. First operand has 219 places, 611 transitions, 7052 flow. Second operand 67 states and 4721 transitions. [2023-01-28 03:59:19,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1353 transitions, 16882 flow [2023-01-28 03:59:20,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1353 transitions, 16410 flow, removed 153 selfloop flow, removed 25 redundant places. [2023-01-28 03:59:20,145 INFO L231 Difference]: Finished difference. Result has 280 places, 1000 transitions, 13853 flow [2023-01-28 03:59:20,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=13853, PETRI_PLACES=280, PETRI_TRANSITIONS=1000} [2023-01-28 03:59:20,146 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 258 predicate places. [2023-01-28 03:59:20,146 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 1000 transitions, 13853 flow [2023-01-28 03:59:20,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 67.8) internal successors, (2373), 35 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:20,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:59:20,147 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:59:20,154 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 03:59:20,351 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 03:59:20,351 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 03:59:20,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:59:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1001792257, now seen corresponding path program 10 times [2023-01-28 03:59:20,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:59:20,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755666656] [2023-01-28 03:59:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:59:20,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:59:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:59:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-28 03:59:20,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:59:20,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755666656] [2023-01-28 03:59:20,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755666656] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:59:20,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112022182] [2023-01-28 03:59:20,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:59:20,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:59:20,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:59:20,651 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 03:59:20,678 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 03:59:20,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:59:20,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:59:20,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 03:59:20,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:59:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-28 03:59:21,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:59:21,516 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-01-28 03:59:21,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 243 treesize of output 177 [2023-01-28 03:59:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-28 03:59:21,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112022182] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:59:21,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:59:21,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-01-28 03:59:21,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865765167] [2023-01-28 03:59:21,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:59:21,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 03:59:21,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:59:21,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 03:59:21,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-01-28 03:59:21,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 267 [2023-01-28 03:59:21,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 1000 transitions, 13853 flow. Second operand has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:21,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:59:21,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 267 [2023-01-28 03:59:21,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:59:23,440 INFO L130 PetriNetUnfolder]: 5107/8641 cut-off events. [2023-01-28 03:59:23,441 INFO L131 PetriNetUnfolder]: For 42320/42320 co-relation queries the response was YES. [2023-01-28 03:59:23,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44976 conditions, 8641 events. 5107/8641 cut-off events. For 42320/42320 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 58938 event pairs, 2540 based on Foata normal form. 30/8671 useless extension candidates. Maximal degree in co-relation 44890. Up to 8486 conditions per place. [2023-01-28 03:59:23,497 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 867 selfloop transitions, 4 changer transitions 31/902 dead transitions. [2023-01-28 03:59:23,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 902 transitions, 14252 flow [2023-01-28 03:59:23,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 03:59:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 03:59:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 816 transitions. [2023-01-28 03:59:23,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33957553058676654 [2023-01-28 03:59:23,499 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 816 transitions. [2023-01-28 03:59:23,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 816 transitions. [2023-01-28 03:59:23,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:59:23,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 816 transitions. [2023-01-28 03:59:23,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 90.66666666666667) internal successors, (816), 9 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:23,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:23,503 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:23,503 INFO L175 Difference]: Start difference. First operand has 280 places, 1000 transitions, 13853 flow. Second operand 9 states and 816 transitions. [2023-01-28 03:59:23,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 902 transitions, 14252 flow [2023-01-28 03:59:24,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 902 transitions, 13737 flow, removed 156 selfloop flow, removed 23 redundant places. [2023-01-28 03:59:24,265 INFO L231 Difference]: Finished difference. Result has 259 places, 871 transitions, 11681 flow [2023-01-28 03:59:24,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=11870, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=886, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11681, PETRI_PLACES=259, PETRI_TRANSITIONS=871} [2023-01-28 03:59:24,266 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 237 predicate places. [2023-01-28 03:59:24,266 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 871 transitions, 11681 flow [2023-01-28 03:59:24,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:24,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:59:24,266 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:59:24,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-01-28 03:59:24,467 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 03:59:24,467 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 03:59:24,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:59:24,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1446606786, now seen corresponding path program 11 times [2023-01-28 03:59:24,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:59:24,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238423850] [2023-01-28 03:59:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:59:24,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:59:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:59:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:59:25,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:59:25,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238423850] [2023-01-28 03:59:25,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238423850] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:59:25,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051676665] [2023-01-28 03:59:25,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 03:59:25,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:59:25,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:59:25,908 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 03:59:25,909 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 03:59:25,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 03:59:25,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:59:25,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 65 conjunts are in the unsatisfiable core [2023-01-28 03:59:25,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:59:26,099 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 03:59:26,141 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 03:59:26,172 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 03:59:26,826 INFO L321 Elim1Store]: treesize reduction 77, result has 11.5 percent of original size [2023-01-28 03:59:26,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 29 [2023-01-28 03:59:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:59:26,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:59:31,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:59:31,629 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 182 treesize of output 122 [2023-01-28 03:59:31,691 INFO L321 Elim1Store]: treesize reduction 26, result has 70.1 percent of original size [2023-01-28 03:59:31,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 792 treesize of output 748 [2023-01-28 03:59:31,712 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:59:31,716 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:59:31,716 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 03:59:31,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:59:31,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 256 treesize of output 276 [2023-01-28 03:59:31,799 INFO L321 Elim1Store]: treesize reduction 26, result has 70.1 percent of original size [2023-01-28 03:59:31,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 235 [2023-01-28 03:59:33,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:59:33,349 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 182 treesize of output 122 [2023-01-28 03:59:33,382 INFO L321 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2023-01-28 03:59:33,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 336 [2023-01-28 03:59:33,423 INFO L321 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2023-01-28 03:59:33,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 256 [2023-01-28 03:59:33,456 INFO L321 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2023-01-28 03:59:33,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 187 [2023-01-28 03:59:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:59:33,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051676665] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:59:33,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:59:33,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 46 [2023-01-28 03:59:33,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654679035] [2023-01-28 03:59:33,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:59:33,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-01-28 03:59:33,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:59:33,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-01-28 03:59:33,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2023, Unknown=4, NotChecked=0, Total=2256 [2023-01-28 03:59:33,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-01-28 03:59:33,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 871 transitions, 11681 flow. Second operand has 48 states, 48 states have (on average 67.52083333333333) internal successors, (3241), 48 states have internal predecessors, (3241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:33,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:59:33,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-01-28 03:59:33,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:00:29,655 WARN L222 SmtUtils]: Spent 7.58s on a formula simplification. DAG size of input: 95 DAG size of output: 93 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 04:00:49,804 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 04:00:51,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:01:05,809 WARN L222 SmtUtils]: Spent 11.47s on a formula simplification. DAG size of input: 98 DAG size of output: 96 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 04:01:22,129 WARN L539 Checker$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 04:01:26,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:01:43,571 WARN L539 Checker$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 04:02:34,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:02:36,285 WARN L539 Checker$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 04:02:41,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:02:46,833 WARN L222 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 112 DAG size of output: 93 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 04:02:57,449 WARN L222 SmtUtils]: Spent 7.16s on a formula simplification. DAG size of input: 100 DAG size of output: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 04:03:00,946 WARN L539 Checker$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 04:03:17,911 WARN L222 SmtUtils]: Spent 6.79s on a formula simplification. DAG size of input: 140 DAG size of output: 138 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 04:03:30,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:03:44,769 WARN L539 Checker$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 04:04:12,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:04:14,736 WARN L539 Checker$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 04:04:36,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:04:41,502 WARN L539 Checker$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 04:05:08,593 WARN L222 SmtUtils]: Spent 8.67s on a formula simplification. DAG size of input: 125 DAG size of output: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 04:05:36,667 WARN L222 SmtUtils]: Spent 10.25s on a formula simplification. DAG size of input: 127 DAG size of output: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 04:06:35,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:07:26,072 INFO L130 PetriNetUnfolder]: 19539/33571 cut-off events. [2023-01-28 04:07:26,072 INFO L131 PetriNetUnfolder]: For 155025/155025 co-relation queries the response was YES. [2023-01-28 04:07:26,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162289 conditions, 33571 events. 19539/33571 cut-off events. For 155025/155025 co-relation queries the response was YES. Maximal size of possible extension queue 1123. Compared 264555 event pairs, 812 based on Foata normal form. 777/34348 useless extension candidates. Maximal degree in co-relation 162214. Up to 12049 conditions per place. [2023-01-28 04:07:26,313 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 2361 selfloop transitions, 3243 changer transitions 706/6310 dead transitions. [2023-01-28 04:07:26,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 6310 transitions, 72983 flow [2023-01-28 04:07:26,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 527 states. [2023-01-28 04:07:26,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2023-01-28 04:07:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 37728 transitions. [2023-01-28 04:07:26,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2681278383045861 [2023-01-28 04:07:26,345 INFO L72 ComplementDD]: Start complementDD. Operand 527 states and 37728 transitions. [2023-01-28 04:07:26,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 527 states and 37728 transitions. [2023-01-28 04:07:26,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:07:26,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 527 states and 37728 transitions. [2023-01-28 04:07:26,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 528 states, 527 states have (on average 71.59013282732448) internal successors, (37728), 527 states have internal predecessors, (37728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:07:26,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 528 states, 528 states have (on average 267.0) internal successors, (140976), 528 states have internal predecessors, (140976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:07:26,633 INFO L81 ComplementDD]: Finished complementDD. Result has 528 states, 528 states have (on average 267.0) internal successors, (140976), 528 states have internal predecessors, (140976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:07:26,633 INFO L175 Difference]: Start difference. First operand has 259 places, 871 transitions, 11681 flow. Second operand 527 states and 37728 transitions. [2023-01-28 04:07:26,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 6310 transitions, 72983 flow [2023-01-28 04:07:28,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 739 places, 6310 transitions, 72675 flow, removed 97 selfloop flow, removed 25 redundant places. [2023-01-28 04:07:28,838 INFO L231 Difference]: Finished difference. Result has 927 places, 4249 transitions, 61806 flow [2023-01-28 04:07:28,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=11519, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=527, PETRI_FLOW=61806, PETRI_PLACES=927, PETRI_TRANSITIONS=4249} [2023-01-28 04:07:28,839 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 905 predicate places. [2023-01-28 04:07:28,839 INFO L495 AbstractCegarLoop]: Abstraction has has 927 places, 4249 transitions, 61806 flow [2023-01-28 04:07:28,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 67.52083333333333) internal successors, (3241), 48 states have internal predecessors, (3241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:07:28,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:07:28,840 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:07:28,847 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 04:07:29,043 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 04:07:29,043 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 04:07:29,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:07:29,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1656530734, now seen corresponding path program 12 times [2023-01-28 04:07:29,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:07:29,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728473232] [2023-01-28 04:07:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:07:29,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:07:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:07:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:07:30,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:07:30,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728473232] [2023-01-28 04:07:30,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728473232] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:07:30,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118010445] [2023-01-28 04:07:30,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:07:30,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:07:30,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:07:30,591 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 04:07:30,593 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 04:07:30,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 04:07:30,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:07:30,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 59 conjunts are in the unsatisfiable core [2023-01-28 04:07:30,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:07:31,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:07:31,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:07:31,528 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:07:31,529 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:07:31,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 18 [2023-01-28 04:07:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:07:31,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:07:32,616 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-01-28 04:07:32,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 310 treesize of output 250 [2023-01-28 04:07:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:07:33,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118010445] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:07:33,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:07:33,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 49 [2023-01-28 04:07:33,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717998976] [2023-01-28 04:07:33,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:07:33,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-01-28 04:07:33,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:07:33,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-01-28 04:07:33,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2023-01-28 04:07:33,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-01-28 04:07:33,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 927 places, 4249 transitions, 61806 flow. Second operand has 51 states, 51 states have (on average 67.45098039215686) internal successors, (3440), 51 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:07:33,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:07:33,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-01-28 04:07:33,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:08:18,262 INFO L130 PetriNetUnfolder]: 28861/49641 cut-off events. [2023-01-28 04:08:18,263 INFO L131 PetriNetUnfolder]: For 1850000/1850000 co-relation queries the response was YES. [2023-01-28 04:08:19,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314041 conditions, 49641 events. 28861/49641 cut-off events. For 1850000/1850000 co-relation queries the response was YES. Maximal size of possible extension queue 1941. Compared 425116 event pairs, 1012 based on Foata normal form. 60/49701 useless extension candidates. Maximal degree in co-relation 312487. Up to 20049 conditions per place. [2023-01-28 04:08:20,047 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 3360 selfloop transitions, 4127 changer transitions 139/7626 dead transitions. [2023-01-28 04:08:20,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1037 places, 7626 transitions, 123756 flow [2023-01-28 04:08:20,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-01-28 04:08:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2023-01-28 04:08:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 8735 transitions. [2023-01-28 04:08:20,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26383351455841486 [2023-01-28 04:08:20,054 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 8735 transitions. [2023-01-28 04:08:20,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 8735 transitions. [2023-01-28 04:08:20,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:08:20,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 8735 transitions. [2023-01-28 04:08:20,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 70.44354838709677) internal successors, (8735), 124 states have internal predecessors, (8735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:08:20,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 267.0) internal successors, (33375), 125 states have internal predecessors, (33375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:08:20,083 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 267.0) internal successors, (33375), 125 states have internal predecessors, (33375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:08:20,083 INFO L175 Difference]: Start difference. First operand has 927 places, 4249 transitions, 61806 flow. Second operand 124 states and 8735 transitions. [2023-01-28 04:08:20,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1037 places, 7626 transitions, 123756 flow [2023-01-28 04:09:42,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1012 places, 7626 transitions, 113476 flow, removed 5097 selfloop flow, removed 25 redundant places. [2023-01-28 04:09:42,571 INFO L231 Difference]: Finished difference. Result has 1061 places, 5940 transitions, 97333 flow [2023-01-28 04:09:42,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=56680, PETRI_DIFFERENCE_MINUEND_PLACES=889, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2565, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=97333, PETRI_PLACES=1061, PETRI_TRANSITIONS=5940} [2023-01-28 04:09:42,575 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1039 predicate places. [2023-01-28 04:09:42,575 INFO L495 AbstractCegarLoop]: Abstraction has has 1061 places, 5940 transitions, 97333 flow [2023-01-28 04:09:42,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 67.45098039215686) internal successors, (3440), 51 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:09:42,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:09:42,575 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:09:42,587 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 04:09:42,780 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 04:09:42,780 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 04:09:42,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:09:42,780 INFO L85 PathProgramCache]: Analyzing trace with hash 225616056, now seen corresponding path program 13 times [2023-01-28 04:09:42,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:09:42,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768865106] [2023-01-28 04:09:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:09:42,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:09:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:09:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:09:43,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:09:43,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768865106] [2023-01-28 04:09:43,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768865106] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:09:43,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228077255] [2023-01-28 04:09:43,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:09:43,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:09:43,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:09:43,797 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 04:09:43,799 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 04:09:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:09:43,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-28 04:09:43,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:09:44,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:09:44,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 12 [2023-01-28 04:09:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:09:44,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:09:45,532 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-01-28 04:09:45,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 310 treesize of output 250 [2023-01-28 04:09:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:09:46,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228077255] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:09:46,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:09:46,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 49 [2023-01-28 04:09:46,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436510762] [2023-01-28 04:09:46,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:09:46,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-01-28 04:09:46,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:09:46,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-01-28 04:09:46,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=2197, Unknown=0, NotChecked=0, Total=2550 [2023-01-28 04:09:46,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 267 [2023-01-28 04:09:46,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1061 places, 5940 transitions, 97333 flow. Second operand has 51 states, 51 states have (on average 74.45098039215686) internal successors, (3797), 51 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:09:46,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:09:46,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 267 [2023-01-28 04:09:46,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:10:44,916 INFO L130 PetriNetUnfolder]: 31721/54578 cut-off events. [2023-01-28 04:10:44,917 INFO L131 PetriNetUnfolder]: For 2064106/2064106 co-relation queries the response was YES. [2023-01-28 04:10:47,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361404 conditions, 54578 events. 31721/54578 cut-off events. For 2064106/2064106 co-relation queries the response was YES. Maximal size of possible extension queue 1725. Compared 471184 event pairs, 1136 based on Foata normal form. 133/54711 useless extension candidates. Maximal degree in co-relation 361134. Up to 15179 conditions per place. [2023-01-28 04:10:47,645 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 3108 selfloop transitions, 4505 changer transitions 188/7801 dead transitions. [2023-01-28 04:10:47,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1091 places, 7801 transitions, 134521 flow [2023-01-28 04:10:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-01-28 04:10:47,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-01-28 04:10:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 6823 transitions. [2023-01-28 04:10:47,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903898535921008 [2023-01-28 04:10:47,650 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 6823 transitions. [2023-01-28 04:10:47,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 6823 transitions. [2023-01-28 04:10:47,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:10:47,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 6823 transitions. [2023-01-28 04:10:47,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 77.5340909090909) internal successors, (6823), 88 states have internal predecessors, (6823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:10:47,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 267.0) internal successors, (23763), 89 states have internal predecessors, (23763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:10:47,666 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 267.0) internal successors, (23763), 89 states have internal predecessors, (23763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:10:47,666 INFO L175 Difference]: Start difference. First operand has 1061 places, 5940 transitions, 97333 flow. Second operand 88 states and 6823 transitions. [2023-01-28 04:10:47,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1091 places, 7801 transitions, 134521 flow Received shutdown request... [2023-01-28 04:12:19,288 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 04:12:19,288 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 04:12:19,298 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 04:12:19,302 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 04:12:19,499 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 04:12:19,499 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-28 04:12:19,500 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 04:12:19,500 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 04:12:19,501 INFO L445 BasicCegarLoop]: Path program histogram: [13, 1, 1, 1] [2023-01-28 04:12:19,503 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 04:12:19,503 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 04:12:19,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 04:12:19 BasicIcfg [2023-01-28 04:12:19,504 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 04:12:19,504 INFO L158 Benchmark]: Toolchain (without parser) took 831357.38ms. Allocated memory was 352.3MB in the beginning and 7.5GB in the end (delta: 7.2GB). Free memory was 300.3MB in the beginning and 3.2GB in the end (delta: -2.9GB). Peak memory consumption was 6.7GB. Max. memory is 16.0GB. [2023-01-28 04:12:19,505 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 255.9MB. Free memory is still 213.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 04:12:19,505 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.93ms. Allocated memory is still 352.3MB. Free memory was 300.3MB in the beginning and 288.5MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 04:12:19,505 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.02ms. Allocated memory is still 352.3MB. Free memory was 288.5MB in the beginning and 286.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 04:12:19,505 INFO L158 Benchmark]: Boogie Preprocessor took 17.22ms. Allocated memory is still 352.3MB. Free memory was 286.6MB in the beginning and 284.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 04:12:19,505 INFO L158 Benchmark]: RCFGBuilder took 476.13ms. Allocated memory is still 352.3MB. Free memory was 284.9MB in the beginning and 312.0MB in the end (delta: -27.1MB). Peak memory consumption was 10.6MB. Max. memory is 16.0GB. [2023-01-28 04:12:19,505 INFO L158 Benchmark]: TraceAbstraction took 830624.28ms. Allocated memory was 352.3MB in the beginning and 7.5GB in the end (delta: 7.2GB). Free memory was 311.7MB in the beginning and 3.2GB in the end (delta: -2.9GB). Peak memory consumption was 6.7GB. Max. memory is 16.0GB. [2023-01-28 04:12:19,506 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 213.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 212.93ms. Allocated memory is still 352.3MB. Free memory was 300.3MB in the beginning and 288.5MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 23.02ms. Allocated memory is still 352.3MB. Free memory was 288.5MB in the beginning and 286.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 17.22ms. Allocated memory is still 352.3MB. Free memory was 286.6MB in the beginning and 284.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 476.13ms. Allocated memory is still 352.3MB. Free memory was 284.9MB in the beginning and 312.0MB in the end (delta: -27.1MB). Peak memory consumption was 10.6MB. Max. memory is 16.0GB. * TraceAbstraction took 830624.28ms. Allocated memory was 352.3MB in the beginning and 7.5GB in the end (delta: 7.2GB). Free memory was 311.7MB in the beginning and 3.2GB in the end (delta: -2.9GB). Peak memory consumption was 6.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.3s, 121 PlacesBefore, 22 PlacesAfterwards, 125 TransitionsBefore, 19 TransitionsAfterwards, 1296 CoEnabledTransitionPairs, 7 FixpointIterations, 65 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 15 ConcurrentYvCompositions, 7 ChoiceCompositions, 132 TotalNumberOfCompositions, 1508 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1410, independent: 1392, independent conditional: 0, independent unconditional: 1392, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 762, independent: 755, independent conditional: 0, independent unconditional: 755, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1410, independent: 637, independent conditional: 0, independent unconditional: 637, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 762, unknown conditional: 0, unknown unconditional: 762] , Statistics on independence cache: Total cache size (in pairs): 28, Positive cache size: 26, Positive conditional cache size: 0, Positive unconditional cache size: 26, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 99]: 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: 100]: 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, 161 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: 830.5s, OverallIterations: 16, TraceHistogramMax: 4, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.0s, AutomataDifference: 791.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.4s, HoareTripleCheckerStatistics: 29 mSolverCounterUnknown, 4223 SdHoareTripleChecker+Valid, 56.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4223 mSDsluCounter, 154 SdHoareTripleChecker+Invalid, 54.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 216 IncrementalHoareTripleChecker+Unchecked, 142 mSDsCounter, 713 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19365 IncrementalHoareTripleChecker+Invalid, 20323 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 713 mSolverCounterUnsat, 12 mSDtfsCounter, 19365 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1604 GetRequests, 325 SyntacticMatches, 11 SemanticMatches, 1268 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 161332 ImplicationChecksByTransitivity, 468.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97333occurred in iteration=15, InterpolantAutomatonStates: 973, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 31.0s InterpolantComputationTime, 627 NumberOfCodeBlocks, 627 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 875 ConstructedInterpolants, 16 QuantifiedInterpolants, 18257 SizeOfPredicates, 330 NumberOfNonLiveVariables, 2686 ConjunctsInSsa, 432 ConjunctsInUnsatCore, 42 InterpolantComputations, 3 PerfectInterpolantSequences, 142/477 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