/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 07:57:33,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 07:57:33,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 07:57:33,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 07:57:33,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 07:57:33,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 07:57:33,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 07:57:33,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 07:57:33,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 07:57:33,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 07:57:33,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 07:57:33,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 07:57:33,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 07:57:33,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 07:57:33,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 07:57:33,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 07:57:33,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 07:57:33,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 07:57:33,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 07:57:33,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 07:57:33,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 07:57:33,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 07:57:33,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 07:57:33,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 07:57:33,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 07:57:33,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 07:57:33,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 07:57:33,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 07:57:33,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 07:57:33,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 07:57:33,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 07:57:33,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 07:57:33,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 07:57:33,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 07:57:33,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 07:57:33,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 07:57:33,076 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 07:57:33,098 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 07:57:33,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 07:57:33,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 07:57:33,099 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 07:57:33,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 07:57:33,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 07:57:33,100 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 07:57:33,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 07:57:33,100 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 07:57:33,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 07:57:33,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 07:57:33,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 07:57:33,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 07:57:33,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 07:57:33,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 07:57:33,101 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 07:57:33,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 07:57:33,101 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 07:57:33,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 07:57:33,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 07:57:33,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 07:57:33,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 07:57:33,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 07:57:33,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:57:33,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 07:57:33,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 07:57:33,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 07:57:33,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 07:57:33,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 07:57:33,102 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 07:57:33,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 07:57:33,103 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 07:57:33,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 07:57:33,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 07:57:33,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 07:57:33,315 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 07:57:33,316 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 07:57:33,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-01-28 07:57:34,234 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 07:57:34,406 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 07:57:34,407 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-01-28 07:57:34,416 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09c47feee/278247273d3c488795ae0b0a2b7870d7/FLAGf2cfdac4a [2023-01-28 07:57:34,432 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09c47feee/278247273d3c488795ae0b0a2b7870d7 [2023-01-28 07:57:34,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 07:57:34,435 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 07:57:34,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 07:57:34,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 07:57:34,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 07:57:34,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:57:34" (1/1) ... [2023-01-28 07:57:34,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77fbf59f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:34, skipping insertion in model container [2023-01-28 07:57:34,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:57:34" (1/1) ... [2023-01-28 07:57:34,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 07:57:34,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 07:57:34,722 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2023-01-28 07:57:34,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:57:34,747 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 07:57:34,764 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2023-01-28 07:57:34,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:57:34,792 INFO L208 MainTranslator]: Completed translation [2023-01-28 07:57:34,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:34 WrapperNode [2023-01-28 07:57:34,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 07:57:34,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 07:57:34,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 07:57:34,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 07:57:34,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:34" (1/1) ... [2023-01-28 07:57:34,806 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:34" (1/1) ... [2023-01-28 07:57:34,818 INFO L138 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2023-01-28 07:57:34,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 07:57:34,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 07:57:34,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 07:57:34,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 07:57:34,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:34" (1/1) ... [2023-01-28 07:57:34,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:34" (1/1) ... [2023-01-28 07:57:34,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:34" (1/1) ... [2023-01-28 07:57:34,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:34" (1/1) ... [2023-01-28 07:57:34,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:34" (1/1) ... [2023-01-28 07:57:34,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:34" (1/1) ... [2023-01-28 07:57:34,846 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:34" (1/1) ... [2023-01-28 07:57:34,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:34" (1/1) ... [2023-01-28 07:57:34,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 07:57:34,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 07:57:34,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 07:57:34,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 07:57:34,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:34" (1/1) ... [2023-01-28 07:57:34,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:57:34,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:57:34,874 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 07:57:34,880 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 07:57:34,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 07:57:34,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 07:57:34,903 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 07:57:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 07:57:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 07:57:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 07:57:34,904 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 07:57:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 07:57:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 07:57:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 07:57:34,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 07:57:34,905 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 07:57:35,003 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 07:57:35,005 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 07:57:35,226 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 07:57:35,234 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 07:57:35,234 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-01-28 07:57:35,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:57:35 BoogieIcfgContainer [2023-01-28 07:57:35,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 07:57:35,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 07:57:35,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 07:57:35,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 07:57:35,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 07:57:34" (1/3) ... [2023-01-28 07:57:35,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4993453f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:57:35, skipping insertion in model container [2023-01-28 07:57:35,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:34" (2/3) ... [2023-01-28 07:57:35,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4993453f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:57:35, skipping insertion in model container [2023-01-28 07:57:35,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:57:35" (3/3) ... [2023-01-28 07:57:35,241 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2023-01-28 07:57:35,252 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 07:57:35,252 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 07:57:35,252 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 07:57:35,295 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 07:57:35,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 124 transitions, 256 flow [2023-01-28 07:57:35,383 INFO L130 PetriNetUnfolder]: 30/179 cut-off events. [2023-01-28 07:57:35,383 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:57:35,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 179 events. 30/179 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 522 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-01-28 07:57:35,389 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 124 transitions, 256 flow [2023-01-28 07:57:35,395 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 119 transitions, 243 flow [2023-01-28 07:57:35,397 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:35,404 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 119 transitions, 243 flow [2023-01-28 07:57:35,406 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 119 transitions, 243 flow [2023-01-28 07:57:35,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 119 transitions, 243 flow [2023-01-28 07:57:35,428 INFO L130 PetriNetUnfolder]: 29/174 cut-off events. [2023-01-28 07:57:35,428 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:35,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 174 events. 29/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 512 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-01-28 07:57:35,432 INFO L119 LiptonReduction]: Number of co-enabled transitions 3782 [2023-01-28 07:57:37,115 INFO L134 LiptonReduction]: Checked pairs total: 9323 [2023-01-28 07:57:37,116 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-01-28 07:57:37,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:57:37,129 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;@26e1e61f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:37,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:57:37,135 INFO L130 PetriNetUnfolder]: 3/25 cut-off events. [2023-01-28 07:57:37,136 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:37,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:37,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 07:57:37,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:57:37,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:37,140 INFO L85 PathProgramCache]: Analyzing trace with hash 449238078, now seen corresponding path program 1 times [2023-01-28 07:57:37,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:37,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646814237] [2023-01-28 07:57:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:37,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:37,309 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 07:57:37,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:37,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646814237] [2023-01-28 07:57:37,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646814237] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:57:37,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:57:37,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:57:37,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428400303] [2023-01-28 07:57:37,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:57:37,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:57:37,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:57:37,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:57:37,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 210 [2023-01-28 07:57:37,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 52 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:37,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:37,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 210 [2023-01-28 07:57:37,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:37,434 INFO L130 PetriNetUnfolder]: 141/350 cut-off events. [2023-01-28 07:57:37,434 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:37,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 350 events. 141/350 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1471 event pairs, 65 based on Foata normal form. 53/364 useless extension candidates. Maximal degree in co-relation 631. Up to 281 conditions per place. [2023-01-28 07:57:37,437 INFO L137 encePairwiseOnDemand]: 192/210 looper letters, 30 selfloop transitions, 2 changer transitions 6/48 dead transitions. [2023-01-28 07:57:37,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 175 flow [2023-01-28 07:57:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:57:37,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:57:37,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2023-01-28 07:57:37,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-01-28 07:57:37,452 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2023-01-28 07:57:37,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2023-01-28 07:57:37,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:37,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2023-01-28 07:57:37,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:37,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:37,463 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:37,464 INFO L175 Difference]: Start difference. First operand has 40 places, 52 transitions, 109 flow. Second operand 3 states and 350 transitions. [2023-01-28 07:57:37,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 175 flow [2023-01-28 07:57:37,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 175 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:57:37,468 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 75 flow [2023-01-28 07:57:37,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-01-28 07:57:37,471 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-01-28 07:57:37,471 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 75 flow [2023-01-28 07:57:37,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:37,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:37,471 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 07:57:37,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 07:57:37,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:57:37,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1362181175, now seen corresponding path program 1 times [2023-01-28 07:57:37,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:37,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782244090] [2023-01-28 07:57:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:37,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:57:37,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:37,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782244090] [2023-01-28 07:57:37,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782244090] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:57:37,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179861897] [2023-01-28 07:57:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:37,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:57:37,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:57:37,548 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 07:57:37,562 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 07:57:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:37,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:57:37,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:57:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:57:37,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:57:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:57:37,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179861897] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:57:37,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:57:37,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:57:37,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833509472] [2023-01-28 07:57:37,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:57:37,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:57:37,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:37,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:57:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:57:37,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 210 [2023-01-28 07:57:37,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 75 flow. Second operand has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:37,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:37,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 210 [2023-01-28 07:57:37,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:37,706 INFO L130 PetriNetUnfolder]: 21/58 cut-off events. [2023-01-28 07:57:37,706 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-01-28 07:57:37,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 58 events. 21/58 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 119 event pairs, 0 based on Foata normal form. 10/64 useless extension candidates. Maximal degree in co-relation 125. Up to 40 conditions per place. [2023-01-28 07:57:37,707 INFO L137 encePairwiseOnDemand]: 207/210 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-01-28 07:57:37,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 119 flow [2023-01-28 07:57:37,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:57:37,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:57:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 414 transitions. [2023-01-28 07:57:37,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2023-01-28 07:57:37,709 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 414 transitions. [2023-01-28 07:57:37,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 414 transitions. [2023-01-28 07:57:37,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:37,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 414 transitions. [2023-01-28 07:57:37,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:37,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:37,712 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:37,712 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 75 flow. Second operand 4 states and 414 transitions. [2023-01-28 07:57:37,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 119 flow [2023-01-28 07:57:37,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 113 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 07:57:37,713 INFO L231 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2023-01-28 07:57:37,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2023-01-28 07:57:37,714 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -16 predicate places. [2023-01-28 07:57:37,714 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2023-01-28 07:57:37,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:37,716 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:57:37,723 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 07:57:37,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:57:37,924 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:57:37,926 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:57:37,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 124 transitions, 256 flow [2023-01-28 07:57:37,938 INFO L130 PetriNetUnfolder]: 30/179 cut-off events. [2023-01-28 07:57:37,938 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:57:37,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 179 events. 30/179 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 522 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-01-28 07:57:37,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 124 transitions, 256 flow [2023-01-28 07:57:37,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 119 transitions, 243 flow [2023-01-28 07:57:37,939 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:37,939 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 119 transitions, 243 flow [2023-01-28 07:57:37,940 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 119 transitions, 243 flow [2023-01-28 07:57:37,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 119 transitions, 243 flow [2023-01-28 07:57:37,949 INFO L130 PetriNetUnfolder]: 29/174 cut-off events. [2023-01-28 07:57:37,949 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:37,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 174 events. 29/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 512 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-01-28 07:57:37,952 INFO L119 LiptonReduction]: Number of co-enabled transitions 3782 [2023-01-28 07:57:39,475 INFO L134 LiptonReduction]: Checked pairs total: 10881 [2023-01-28 07:57:39,475 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-01-28 07:57:39,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:57:39,477 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;@26e1e61f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:39,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:57:39,479 INFO L130 PetriNetUnfolder]: 4/30 cut-off events. [2023-01-28 07:57:39,479 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:39,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:39,480 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 07:57:39,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:57:39,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:39,480 INFO L85 PathProgramCache]: Analyzing trace with hash -788287719, now seen corresponding path program 1 times [2023-01-28 07:57:39,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:39,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63668030] [2023-01-28 07:57:39,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:39,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:57:39,511 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:57:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:57:39,542 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:57:39,542 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:57:39,542 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:57:39,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 07:57:39,543 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:57:39,543 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:57:39,543 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:57:39,544 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 07:57:39,563 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 07:57:39,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 157 transitions, 332 flow [2023-01-28 07:57:39,586 INFO L130 PetriNetUnfolder]: 51/291 cut-off events. [2023-01-28 07:57:39,586 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:57:39,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 291 events. 51/291 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 965 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 181. Up to 9 conditions per place. [2023-01-28 07:57:39,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 157 transitions, 332 flow [2023-01-28 07:57:39,589 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 157 transitions, 332 flow [2023-01-28 07:57:39,589 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:39,589 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 157 transitions, 332 flow [2023-01-28 07:57:39,589 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 157 transitions, 332 flow [2023-01-28 07:57:39,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 157 transitions, 332 flow [2023-01-28 07:57:39,611 INFO L130 PetriNetUnfolder]: 51/291 cut-off events. [2023-01-28 07:57:39,611 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:57:39,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 291 events. 51/291 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 965 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 181. Up to 9 conditions per place. [2023-01-28 07:57:39,617 INFO L119 LiptonReduction]: Number of co-enabled transitions 10168 [2023-01-28 07:57:41,200 INFO L134 LiptonReduction]: Checked pairs total: 31064 [2023-01-28 07:57:41,200 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-01-28 07:57:41,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:57:41,202 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;@26e1e61f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:41,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:57:41,203 INFO L130 PetriNetUnfolder]: 3/23 cut-off events. [2023-01-28 07:57:41,204 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:41,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:41,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 07:57:41,204 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:57:41,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:41,204 INFO L85 PathProgramCache]: Analyzing trace with hash 807875875, now seen corresponding path program 1 times [2023-01-28 07:57:41,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:41,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455504508] [2023-01-28 07:57:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:41,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:41,222 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 07:57:41,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:41,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455504508] [2023-01-28 07:57:41,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455504508] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:57:41,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:57:41,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:57:41,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927430914] [2023-01-28 07:57:41,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:57:41,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:57:41,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:41,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:57:41,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:57:41,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 260 [2023-01-28 07:57:41,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 79 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:41,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:41,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 260 [2023-01-28 07:57:41,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:41,503 INFO L130 PetriNetUnfolder]: 2666/4603 cut-off events. [2023-01-28 07:57:41,504 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2023-01-28 07:57:41,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8797 conditions, 4603 events. 2666/4603 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 29730 event pairs, 1116 based on Foata normal form. 1005/5140 useless extension candidates. Maximal degree in co-relation 1325. Up to 4118 conditions per place. [2023-01-28 07:57:41,522 INFO L137 encePairwiseOnDemand]: 237/260 looper letters, 39 selfloop transitions, 2 changer transitions 10/69 dead transitions. [2023-01-28 07:57:41,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 254 flow [2023-01-28 07:57:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:57:41,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:57:41,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-01-28 07:57:41,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2023-01-28 07:57:41,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-01-28 07:57:41,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-01-28 07:57:41,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:41,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-01-28 07:57:41,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:41,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:41,530 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:41,530 INFO L175 Difference]: Start difference. First operand has 60 places, 79 transitions, 176 flow. Second operand 3 states and 442 transitions. [2023-01-28 07:57:41,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 254 flow [2023-01-28 07:57:41,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 69 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:57:41,533 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 118 flow [2023-01-28 07:57:41,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2023-01-28 07:57:41,535 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-01-28 07:57:41,535 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 118 flow [2023-01-28 07:57:41,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:41,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:41,535 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 07:57:41,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 07:57:41,537 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:57:41,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:41,539 INFO L85 PathProgramCache]: Analyzing trace with hash -221747516, now seen corresponding path program 1 times [2023-01-28 07:57:41,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:41,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620324277] [2023-01-28 07:57:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:41,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:57:41,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:41,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620324277] [2023-01-28 07:57:41,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620324277] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:57:41,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117823920] [2023-01-28 07:57:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:41,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:57:41,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:57:41,616 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 07:57:41,618 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 07:57:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:41,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:57:41,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:57:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:57:41,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:57:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:57:41,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117823920] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:57:41,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:57:41,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-28 07:57:41,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391821934] [2023-01-28 07:57:41,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:57:41,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 07:57:41,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:41,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 07:57:41,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-28 07:57:41,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 260 [2023-01-28 07:57:41,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 124.83333333333333) internal successors, (749), 6 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:41,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:41,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 260 [2023-01-28 07:57:41,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:41,827 INFO L130 PetriNetUnfolder]: 425/737 cut-off events. [2023-01-28 07:57:41,827 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2023-01-28 07:57:41,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1557 conditions, 737 events. 425/737 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3499 event pairs, 55 based on Foata normal form. 88/784 useless extension candidates. Maximal degree in co-relation 1181. Up to 480 conditions per place. [2023-01-28 07:57:41,829 INFO L137 encePairwiseOnDemand]: 257/260 looper letters, 0 selfloop transitions, 0 changer transitions 65/65 dead transitions. [2023-01-28 07:57:41,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 65 transitions, 250 flow [2023-01-28 07:57:41,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 07:57:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 07:57:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 664 transitions. [2023-01-28 07:57:41,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107692307692308 [2023-01-28 07:57:41,831 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 664 transitions. [2023-01-28 07:57:41,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 664 transitions. [2023-01-28 07:57:41,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:41,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 664 transitions. [2023-01-28 07:57:41,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:41,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:41,835 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:41,835 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 118 flow. Second operand 5 states and 664 transitions. [2023-01-28 07:57:41,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 65 transitions, 250 flow [2023-01-28 07:57:41,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 65 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:57:41,837 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-01-28 07:57:41,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-01-28 07:57:41,839 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -15 predicate places. [2023-01-28 07:57:41,839 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-01-28 07:57:41,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 124.83333333333333) internal successors, (749), 6 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:41,840 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:57:41,846 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 07:57:42,044 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 07:57:42,044 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:57:42,045 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:57:42,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 157 transitions, 332 flow [2023-01-28 07:57:42,063 INFO L130 PetriNetUnfolder]: 51/291 cut-off events. [2023-01-28 07:57:42,063 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:57:42,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 291 events. 51/291 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 965 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 181. Up to 9 conditions per place. [2023-01-28 07:57:42,065 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 157 transitions, 332 flow [2023-01-28 07:57:42,066 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 157 transitions, 332 flow [2023-01-28 07:57:42,066 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:42,066 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 157 transitions, 332 flow [2023-01-28 07:57:42,066 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 157 transitions, 332 flow [2023-01-28 07:57:42,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 157 transitions, 332 flow [2023-01-28 07:57:42,083 INFO L130 PetriNetUnfolder]: 51/291 cut-off events. [2023-01-28 07:57:42,083 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:57:42,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 291 events. 51/291 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 965 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 181. Up to 9 conditions per place. [2023-01-28 07:57:42,088 INFO L119 LiptonReduction]: Number of co-enabled transitions 10168 [2023-01-28 07:57:43,678 INFO L134 LiptonReduction]: Checked pairs total: 31705 [2023-01-28 07:57:43,679 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-01-28 07:57:43,680 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:57:43,680 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;@26e1e61f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:43,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:57:43,685 INFO L130 PetriNetUnfolder]: 24/92 cut-off events. [2023-01-28 07:57:43,685 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 07:57:43,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:43,685 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 07:57:43,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:57:43,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:43,686 INFO L85 PathProgramCache]: Analyzing trace with hash 25944173, now seen corresponding path program 1 times [2023-01-28 07:57:43,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:43,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307709911] [2023-01-28 07:57:43,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:43,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:57:43,708 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:57:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:57:43,721 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:57:43,721 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:57:43,721 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:57:43,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 07:57:43,722 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:57:43,722 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:57:43,722 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:57:43,723 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 07:57:43,740 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 07:57:43,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 190 transitions, 410 flow [2023-01-28 07:57:43,769 INFO L130 PetriNetUnfolder]: 77/434 cut-off events. [2023-01-28 07:57:43,769 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:57:43,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 434 events. 77/434 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1576 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 299. Up to 16 conditions per place. [2023-01-28 07:57:43,772 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 190 transitions, 410 flow [2023-01-28 07:57:43,774 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 190 transitions, 410 flow [2023-01-28 07:57:43,774 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:43,775 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 190 transitions, 410 flow [2023-01-28 07:57:43,775 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 190 transitions, 410 flow [2023-01-28 07:57:43,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 190 transitions, 410 flow [2023-01-28 07:57:43,797 INFO L130 PetriNetUnfolder]: 77/434 cut-off events. [2023-01-28 07:57:43,797 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:57:43,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 434 events. 77/434 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1576 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 299. Up to 16 conditions per place. [2023-01-28 07:57:43,808 INFO L119 LiptonReduction]: Number of co-enabled transitions 18414 [2023-01-28 07:57:45,491 INFO L134 LiptonReduction]: Checked pairs total: 62844 [2023-01-28 07:57:45,492 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-01-28 07:57:45,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:57:45,494 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;@26e1e61f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:45,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:57:45,496 INFO L130 PetriNetUnfolder]: 3/23 cut-off events. [2023-01-28 07:57:45,496 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:45,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:45,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 07:57:45,496 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:57:45,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:45,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1225794169, now seen corresponding path program 1 times [2023-01-28 07:57:45,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:45,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523208207] [2023-01-28 07:57:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:45,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:45,520 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 07:57:45,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:45,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523208207] [2023-01-28 07:57:45,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523208207] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:57:45,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:57:45,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:57:45,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474689706] [2023-01-28 07:57:45,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:57:45,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:57:45,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:45,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:57:45,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:57:45,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 305 [2023-01-28 07:57:45,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 104 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:45,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:45,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 305 [2023-01-28 07:57:45,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:48,185 INFO L130 PetriNetUnfolder]: 32568/47603 cut-off events. [2023-01-28 07:57:48,185 INFO L131 PetriNetUnfolder]: For 793/793 co-relation queries the response was YES. [2023-01-28 07:57:48,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92547 conditions, 47603 events. 32568/47603 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 1357. Compared 347303 event pairs, 25645 based on Foata normal form. 9143/53063 useless extension candidates. Maximal degree in co-relation 14872. Up to 44296 conditions per place. [2023-01-28 07:57:48,363 INFO L137 encePairwiseOnDemand]: 275/305 looper letters, 47 selfloop transitions, 2 changer transitions 12/87 dead transitions. [2023-01-28 07:57:48,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 87 transitions, 322 flow [2023-01-28 07:57:48,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:57:48,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:57:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2023-01-28 07:57:48,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5836065573770491 [2023-01-28 07:57:48,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2023-01-28 07:57:48,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2023-01-28 07:57:48,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:48,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2023-01-28 07:57:48,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:48,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:48,368 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:48,368 INFO L175 Difference]: Start difference. First operand has 78 places, 104 transitions, 238 flow. Second operand 3 states and 534 transitions. [2023-01-28 07:57:48,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 87 transitions, 322 flow [2023-01-28 07:57:48,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 322 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:57:48,372 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 157 flow [2023-01-28 07:57:48,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=157, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2023-01-28 07:57:48,373 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2023-01-28 07:57:48,373 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 157 flow [2023-01-28 07:57:48,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:48,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:48,374 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 07:57:48,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 07:57:48,374 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:57:48,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:48,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1812463824, now seen corresponding path program 1 times [2023-01-28 07:57:48,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:48,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492824160] [2023-01-28 07:57:48,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:48,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:57:48,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:48,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492824160] [2023-01-28 07:57:48,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492824160] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:57:48,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438312085] [2023-01-28 07:57:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:48,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:57:48,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:57:48,421 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 07:57:48,423 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 07:57:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:48,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:57:48,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:57:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:57:48,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:57:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:57:48,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438312085] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:57:48,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:57:48,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:57:48,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952002826] [2023-01-28 07:57:48,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:57:48,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:57:48,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:48,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:57:48,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:57:48,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 305 [2023-01-28 07:57:48,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 157 flow. Second operand has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:48,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:48,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 305 [2023-01-28 07:57:48,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:48,981 INFO L130 PetriNetUnfolder]: 5017/7667 cut-off events. [2023-01-28 07:57:48,981 INFO L131 PetriNetUnfolder]: For 1344/1344 co-relation queries the response was YES. [2023-01-28 07:57:48,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15576 conditions, 7667 events. 5017/7667 cut-off events. For 1344/1344 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 47581 event pairs, 784 based on Foata normal form. 648/8136 useless extension candidates. Maximal degree in co-relation 2426. Up to 4608 conditions per place. [2023-01-28 07:57:48,995 INFO L137 encePairwiseOnDemand]: 302/305 looper letters, 0 selfloop transitions, 0 changer transitions 106/106 dead transitions. [2023-01-28 07:57:48,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 106 transitions, 407 flow [2023-01-28 07:57:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:57:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:57:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 970 transitions. [2023-01-28 07:57:48,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300546448087432 [2023-01-28 07:57:48,998 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 970 transitions. [2023-01-28 07:57:48,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 970 transitions. [2023-01-28 07:57:48,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:48,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 970 transitions. [2023-01-28 07:57:49,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.66666666666666) internal successors, (970), 6 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:49,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:49,002 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:49,002 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 157 flow. Second operand 6 states and 970 transitions. [2023-01-28 07:57:49,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 106 transitions, 407 flow [2023-01-28 07:57:49,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 106 transitions, 403 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 07:57:49,004 INFO L231 Difference]: Finished difference. Result has 63 places, 0 transitions, 0 flow [2023-01-28 07:57:49,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=63, PETRI_TRANSITIONS=0} [2023-01-28 07:57:49,005 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -15 predicate places. [2023-01-28 07:57:49,005 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 0 transitions, 0 flow [2023-01-28 07:57:49,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.0) internal successors, (1050), 7 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:49,005 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:57:49,011 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 07:57:49,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:57:49,211 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:57:49,212 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:57:49,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 190 transitions, 410 flow [2023-01-28 07:57:49,242 INFO L130 PetriNetUnfolder]: 77/434 cut-off events. [2023-01-28 07:57:49,242 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:57:49,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 434 events. 77/434 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1576 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 299. Up to 16 conditions per place. [2023-01-28 07:57:49,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 190 transitions, 410 flow [2023-01-28 07:57:49,247 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 190 transitions, 410 flow [2023-01-28 07:57:49,247 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:49,247 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 190 transitions, 410 flow [2023-01-28 07:57:49,248 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 190 transitions, 410 flow [2023-01-28 07:57:49,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 190 transitions, 410 flow [2023-01-28 07:57:49,274 INFO L130 PetriNetUnfolder]: 77/434 cut-off events. [2023-01-28 07:57:49,274 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:57:49,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 434 events. 77/434 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1576 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 299. Up to 16 conditions per place. [2023-01-28 07:57:49,283 INFO L119 LiptonReduction]: Number of co-enabled transitions 18414 [2023-01-28 07:57:51,012 INFO L134 LiptonReduction]: Checked pairs total: 61724 [2023-01-28 07:57:51,012 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-01-28 07:57:51,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:57:51,014 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;@26e1e61f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:51,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:57:51,019 INFO L130 PetriNetUnfolder]: 38/142 cut-off events. [2023-01-28 07:57:51,019 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 07:57:51,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:51,019 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 07:57:51,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:57:51,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:51,019 INFO L85 PathProgramCache]: Analyzing trace with hash 760311120, now seen corresponding path program 1 times [2023-01-28 07:57:51,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:51,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636500648] [2023-01-28 07:57:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:51,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:57:51,029 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:57:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:57:51,036 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:57:51,036 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:57:51,037 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:57:51,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 07:57:51,037 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:57:51,037 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:57:51,037 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:57:51,037 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 07:57:51,048 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 07:57:51,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 223 transitions, 490 flow [2023-01-28 07:57:51,089 INFO L130 PetriNetUnfolder]: 115/641 cut-off events. [2023-01-28 07:57:51,089 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:57:51,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 641 events. 115/641 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2577 event pairs, 6 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 454. Up to 32 conditions per place. [2023-01-28 07:57:51,095 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 223 transitions, 490 flow [2023-01-28 07:57:51,098 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 223 transitions, 490 flow [2023-01-28 07:57:51,098 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:51,098 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 223 transitions, 490 flow [2023-01-28 07:57:51,098 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 223 transitions, 490 flow [2023-01-28 07:57:51,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 223 transitions, 490 flow [2023-01-28 07:57:51,137 INFO L130 PetriNetUnfolder]: 115/641 cut-off events. [2023-01-28 07:57:51,137 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:57:51,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 641 events. 115/641 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2577 event pairs, 6 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 454. Up to 32 conditions per place. [2023-01-28 07:57:51,154 INFO L119 LiptonReduction]: Number of co-enabled transitions 28768 [2023-01-28 07:57:52,825 INFO L134 LiptonReduction]: Checked pairs total: 102939 [2023-01-28 07:57:52,825 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-01-28 07:57:52,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:57:52,826 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;@26e1e61f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:52,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:57:52,827 INFO L130 PetriNetUnfolder]: 3/23 cut-off events. [2023-01-28 07:57:52,828 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:52,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:52,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 07:57:52,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:57:52,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:52,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1709569950, now seen corresponding path program 1 times [2023-01-28 07:57:52,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:52,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904698301] [2023-01-28 07:57:52,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:52,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:52,847 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 07:57:52,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:52,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904698301] [2023-01-28 07:57:52,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904698301] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:57:52,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:57:52,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:57:52,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285904616] [2023-01-28 07:57:52,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:57:52,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:57:52,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:52,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:57:52,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:57:52,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 356 [2023-01-28 07:57:52,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 127 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:52,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:52,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 356 [2023-01-28 07:57:52,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:58:40,080 INFO L130 PetriNetUnfolder]: 616819/834191 cut-off events. [2023-01-28 07:58:40,080 INFO L131 PetriNetUnfolder]: For 17980/17980 co-relation queries the response was YES. [2023-01-28 07:58:41,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1625862 conditions, 834191 events. 616819/834191 cut-off events. For 17980/17980 co-relation queries the response was YES. Maximal size of possible extension queue 18006. Compared 6728304 event pairs, 410065 based on Foata normal form. 128474/880263 useless extension candidates. Maximal degree in co-relation 158145. Up to 780955 conditions per place. [2023-01-28 07:58:43,864 INFO L137 encePairwiseOnDemand]: 320/356 looper letters, 61 selfloop transitions, 2 changer transitions 13/104 dead transitions. [2023-01-28 07:58:43,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 104 transitions, 400 flow [2023-01-28 07:58:43,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:58:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:58:43,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2023-01-28 07:58:43,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5898876404494382 [2023-01-28 07:58:43,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2023-01-28 07:58:43,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2023-01-28 07:58:43,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:58:43,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2023-01-28 07:58:43,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:58:43,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:58:43,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:58:43,869 INFO L175 Difference]: Start difference. First operand has 95 places, 127 transitions, 298 flow. Second operand 3 states and 630 transitions. [2023-01-28 07:58:43,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 104 transitions, 400 flow [2023-01-28 07:58:43,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 104 transitions, 400 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:58:43,876 INFO L231 Difference]: Finished difference. Result has 98 places, 82 transitions, 198 flow [2023-01-28 07:58:43,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=98, PETRI_TRANSITIONS=82} [2023-01-28 07:58:43,876 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 3 predicate places. [2023-01-28 07:58:43,876 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 82 transitions, 198 flow [2023-01-28 07:58:43,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:58:43,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:58:43,877 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 07:58:43,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 07:58:43,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:58:43,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:58:43,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1428102937, now seen corresponding path program 1 times [2023-01-28 07:58:43,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:58:43,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377627489] [2023-01-28 07:58:43,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:58:43,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:58:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:58:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:58:43,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:58:43,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377627489] [2023-01-28 07:58:43,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377627489] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:58:43,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790644840] [2023-01-28 07:58:43,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:58:43,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:58:43,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:58:43,916 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 07:58:43,918 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 07:58:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:58:43,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:58:43,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:58:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:58:43,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:58:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:58:44,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790644840] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:58:44,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:58:44,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:58:44,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322002156] [2023-01-28 07:58:44,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:58:44,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:58:44,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:58:44,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:58:44,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:58:44,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 356 [2023-01-28 07:58:44,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 82 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:58:44,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:58:44,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 356 [2023-01-28 07:58:44,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:59:11,152 INFO L130 PetriNetUnfolder]: 349033/488944 cut-off events. [2023-01-28 07:59:11,152 INFO L131 PetriNetUnfolder]: For 16307/16307 co-relation queries the response was YES. [2023-01-28 07:59:12,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949638 conditions, 488944 events. 349033/488944 cut-off events. For 16307/16307 co-relation queries the response was YES. Maximal size of possible extension queue 11884. Compared 4090085 event pairs, 15460 based on Foata normal form. 976/470459 useless extension candidates. Maximal degree in co-relation 734689. Up to 356401 conditions per place. [2023-01-28 07:59:14,021 INFO L137 encePairwiseOnDemand]: 352/356 looper letters, 148 selfloop transitions, 5 changer transitions 1/182 dead transitions. [2023-01-28 07:59:14,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 182 transitions, 710 flow [2023-01-28 07:59:14,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:59:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:59:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1189 transitions. [2023-01-28 07:59:14,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5566479400749064 [2023-01-28 07:59:14,023 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1189 transitions. [2023-01-28 07:59:14,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1189 transitions. [2023-01-28 07:59:14,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:59:14,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1189 transitions. [2023-01-28 07:59:14,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 198.16666666666666) internal successors, (1189), 6 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:59:14,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:59:14,028 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:59:14,028 INFO L175 Difference]: Start difference. First operand has 98 places, 82 transitions, 198 flow. Second operand 6 states and 1189 transitions. [2023-01-28 07:59:14,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 182 transitions, 710 flow [2023-01-28 07:59:14,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 182 transitions, 702 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-28 07:59:14,034 INFO L231 Difference]: Finished difference. Result has 97 places, 84 transitions, 224 flow [2023-01-28 07:59:14,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=97, PETRI_TRANSITIONS=84} [2023-01-28 07:59:14,035 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, 2 predicate places. [2023-01-28 07:59:14,035 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 84 transitions, 224 flow [2023-01-28 07:59:14,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:59:14,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:59:14,036 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:59:14,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 07:59:14,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:59:14,240 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:59:14,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:59:14,240 INFO L85 PathProgramCache]: Analyzing trace with hash 69879322, now seen corresponding path program 1 times [2023-01-28 07:59:14,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:59:14,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020918452] [2023-01-28 07:59:14,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:59:14,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:59:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:59:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:59:14,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:59:14,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020918452] [2023-01-28 07:59:14,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020918452] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:59:14,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976345395] [2023-01-28 07:59:14,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:59:14,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:59:14,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:59:14,316 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 07:59:14,318 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 07:59:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:59:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 07:59:14,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:59:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:59:14,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:59:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:59:14,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976345395] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:59:14,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:59:14,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 07:59:14,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157858774] [2023-01-28 07:59:14,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:59:14,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 07:59:14,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:59:14,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 07:59:14,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 07:59:14,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 356 [2023-01-28 07:59:14,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 84 transitions, 224 flow. Second operand has 13 states, 13 states have (on average 175.0) internal successors, (2275), 13 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:59:14,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:59:14,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 356 [2023-01-28 07:59:14,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:59:19,284 INFO L130 PetriNetUnfolder]: 63913/90304 cut-off events. [2023-01-28 07:59:19,285 INFO L131 PetriNetUnfolder]: For 110947/110947 co-relation queries the response was YES. [2023-01-28 07:59:19,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203588 conditions, 90304 events. 63913/90304 cut-off events. For 110947/110947 co-relation queries the response was YES. Maximal size of possible extension queue 2577. Compared 652864 event pairs, 4460 based on Foata normal form. 7920/93691 useless extension candidates. Maximal degree in co-relation 101704. Up to 39600 conditions per place. [2023-01-28 07:59:19,544 INFO L137 encePairwiseOnDemand]: 353/356 looper letters, 0 selfloop transitions, 0 changer transitions 168/168 dead transitions. [2023-01-28 07:59:19,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 168 transitions, 680 flow [2023-01-28 07:59:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 07:59:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 07:59:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1350 transitions. [2023-01-28 07:59:19,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5417335473515249 [2023-01-28 07:59:19,547 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1350 transitions. [2023-01-28 07:59:19,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1350 transitions. [2023-01-28 07:59:19,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:59:19,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1350 transitions. [2023-01-28 07:59:19,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 192.85714285714286) internal successors, (1350), 7 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:59:19,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 356.0) internal successors, (2848), 8 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:59:19,552 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 356.0) internal successors, (2848), 8 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:59:19,552 INFO L175 Difference]: Start difference. First operand has 97 places, 84 transitions, 224 flow. Second operand 7 states and 1350 transitions. [2023-01-28 07:59:19,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 168 transitions, 680 flow [2023-01-28 07:59:19,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 168 transitions, 661 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-01-28 07:59:19,642 INFO L231 Difference]: Finished difference. Result has 83 places, 0 transitions, 0 flow [2023-01-28 07:59:19,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=83, PETRI_TRANSITIONS=0} [2023-01-28 07:59:19,643 INFO L281 CegarLoopForPetriNet]: 95 programPoint places, -12 predicate places. [2023-01-28 07:59:19,643 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 0 transitions, 0 flow [2023-01-28 07:59:19,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 175.0) internal successors, (2275), 13 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:59:19,644 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:59:19,648 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 07:59:19,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-28 07:59:19,845 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-28 07:59:19,845 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:59:19,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 223 transitions, 490 flow [2023-01-28 07:59:19,882 INFO L130 PetriNetUnfolder]: 115/641 cut-off events. [2023-01-28 07:59:19,882 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:59:19,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 641 events. 115/641 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2577 event pairs, 6 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 454. Up to 32 conditions per place. [2023-01-28 07:59:19,885 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 223 transitions, 490 flow [2023-01-28 07:59:19,887 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 223 transitions, 490 flow [2023-01-28 07:59:19,887 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:59:19,887 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 223 transitions, 490 flow [2023-01-28 07:59:19,888 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 223 transitions, 490 flow [2023-01-28 07:59:19,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 223 transitions, 490 flow [2023-01-28 07:59:19,924 INFO L130 PetriNetUnfolder]: 115/641 cut-off events. [2023-01-28 07:59:19,924 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:59:19,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 641 events. 115/641 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2577 event pairs, 6 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 454. Up to 32 conditions per place. [2023-01-28 07:59:19,939 INFO L119 LiptonReduction]: Number of co-enabled transitions 28768 [2023-01-28 07:59:21,634 INFO L134 LiptonReduction]: Checked pairs total: 101199 [2023-01-28 07:59:21,634 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-01-28 07:59:21,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:59:21,635 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;@26e1e61f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:59:21,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:59:21,643 INFO L130 PetriNetUnfolder]: 56/200 cut-off events. [2023-01-28 07:59:21,643 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-01-28 07:59:21,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:59:21,643 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-28 07:59:21,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:59:21,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:59:21,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1281142070, now seen corresponding path program 1 times [2023-01-28 07:59:21,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:59:21,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205523747] [2023-01-28 07:59:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:59:21,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:59:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:59:21,671 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:59:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:59:21,686 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:59:21,686 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:59:21,686 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:59:21,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 07:59:21,686 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:59:21,687 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:59:21,687 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:59:21,687 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-28 07:59:21,706 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-28 07:59:21,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 256 transitions, 572 flow [2023-01-28 07:59:21,789 INFO L130 PetriNetUnfolder]: 181/980 cut-off events. [2023-01-28 07:59:21,790 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-28 07:59:21,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 980 events. 181/980 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4483 event pairs, 23 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 686. Up to 80 conditions per place. [2023-01-28 07:59:21,800 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 256 transitions, 572 flow [2023-01-28 07:59:21,804 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 216 places, 256 transitions, 572 flow [2023-01-28 07:59:21,805 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:59:21,805 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 216 places, 256 transitions, 572 flow [2023-01-28 07:59:21,805 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 216 places, 256 transitions, 572 flow [2023-01-28 07:59:21,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 256 transitions, 572 flow [2023-01-28 07:59:21,879 INFO L130 PetriNetUnfolder]: 181/980 cut-off events. [2023-01-28 07:59:21,879 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-28 07:59:21,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 980 events. 181/980 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4483 event pairs, 23 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 686. Up to 80 conditions per place. [2023-01-28 07:59:21,910 INFO L119 LiptonReduction]: Number of co-enabled transitions 41230 [2023-01-28 07:59:23,903 INFO L134 LiptonReduction]: Checked pairs total: 168973 [2023-01-28 07:59:23,903 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-01-28 07:59:23,904 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:59:23,904 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;@26e1e61f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:59:23,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:59:23,905 INFO L130 PetriNetUnfolder]: 3/23 cut-off events. [2023-01-28 07:59:23,906 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:59:23,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:59:23,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 07:59:23,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:59:23,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:59:23,906 INFO L85 PathProgramCache]: Analyzing trace with hash -2037735863, now seen corresponding path program 1 times [2023-01-28 07:59:23,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:59:23,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788076368] [2023-01-28 07:59:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:59:23,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:59:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:59:23,927 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 07:59:23,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:59:23,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788076368] [2023-01-28 07:59:23,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788076368] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:59:23,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:59:23,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:59:23,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542167026] [2023-01-28 07:59:23,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:59:23,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:59:23,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:59:23,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:59:23,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:59:23,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 405 [2023-01-28 07:59:23,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 150 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:59:23,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:59:23,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 405 [2023-01-28 07:59:23,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand