/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_60-invariant_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 07:56:58,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 07:56:58,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 07:56:58,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 07:56:58,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 07:56:58,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 07:56:58,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 07:56:58,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 07:56:58,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 07:56:58,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 07:56:58,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 07:56:58,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 07:56:58,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 07:56:58,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 07:56:58,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 07:56:58,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 07:56:58,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 07:56:58,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 07:56:58,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 07:56:58,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 07:56:58,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 07:56:58,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 07:56:58,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 07:56:58,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 07:56:58,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 07:56:58,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 07:56:58,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 07:56:58,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 07:56:58,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 07:56:58,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 07:56:58,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 07:56:58,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 07:56:58,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 07:56:58,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 07:56:58,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 07:56:58,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 07:56:58,280 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 07:56:58,294 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 07:56:58,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 07:56:58,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 07:56:58,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 07:56:58,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 07:56:58,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 07:56:58,295 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 07:56:58,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 07:56:58,296 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 07:56:58,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 07:56:58,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 07:56:58,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 07:56:58,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 07:56:58,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 07:56:58,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 07:56:58,297 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 07:56:58,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 07:56:58,297 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 07:56:58,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 07:56:58,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 07:56:58,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 07:56:58,297 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 07:56:58,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 07:56:58,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:56:58,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 07:56:58,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 07:56:58,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 07:56:58,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 07:56:58,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 07:56:58,298 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 07:56:58,298 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 07:56:58,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 07:56:58,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 07:56:58,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 07:56:58,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 07:56:58,478 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 07:56:58,484 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 07:56:58,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-01-28 07:56:59,661 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 07:56:59,820 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 07:56:59,821 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-01-28 07:56:59,828 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89083446e/314270c796e445fa8c15586e6bd8234e/FLAG549b92cbd [2023-01-28 07:56:59,838 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89083446e/314270c796e445fa8c15586e6bd8234e [2023-01-28 07:56:59,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 07:56:59,840 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 07:56:59,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 07:56:59,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 07:56:59,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 07:56:59,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:56:59" (1/1) ... [2023-01-28 07:56:59,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be0861e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:56:59, skipping insertion in model container [2023-01-28 07:56:59,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:56:59" (1/1) ... [2023-01-28 07:56:59,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 07:56:59,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 07:57:00,087 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_60-invariant_racefree.i[30176,30189] [2023-01-28 07:57:00,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:57:00,117 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 07:57:00,159 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_60-invariant_racefree.i[30176,30189] [2023-01-28 07:57:00,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:57:00,194 INFO L208 MainTranslator]: Completed translation [2023-01-28 07:57:00,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:00 WrapperNode [2023-01-28 07:57:00,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 07:57:00,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 07:57:00,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 07:57:00,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 07:57:00,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:00" (1/1) ... [2023-01-28 07:57:00,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:00" (1/1) ... [2023-01-28 07:57:00,242 INFO L138 Inliner]: procedures = 170, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 141 [2023-01-28 07:57:00,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 07:57:00,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 07:57:00,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 07:57:00,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 07:57:00,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:00" (1/1) ... [2023-01-28 07:57:00,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:00" (1/1) ... [2023-01-28 07:57:00,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:00" (1/1) ... [2023-01-28 07:57:00,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:00" (1/1) ... [2023-01-28 07:57:00,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:00" (1/1) ... [2023-01-28 07:57:00,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:00" (1/1) ... [2023-01-28 07:57:00,258 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:00" (1/1) ... [2023-01-28 07:57:00,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:00" (1/1) ... [2023-01-28 07:57:00,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 07:57:00,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 07:57:00,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 07:57:00,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 07:57:00,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:00" (1/1) ... [2023-01-28 07:57:00,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:57:00,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:57:00,288 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 07:57:00,305 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 07:57:00,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 07:57:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 07:57:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 07:57:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 07:57:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 07:57:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 07:57:00,347 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 07:57:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 07:57:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 07:57:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 07:57:00,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 07:57:00,349 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 07:57:00,433 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 07:57:00,434 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 07:57:00,626 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 07:57:00,631 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 07:57:00,631 INFO L302 CfgBuilder]: Removed 18 assume(true) statements. [2023-01-28 07:57:00,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:57:00 BoogieIcfgContainer [2023-01-28 07:57:00,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 07:57:00,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 07:57:00,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 07:57:00,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 07:57:00,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 07:56:59" (1/3) ... [2023-01-28 07:57:00,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f40e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:57:00, skipping insertion in model container [2023-01-28 07:57:00,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:57:00" (2/3) ... [2023-01-28 07:57:00,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f40e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:57:00, skipping insertion in model container [2023-01-28 07:57:00,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:57:00" (3/3) ... [2023-01-28 07:57:00,638 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_60-invariant_racefree.i [2023-01-28 07:57:00,650 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 07:57:00,650 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-28 07:57:00,650 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 07:57:00,704 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 07:57:00,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 138 transitions, 284 flow [2023-01-28 07:57:00,816 INFO L130 PetriNetUnfolder]: 33/193 cut-off events. [2023-01-28 07:57:00,816 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:57:00,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 193 events. 33/193 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 633 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-01-28 07:57:00,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 138 transitions, 284 flow [2023-01-28 07:57:00,824 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 133 transitions, 271 flow [2023-01-28 07:57:00,826 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:00,832 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 133 transitions, 271 flow [2023-01-28 07:57:00,834 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 133 transitions, 271 flow [2023-01-28 07:57:00,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 133 transitions, 271 flow [2023-01-28 07:57:00,855 INFO L130 PetriNetUnfolder]: 32/188 cut-off events. [2023-01-28 07:57:00,856 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:00,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 188 events. 32/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 619 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-01-28 07:57:00,859 INFO L119 LiptonReduction]: Number of co-enabled transitions 5490 [2023-01-28 07:57:02,368 INFO L134 LiptonReduction]: Checked pairs total: 14551 [2023-01-28 07:57:02,369 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-01-28 07:57:02,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:57:02,407 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;@5403e8a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:02,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 07:57:02,414 INFO L130 PetriNetUnfolder]: 1/16 cut-off events. [2023-01-28 07:57:02,415 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:02,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:02,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 07:57:02,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:57:02,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash 512707676, now seen corresponding path program 1 times [2023-01-28 07:57:02,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:02,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496458270] [2023-01-28 07:57:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:02,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:02,592 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 07:57:02,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:02,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496458270] [2023-01-28 07:57:02,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496458270] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:57:02,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:57:02,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:57:02,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335691518] [2023-01-28 07:57:02,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:57:02,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:57:02,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:02,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:57:02,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:57:02,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 235 [2023-01-28 07:57:02,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 62 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:02,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:02,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 235 [2023-01-28 07:57:02,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:02,754 INFO L130 PetriNetUnfolder]: 211/547 cut-off events. [2023-01-28 07:57:02,755 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:02,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 547 events. 211/547 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2758 event pairs, 0 based on Foata normal form. 88/558 useless extension candidates. Maximal degree in co-relation 964. Up to 421 conditions per place. [2023-01-28 07:57:02,761 INFO L137 encePairwiseOnDemand]: 213/235 looper letters, 45 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-01-28 07:57:02,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 215 flow [2023-01-28 07:57:02,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:57:02,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:57:02,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-01-28 07:57:02,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631205673758866 [2023-01-28 07:57:02,775 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-01-28 07:57:02,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-01-28 07:57:02,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:02,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-01-28 07:57:02,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:02,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:02,796 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:02,797 INFO L175 Difference]: Start difference. First operand has 46 places, 62 transitions, 129 flow. Second operand 3 states and 397 transitions. [2023-01-28 07:57:02,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 215 flow [2023-01-28 07:57:02,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:57:02,802 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 97 flow [2023-01-28 07:57:02,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-01-28 07:57:02,807 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-01-28 07:57:02,808 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 97 flow [2023-01-28 07:57:02,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:02,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:02,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:57:02,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 07:57:02,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:57:02,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:02,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1308553740, now seen corresponding path program 1 times [2023-01-28 07:57:02,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:02,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470765955] [2023-01-28 07:57:02,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:02,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:02,939 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 07:57:02,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:02,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470765955] [2023-01-28 07:57:02,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470765955] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:57:02,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:57:02,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 07:57:02,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127129231] [2023-01-28 07:57:02,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:57:02,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:57:02,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:02,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:57:02,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:57:02,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 235 [2023-01-28 07:57:02,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:02,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:02,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 235 [2023-01-28 07:57:02,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:03,023 INFO L130 PetriNetUnfolder]: 246/573 cut-off events. [2023-01-28 07:57:03,024 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-01-28 07:57:03,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1146 conditions, 573 events. 246/573 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2716 event pairs, 129 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 1128. Up to 369 conditions per place. [2023-01-28 07:57:03,026 INFO L137 encePairwiseOnDemand]: 227/235 looper letters, 41 selfloop transitions, 4 changer transitions 6/57 dead transitions. [2023-01-28 07:57:03,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 227 flow [2023-01-28 07:57:03,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:57:03,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:57:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-01-28 07:57:03,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5063829787234042 [2023-01-28 07:57:03,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-01-28 07:57:03,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-01-28 07:57:03,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:03,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-01-28 07:57:03,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:03,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:03,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:03,030 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 97 flow. Second operand 3 states and 357 transitions. [2023-01-28 07:57:03,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 227 flow [2023-01-28 07:57:03,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 57 transitions, 223 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 07:57:03,031 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 121 flow [2023-01-28 07:57:03,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-01-28 07:57:03,032 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-01-28 07:57:03,032 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 121 flow [2023-01-28 07:57:03,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:03,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:03,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:57:03,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 07:57:03,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:57:03,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:03,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1926413753, now seen corresponding path program 1 times [2023-01-28 07:57:03,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:03,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510899141] [2023-01-28 07:57:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:03,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:03,079 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 07:57:03,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:03,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510899141] [2023-01-28 07:57:03,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510899141] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:57:03,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920393785] [2023-01-28 07:57:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:03,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:57:03,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:57:03,082 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 07:57:03,101 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 07:57:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:03,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:57:03,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:57:03,230 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 07:57:03,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:57:03,258 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 07:57:03,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920393785] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:57:03,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:57:03,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-28 07:57:03,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836100919] [2023-01-28 07:57:03,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:57:03,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 07:57:03,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:03,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 07:57:03,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-28 07:57:03,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 235 [2023-01-28 07:57:03,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 109.83333333333333) internal successors, (659), 6 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:03,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:03,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 235 [2023-01-28 07:57:03,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:03,276 INFO L130 PetriNetUnfolder]: 12/35 cut-off events. [2023-01-28 07:57:03,277 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 07:57:03,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 35 events. 12/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 7/42 useless extension candidates. Maximal degree in co-relation 80. Up to 26 conditions per place. [2023-01-28 07:57:03,277 INFO L137 encePairwiseOnDemand]: 232/235 looper letters, 0 selfloop transitions, 0 changer transitions 17/17 dead transitions. [2023-01-28 07:57:03,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 17 transitions, 81 flow [2023-01-28 07:57:03,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:57:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:57:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 446 transitions. [2023-01-28 07:57:03,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474468085106383 [2023-01-28 07:57:03,278 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 446 transitions. [2023-01-28 07:57:03,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 446 transitions. [2023-01-28 07:57:03,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:03,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 446 transitions. [2023-01-28 07:57:03,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.5) internal successors, (446), 4 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 07:57:03,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:03,281 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:03,281 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 121 flow. Second operand 4 states and 446 transitions. [2023-01-28 07:57:03,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 17 transitions, 81 flow [2023-01-28 07:57:03,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 17 transitions, 72 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-01-28 07:57:03,282 INFO L231 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2023-01-28 07:57:03,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2023-01-28 07:57:03,282 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -29 predicate places. [2023-01-28 07:57:03,283 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2023-01-28 07:57:03,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 109.83333333333333) internal successors, (659), 6 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:03,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 07:57:03,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-28 07:57:03,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-28 07:57:03,293 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 07:57:03,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:57:03,486 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-28 07:57:03,488 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-01-28 07:57:03,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 138 transitions, 284 flow [2023-01-28 07:57:03,502 INFO L130 PetriNetUnfolder]: 33/193 cut-off events. [2023-01-28 07:57:03,502 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:57:03,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 193 events. 33/193 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 633 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-01-28 07:57:03,503 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 138 transitions, 284 flow [2023-01-28 07:57:03,504 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 133 transitions, 271 flow [2023-01-28 07:57:03,504 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:03,504 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 133 transitions, 271 flow [2023-01-28 07:57:03,504 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 133 transitions, 271 flow [2023-01-28 07:57:03,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 133 transitions, 271 flow [2023-01-28 07:57:03,514 INFO L130 PetriNetUnfolder]: 32/188 cut-off events. [2023-01-28 07:57:03,514 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:03,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 188 events. 32/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 619 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-01-28 07:57:03,517 INFO L119 LiptonReduction]: Number of co-enabled transitions 5490 [2023-01-28 07:57:04,984 INFO L134 LiptonReduction]: Checked pairs total: 14481 [2023-01-28 07:57:04,984 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-01-28 07:57:04,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:57:04,986 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;@5403e8a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:04,987 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:57:04,989 INFO L130 PetriNetUnfolder]: 8/36 cut-off events. [2023-01-28 07:57:04,989 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:04,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:04,989 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 07:57:04,989 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:57:04,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:04,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1580414617, now seen corresponding path program 1 times [2023-01-28 07:57:04,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:04,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323353676] [2023-01-28 07:57:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:04,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:57:05,001 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:57:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:57:05,018 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:57:05,018 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:57:05,018 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:57:05,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 07:57:05,018 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:57:05,019 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:57:05,019 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:57:05,019 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 07:57:05,032 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 07:57:05,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 185 transitions, 388 flow [2023-01-28 07:57:05,051 INFO L130 PetriNetUnfolder]: 57/319 cut-off events. [2023-01-28 07:57:05,051 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:57:05,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 319 events. 57/319 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1201 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 195. Up to 9 conditions per place. [2023-01-28 07:57:05,062 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 185 transitions, 388 flow [2023-01-28 07:57:05,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 185 transitions, 388 flow [2023-01-28 07:57:05,064 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:05,064 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 185 transitions, 388 flow [2023-01-28 07:57:05,064 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 185 transitions, 388 flow [2023-01-28 07:57:05,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 185 transitions, 388 flow [2023-01-28 07:57:05,080 INFO L130 PetriNetUnfolder]: 57/319 cut-off events. [2023-01-28 07:57:05,080 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:57:05,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 319 events. 57/319 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1201 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 195. Up to 9 conditions per place. [2023-01-28 07:57:05,088 INFO L119 LiptonReduction]: Number of co-enabled transitions 16020 [2023-01-28 07:57:06,747 INFO L134 LiptonReduction]: Checked pairs total: 45797 [2023-01-28 07:57:06,747 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-01-28 07:57:06,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:57:06,757 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;@5403e8a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:06,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 07:57:06,759 INFO L130 PetriNetUnfolder]: 1/16 cut-off events. [2023-01-28 07:57:06,759 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:06,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:06,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 07:57:06,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 07:57:06,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:06,760 INFO L85 PathProgramCache]: Analyzing trace with hash 945798373, now seen corresponding path program 1 times [2023-01-28 07:57:06,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:06,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057984056] [2023-01-28 07:57:06,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:06,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:06,780 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 07:57:06,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:06,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057984056] [2023-01-28 07:57:06,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057984056] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:57:06,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:57:06,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:57:06,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636917613] [2023-01-28 07:57:06,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:57:06,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:57:06,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:06,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:57:06,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:57:06,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 310 [2023-01-28 07:57:06,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 95 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:06,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:06,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 310 [2023-01-28 07:57:06,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:07,399 INFO L130 PetriNetUnfolder]: 5106/8979 cut-off events. [2023-01-28 07:57:07,399 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-01-28 07:57:07,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16936 conditions, 8979 events. 5106/8979 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 67707 event pairs, 2208 based on Foata normal form. 1727/9079 useless extension candidates. Maximal degree in co-relation 2572. Up to 7850 conditions per place. [2023-01-28 07:57:07,443 INFO L137 encePairwiseOnDemand]: 281/310 looper letters, 58 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-01-28 07:57:07,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 304 flow [2023-01-28 07:57:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:57:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:57:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-01-28 07:57:07,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612903225806452 [2023-01-28 07:57:07,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-01-28 07:57:07,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-01-28 07:57:07,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:07,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-01-28 07:57:07,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:07,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:07,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:07,449 INFO L175 Difference]: Start difference. First operand has 70 places, 95 transitions, 208 flow. Second operand 3 states and 522 transitions. [2023-01-28 07:57:07,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 304 flow [2023-01-28 07:57:07,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:57:07,452 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 168 flow [2023-01-28 07:57:07,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2023-01-28 07:57:07,452 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-01-28 07:57:07,452 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 168 flow [2023-01-28 07:57:07,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:07,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:07,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:57:07,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 07:57:07,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 07:57:07,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:07,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1876051564, now seen corresponding path program 1 times [2023-01-28 07:57:07,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:07,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749295908] [2023-01-28 07:57:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:07,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:07,531 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 07:57:07,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:07,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749295908] [2023-01-28 07:57:07,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749295908] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:57:07,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:57:07,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 07:57:07,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159761484] [2023-01-28 07:57:07,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:57:07,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:57:07,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:07,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:57:07,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:57:07,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 310 [2023-01-28 07:57:07,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:07,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:07,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 310 [2023-01-28 07:57:07,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:08,245 INFO L130 PetriNetUnfolder]: 9204/15516 cut-off events. [2023-01-28 07:57:08,245 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2023-01-28 07:57:08,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30400 conditions, 15516 events. 9204/15516 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 115573 event pairs, 4766 based on Foata normal form. 0/13319 useless extension candidates. Maximal degree in co-relation 30354. Up to 10034 conditions per place. [2023-01-28 07:57:08,290 INFO L137 encePairwiseOnDemand]: 293/310 looper letters, 87 selfloop transitions, 10 changer transitions 1/110 dead transitions. [2023-01-28 07:57:08,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 110 transitions, 448 flow [2023-01-28 07:57:08,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:57:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:57:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-01-28 07:57:08,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2023-01-28 07:57:08,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-01-28 07:57:08,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-01-28 07:57:08,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:08,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-01-28 07:57:08,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:08,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:08,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:08,295 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 168 flow. Second operand 3 states and 490 transitions. [2023-01-28 07:57:08,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 110 transitions, 448 flow [2023-01-28 07:57:08,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:57:08,297 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 246 flow [2023-01-28 07:57:08,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2023-01-28 07:57:08,298 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 6 predicate places. [2023-01-28 07:57:08,298 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 246 flow [2023-01-28 07:57:08,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:08,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:08,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:57:08,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 07:57:08,298 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 07:57:08,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:08,299 INFO L85 PathProgramCache]: Analyzing trace with hash 346016475, now seen corresponding path program 1 times [2023-01-28 07:57:08,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:08,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836533558] [2023-01-28 07:57:08,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:08,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:08,323 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 07:57:08,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:08,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836533558] [2023-01-28 07:57:08,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836533558] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:57:08,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743599114] [2023-01-28 07:57:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:08,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:57:08,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:57:08,325 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 07:57:08,355 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 07:57:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:08,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:57:08,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:57:08,399 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 07:57:08,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:57:08,413 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 07:57:08,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743599114] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:57:08,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:57:08,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:57:08,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502577921] [2023-01-28 07:57:08,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:57:08,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:57:08,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:08,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:57:08,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:57:08,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 310 [2023-01-28 07:57:08,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 144.57142857142858) internal successors, (1012), 7 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:08,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:08,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 310 [2023-01-28 07:57:08,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:08,476 INFO L130 PetriNetUnfolder]: 133/251 cut-off events. [2023-01-28 07:57:08,476 INFO L131 PetriNetUnfolder]: For 83/102 co-relation queries the response was YES. [2023-01-28 07:57:08,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 251 events. 133/251 cut-off events. For 83/102 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1006 event pairs, 6 based on Foata normal form. 37/284 useless extension candidates. Maximal degree in co-relation 587. Up to 171 conditions per place. [2023-01-28 07:57:08,476 INFO L137 encePairwiseOnDemand]: 307/310 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2023-01-28 07:57:08,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 154 flow [2023-01-28 07:57:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 07:57:08,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 07:57:08,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 741 transitions. [2023-01-28 07:57:08,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780645161290323 [2023-01-28 07:57:08,478 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 741 transitions. [2023-01-28 07:57:08,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 741 transitions. [2023-01-28 07:57:08,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:08,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 741 transitions. [2023-01-28 07:57:08,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:08,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:08,482 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:08,482 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 246 flow. Second operand 5 states and 741 transitions. [2023-01-28 07:57:08,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 154 flow [2023-01-28 07:57:08,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 07:57:08,482 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2023-01-28 07:57:08,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, 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=5, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2023-01-28 07:57:08,483 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -39 predicate places. [2023-01-28 07:57:08,483 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2023-01-28 07:57:08,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.57142857142858) internal successors, (1012), 7 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:08,484 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 07:57:08,484 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-28 07:57:08,484 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-28 07:57:08,484 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-28 07:57:08,491 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 07:57:08,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-01-28 07:57:08,689 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-28 07:57:08,689 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 07:57:08,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 185 transitions, 388 flow [2023-01-28 07:57:08,707 INFO L130 PetriNetUnfolder]: 57/319 cut-off events. [2023-01-28 07:57:08,708 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:57:08,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 319 events. 57/319 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1201 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 195. Up to 9 conditions per place. [2023-01-28 07:57:08,708 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 185 transitions, 388 flow [2023-01-28 07:57:08,709 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 185 transitions, 388 flow [2023-01-28 07:57:08,710 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:08,710 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 185 transitions, 388 flow [2023-01-28 07:57:08,710 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 185 transitions, 388 flow [2023-01-28 07:57:08,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 185 transitions, 388 flow [2023-01-28 07:57:08,725 INFO L130 PetriNetUnfolder]: 57/319 cut-off events. [2023-01-28 07:57:08,726 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:57:08,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 319 events. 57/319 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1201 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 195. Up to 9 conditions per place. [2023-01-28 07:57:08,732 INFO L119 LiptonReduction]: Number of co-enabled transitions 16020 [2023-01-28 07:57:10,739 INFO L134 LiptonReduction]: Checked pairs total: 46004 [2023-01-28 07:57:10,739 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-01-28 07:57:10,741 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:57:10,741 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;@5403e8a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:10,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:57:10,745 INFO L130 PetriNetUnfolder]: 29/104 cut-off events. [2023-01-28 07:57:10,746 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 07:57:10,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:10,746 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 07:57:10,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:57:10,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:10,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1502892358, now seen corresponding path program 1 times [2023-01-28 07:57:10,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:10,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750010483] [2023-01-28 07:57:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:10,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:57:10,767 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:57:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:57:10,785 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:57:10,786 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:57:10,786 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:57:10,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 07:57:10,786 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:57:10,786 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:57:10,787 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:57:10,787 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 07:57:10,812 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 07:57:10,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 232 transitions, 494 flow [2023-01-28 07:57:10,841 INFO L130 PetriNetUnfolder]: 86/476 cut-off events. [2023-01-28 07:57:10,843 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:57:10,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 476 events. 86/476 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1887 event pairs, 1 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 327. Up to 16 conditions per place. [2023-01-28 07:57:10,844 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 232 transitions, 494 flow [2023-01-28 07:57:10,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 232 transitions, 494 flow [2023-01-28 07:57:10,846 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:10,846 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 232 transitions, 494 flow [2023-01-28 07:57:10,846 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 232 transitions, 494 flow [2023-01-28 07:57:10,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 232 transitions, 494 flow [2023-01-28 07:57:10,872 INFO L130 PetriNetUnfolder]: 86/476 cut-off events. [2023-01-28 07:57:10,872 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:57:10,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 476 events. 86/476 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1887 event pairs, 1 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 327. Up to 16 conditions per place. [2023-01-28 07:57:10,881 INFO L119 LiptonReduction]: Number of co-enabled transitions 30510 [2023-01-28 07:57:12,915 INFO L134 LiptonReduction]: Checked pairs total: 92347 [2023-01-28 07:57:12,915 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-01-28 07:57:12,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:57:12,919 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;@5403e8a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:12,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-28 07:57:12,920 INFO L130 PetriNetUnfolder]: 1/16 cut-off events. [2023-01-28 07:57:12,920 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:12,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:12,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 07:57:12,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 07:57:12,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:12,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1480965945, now seen corresponding path program 1 times [2023-01-28 07:57:12,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:12,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535870869] [2023-01-28 07:57:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:12,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:12,964 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 07:57:12,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:12,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535870869] [2023-01-28 07:57:12,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535870869] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:57:12,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:57:12,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:57:12,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736587087] [2023-01-28 07:57:12,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:57:12,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:57:12,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:12,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:57:12,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:57:12,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 389 [2023-01-28 07:57:12,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 124 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:12,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:12,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 389 [2023-01-28 07:57:12,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:20,573 INFO L130 PetriNetUnfolder]: 95946/144583 cut-off events. [2023-01-28 07:57:20,573 INFO L131 PetriNetUnfolder]: For 1715/1715 co-relation queries the response was YES. [2023-01-28 07:57:20,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276062 conditions, 144583 events. 95946/144583 cut-off events. For 1715/1715 co-relation queries the response was YES. Maximal size of possible extension queue 4007. Compared 1228550 event pairs, 56969 based on Foata normal form. 22989/145036 useless extension candidates. Maximal degree in co-relation 18306. Up to 130015 conditions per place. [2023-01-28 07:57:21,398 INFO L137 encePairwiseOnDemand]: 352/389 looper letters, 73 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2023-01-28 07:57:21,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 105 transitions, 390 flow [2023-01-28 07:57:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:57:21,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:57:21,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-01-28 07:57:21,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561268209083119 [2023-01-28 07:57:21,400 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-01-28 07:57:21,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-01-28 07:57:21,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:21,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-01-28 07:57:21,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:21,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:21,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:21,403 INFO L175 Difference]: Start difference. First operand has 91 places, 124 transitions, 278 flow. Second operand 3 states and 649 transitions. [2023-01-28 07:57:21,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 105 transitions, 390 flow [2023-01-28 07:57:21,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 105 transitions, 390 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:57:21,406 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 222 flow [2023-01-28 07:57:21,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2023-01-28 07:57:21,407 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 3 predicate places. [2023-01-28 07:57:21,407 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 222 flow [2023-01-28 07:57:21,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:21,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:21,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:57:21,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 07:57:21,407 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 07:57:21,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:21,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1247976831, now seen corresponding path program 1 times [2023-01-28 07:57:21,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:21,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749302206] [2023-01-28 07:57:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:21,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:21,432 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 07:57:21,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:21,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749302206] [2023-01-28 07:57:21,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749302206] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:57:21,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:57:21,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 07:57:21,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876253952] [2023-01-28 07:57:21,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:57:21,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:57:21,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:21,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:57:21,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:57:21,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 389 [2023-01-28 07:57:21,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:21,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:21,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 389 [2023-01-28 07:57:21,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:43,015 INFO L130 PetriNetUnfolder]: 293839/418810 cut-off events. [2023-01-28 07:57:43,016 INFO L131 PetriNetUnfolder]: For 4232/4232 co-relation queries the response was YES. [2023-01-28 07:57:43,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829297 conditions, 418810 events. 293839/418810 cut-off events. For 4232/4232 co-relation queries the response was YES. Maximal size of possible extension queue 10425. Compared 3466178 event pairs, 134570 based on Foata normal form. 0/368918 useless extension candidates. Maximal degree in co-relation 829240. Up to 259359 conditions per place. [2023-01-28 07:57:44,661 INFO L137 encePairwiseOnDemand]: 368/389 looper letters, 122 selfloop transitions, 12 changer transitions 1/148 dead transitions. [2023-01-28 07:57:44,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 148 transitions, 613 flow [2023-01-28 07:57:44,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:57:44,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:57:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 613 transitions. [2023-01-28 07:57:44,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252784918594687 [2023-01-28 07:57:44,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 613 transitions. [2023-01-28 07:57:44,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 613 transitions. [2023-01-28 07:57:44,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:44,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 613 transitions. [2023-01-28 07:57:44,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:44,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:44,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:44,670 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 222 flow. Second operand 3 states and 613 transitions. [2023-01-28 07:57:44,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 148 transitions, 613 flow [2023-01-28 07:57:44,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 148 transitions, 611 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:57:44,683 INFO L231 Difference]: Finished difference. Result has 97 places, 100 transitions, 318 flow [2023-01-28 07:57:44,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=97, PETRI_TRANSITIONS=100} [2023-01-28 07:57:44,684 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 6 predicate places. [2023-01-28 07:57:44,684 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 100 transitions, 318 flow [2023-01-28 07:57:44,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:44,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:44,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:57:44,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 07:57:44,685 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 07:57:44,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:44,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1479957955, now seen corresponding path program 1 times [2023-01-28 07:57:44,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:44,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039997186] [2023-01-28 07:57:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:44,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:44,716 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 07:57:44,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:44,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039997186] [2023-01-28 07:57:44,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039997186] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:57:44,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633155035] [2023-01-28 07:57:44,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:44,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:57:44,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:57:44,721 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 07:57:44,782 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 07:57:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:44,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:57:44,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:57:44,855 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 07:57:44,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:57:44,877 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 07:57:44,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633155035] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:57:44,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:57:44,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:57:44,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531653083] [2023-01-28 07:57:44,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:57:44,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:57:44,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:44,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:57:44,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:57:44,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 389 [2023-01-28 07:57:44,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 100 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 179.71428571428572) internal successors, (1258), 7 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:44,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:44,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 389 [2023-01-28 07:57:44,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:57:45,057 INFO L130 PetriNetUnfolder]: 1986/3015 cut-off events. [2023-01-28 07:57:45,057 INFO L131 PetriNetUnfolder]: For 457/457 co-relation queries the response was YES. [2023-01-28 07:57:45,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6459 conditions, 3015 events. 1986/3015 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15195 event pairs, 75 based on Foata normal form. 322/3291 useless extension candidates. Maximal degree in co-relation 6446. Up to 1932 conditions per place. [2023-01-28 07:57:45,062 INFO L137 encePairwiseOnDemand]: 386/389 looper letters, 0 selfloop transitions, 0 changer transitions 60/60 dead transitions. [2023-01-28 07:57:45,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 265 flow [2023-01-28 07:57:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:57:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:57:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1121 transitions. [2023-01-28 07:57:45,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48029134532990575 [2023-01-28 07:57:45,065 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1121 transitions. [2023-01-28 07:57:45,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1121 transitions. [2023-01-28 07:57:45,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:57:45,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1121 transitions. [2023-01-28 07:57:45,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.83333333333334) internal successors, (1121), 6 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:45,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 389.0) internal successors, (2723), 7 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:45,070 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 389.0) internal successors, (2723), 7 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:45,070 INFO L175 Difference]: Start difference. First operand has 97 places, 100 transitions, 318 flow. Second operand 6 states and 1121 transitions. [2023-01-28 07:57:45,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 265 flow [2023-01-28 07:57:45,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 60 transitions, 261 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-28 07:57:45,071 INFO L231 Difference]: Finished difference. Result has 41 places, 0 transitions, 0 flow [2023-01-28 07:57:45,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=41, PETRI_TRANSITIONS=0} [2023-01-28 07:57:45,072 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -50 predicate places. [2023-01-28 07:57:45,072 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 0 transitions, 0 flow [2023-01-28 07:57:45,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 179.71428571428572) internal successors, (1258), 7 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:45,072 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-01-28 07:57:45,072 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-28 07:57:45,073 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-28 07:57:45,073 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-28 07:57:45,073 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-28 07:57:45,092 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 07:57:45,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:57:45,277 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-28 07:57:45,278 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 07:57:45,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 232 transitions, 494 flow [2023-01-28 07:57:45,307 INFO L130 PetriNetUnfolder]: 86/476 cut-off events. [2023-01-28 07:57:45,307 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:57:45,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 476 events. 86/476 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1887 event pairs, 1 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 327. Up to 16 conditions per place. [2023-01-28 07:57:45,311 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 232 transitions, 494 flow [2023-01-28 07:57:45,313 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 232 transitions, 494 flow [2023-01-28 07:57:45,313 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:45,313 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 232 transitions, 494 flow [2023-01-28 07:57:45,313 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 232 transitions, 494 flow [2023-01-28 07:57:45,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 232 transitions, 494 flow [2023-01-28 07:57:45,339 INFO L130 PetriNetUnfolder]: 86/476 cut-off events. [2023-01-28 07:57:45,339 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:57:45,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 476 events. 86/476 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1887 event pairs, 1 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 327. Up to 16 conditions per place. [2023-01-28 07:57:45,348 INFO L119 LiptonReduction]: Number of co-enabled transitions 30510 [2023-01-28 07:57:47,391 INFO L134 LiptonReduction]: Checked pairs total: 80675 [2023-01-28 07:57:47,391 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-01-28 07:57:47,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:57:47,393 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;@5403e8a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:47,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:57:47,400 INFO L130 PetriNetUnfolder]: 49/169 cut-off events. [2023-01-28 07:57:47,400 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 07:57:47,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:47,400 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 07:57:47,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:57:47,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:47,400 INFO L85 PathProgramCache]: Analyzing trace with hash 463521866, now seen corresponding path program 1 times [2023-01-28 07:57:47,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:47,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895966203] [2023-01-28 07:57:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:47,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:57:47,423 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:57:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:57:47,443 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:57:47,443 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:57:47,443 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:57:47,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 07:57:47,443 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:57:47,445 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:57:47,445 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:57:47,445 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 07:57:47,464 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 07:57:47,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 279 transitions, 602 flow [2023-01-28 07:57:47,518 INFO L130 PetriNetUnfolder]: 127/697 cut-off events. [2023-01-28 07:57:47,518 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:57:47,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 697 events. 127/697 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2947 event pairs, 6 based on Foata normal form. 0/561 useless extension candidates. Maximal degree in co-relation 496. Up to 32 conditions per place. [2023-01-28 07:57:47,524 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 279 transitions, 602 flow [2023-01-28 07:57:47,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 279 transitions, 602 flow [2023-01-28 07:57:47,529 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:57:47,529 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 279 transitions, 602 flow [2023-01-28 07:57:47,529 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 279 transitions, 602 flow [2023-01-28 07:57:47,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 279 transitions, 602 flow [2023-01-28 07:57:47,578 INFO L130 PetriNetUnfolder]: 127/697 cut-off events. [2023-01-28 07:57:47,584 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:57:47,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 697 events. 127/697 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2947 event pairs, 6 based on Foata normal form. 0/561 useless extension candidates. Maximal degree in co-relation 496. Up to 32 conditions per place. [2023-01-28 07:57:47,607 INFO L119 LiptonReduction]: Number of co-enabled transitions 49320 [2023-01-28 07:57:49,495 INFO L134 LiptonReduction]: Checked pairs total: 159687 [2023-01-28 07:57:49,495 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-01-28 07:57:49,496 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:57:49,496 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;@5403e8a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:57:49,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-28 07:57:49,498 INFO L130 PetriNetUnfolder]: 3/18 cut-off events. [2023-01-28 07:57:49,498 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:57:49,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:57:49,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 07:57:49,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-28 07:57:49,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:57:49,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2123709681, now seen corresponding path program 1 times [2023-01-28 07:57:49,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:57:49,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543487843] [2023-01-28 07:57:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:57:49,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:57:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:57:49,515 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 07:57:49,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:57:49,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543487843] [2023-01-28 07:57:49,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543487843] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:57:49,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:57:49,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:57:49,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869624686] [2023-01-28 07:57:49,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:57:49,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:57:49,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:57:49,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:57:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:57:49,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 470 [2023-01-28 07:57:49,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 157 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:57:49,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:57:49,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 470 [2023-01-28 07:57:49,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand