/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/stack_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 23:51:24,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 23:51:24,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 23:51:24,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 23:51:24,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 23:51:24,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 23:51:24,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 23:51:24,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 23:51:24,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 23:51:24,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 23:51:24,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 23:51:24,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 23:51:24,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 23:51:24,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 23:51:24,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 23:51:24,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 23:51:24,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 23:51:24,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 23:51:24,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 23:51:24,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 23:51:24,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 23:51:24,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 23:51:24,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 23:51:24,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 23:51:24,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 23:51:24,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 23:51:24,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 23:51:24,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 23:51:24,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 23:51:24,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 23:51:24,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 23:51:24,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 23:51:24,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 23:51:24,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 23:51:24,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 23:51:24,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 23:51:24,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 23:51:24,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 23:51:24,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 23:51:24,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 23:51:24,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 23:51:24,266 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 [2023-01-27 23:51:24,290 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 23:51:24,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 23:51:24,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 23:51:24,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 23:51:24,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 23:51:24,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 23:51:24,292 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 23:51:24,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 23:51:24,292 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 23:51:24,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 23:51:24,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 23:51:24,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 23:51:24,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 23:51:24,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 23:51:24,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 23:51:24,293 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 23:51:24,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 23:51:24,293 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 23:51:24,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 23:51:24,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 23:51:24,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 23:51:24,293 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 23:51:24,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 23:51:24,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:51:24,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 23:51:24,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 23:51:24,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 23:51:24,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 23:51:24,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 23:51:24,294 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 23:51:24,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 23:51:24,294 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-27 23:51:24,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 23:51:24,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 23:51:24,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 23:51:24,514 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 23:51:24,514 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 23:51:24,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-1.i [2023-01-27 23:51:25,458 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 23:51:25,668 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 23:51:25,669 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i [2023-01-27 23:51:25,676 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b1a32072/a9655581bb554c12b1f235eebe822510/FLAG05e7a4e09 [2023-01-27 23:51:25,685 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b1a32072/a9655581bb554c12b1f235eebe822510 [2023-01-27 23:51:25,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 23:51:25,687 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 23:51:25,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 23:51:25,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 23:51:25,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 23:51:25,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:51:25" (1/1) ... [2023-01-27 23:51:25,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a5743fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:51:25, skipping insertion in model container [2023-01-27 23:51:25,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:51:25" (1/1) ... [2023-01-27 23:51:25,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 23:51:25,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 23:51:26,077 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-01-27 23:51:26,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:51:26,115 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 23:51:26,154 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-01-27 23:51:26,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:51:26,197 INFO L208 MainTranslator]: Completed translation [2023-01-27 23:51:26,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:51:26 WrapperNode [2023-01-27 23:51:26,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 23:51:26,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 23:51:26,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 23:51:26,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 23:51:26,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:51:26" (1/1) ... [2023-01-27 23:51:26,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:51:26" (1/1) ... [2023-01-27 23:51:26,229 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 156 [2023-01-27 23:51:26,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 23:51:26,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 23:51:26,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 23:51:26,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 23:51:26,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:51:26" (1/1) ... [2023-01-27 23:51:26,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:51:26" (1/1) ... [2023-01-27 23:51:26,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:51:26" (1/1) ... [2023-01-27 23:51:26,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:51:26" (1/1) ... [2023-01-27 23:51:26,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:51:26" (1/1) ... [2023-01-27 23:51:26,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:51:26" (1/1) ... [2023-01-27 23:51:26,247 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:51:26" (1/1) ... [2023-01-27 23:51:26,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:51:26" (1/1) ... [2023-01-27 23:51:26,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 23:51:26,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 23:51:26,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 23:51:26,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 23:51:26,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:51:26" (1/1) ... [2023-01-27 23:51:26,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:51:26,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:51:26,283 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) [2023-01-27 23:51:26,284 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 [2023-01-27 23:51:26,324 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-01-27 23:51:26,324 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-01-27 23:51:26,324 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-01-27 23:51:26,324 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-01-27 23:51:26,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 23:51:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 23:51:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 23:51:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 23:51:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 23:51:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 23:51:26,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 23:51:26,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 23:51:26,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 23:51:26,329 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 23:51:26,453 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 23:51:26,454 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 23:51:26,689 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 23:51:26,694 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 23:51:26,695 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 23:51:26,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:51:26 BoogieIcfgContainer [2023-01-27 23:51:26,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 23:51:26,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 23:51:26,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 23:51:26,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 23:51:26,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:51:25" (1/3) ... [2023-01-27 23:51:26,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62641395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:51:26, skipping insertion in model container [2023-01-27 23:51:26,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:51:26" (2/3) ... [2023-01-27 23:51:26,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62641395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:51:26, skipping insertion in model container [2023-01-27 23:51:26,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:51:26" (3/3) ... [2023-01-27 23:51:26,701 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2023-01-27 23:51:26,712 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 23:51:26,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-27 23:51:26,712 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 23:51:26,767 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 23:51:26,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 158 transitions, 332 flow [2023-01-27 23:51:26,832 INFO L130 PetriNetUnfolder]: 10/156 cut-off events. [2023-01-27 23:51:26,832 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:51:26,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 156 events. 10/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 373 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-01-27 23:51:26,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 158 transitions, 332 flow [2023-01-27 23:51:26,849 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 147 transitions, 303 flow [2023-01-27 23:51:26,851 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 23:51:26,856 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 147 transitions, 303 flow [2023-01-27 23:51:26,858 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 147 transitions, 303 flow [2023-01-27 23:51:26,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 147 transitions, 303 flow [2023-01-27 23:51:26,884 INFO L130 PetriNetUnfolder]: 10/147 cut-off events. [2023-01-27 23:51:26,884 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 23:51:26,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 147 events. 10/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 302 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-01-27 23:51:26,893 INFO L119 LiptonReduction]: Number of co-enabled transitions 7334 [2023-01-27 23:51:29,697 INFO L134 LiptonReduction]: Checked pairs total: 10082 [2023-01-27 23:51:29,698 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-01-27 23:51:29,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 23:51:29,710 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;@7074ec63, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 23:51:29,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 23:51:29,713 INFO L130 PetriNetUnfolder]: 0/13 cut-off events. [2023-01-27 23:51:29,713 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 23:51:29,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:51:29,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 23:51:29,714 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:51:29,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:51:29,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1684934246, now seen corresponding path program 1 times [2023-01-27 23:51:29,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:51:29,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451525204] [2023-01-27 23:51:29,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:51:29,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:51:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:51:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:51:29,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:51:29,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451525204] [2023-01-27 23:51:29,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451525204] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:51:29,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:51:29,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:51:29,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297761187] [2023-01-27 23:51:29,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:51:29,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:51:29,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:51:29,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:51:29,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:51:29,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 293 [2023-01-27 23:51:29,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:29,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:51:29,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 293 [2023-01-27 23:51:29,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:51:30,107 INFO L130 PetriNetUnfolder]: 845/1382 cut-off events. [2023-01-27 23:51:30,107 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2023-01-27 23:51:30,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2798 conditions, 1382 events. 845/1382 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5801 event pairs, 243 based on Foata normal form. 0/1128 useless extension candidates. Maximal degree in co-relation 2590. Up to 777 conditions per place. [2023-01-27 23:51:30,116 INFO L137 encePairwiseOnDemand]: 288/293 looper letters, 55 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-01-27 23:51:30,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 253 flow [2023-01-27 23:51:30,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:51:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:51:30,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-01-27 23:51:30,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358361774744027 [2023-01-27 23:51:30,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-01-27 23:51:30,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-01-27 23:51:30,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:51:30,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-01-27 23:51:30,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:30,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:30,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:30,139 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 471 transitions. [2023-01-27 23:51:30,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 253 flow [2023-01-27 23:51:30,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 60 transitions, 245 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-27 23:51:30,143 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 100 flow [2023-01-27 23:51:30,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-01-27 23:51:30,146 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-01-27 23:51:30,146 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 100 flow [2023-01-27 23:51:30,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:30,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:51:30,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:51:30,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 23:51:30,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:51:30,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:51:30,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1024065199, now seen corresponding path program 1 times [2023-01-27 23:51:30,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:51:30,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927523551] [2023-01-27 23:51:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:51:30,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:51:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:51:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:51:30,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:51:30,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927523551] [2023-01-27 23:51:30,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927523551] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:51:30,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:51:30,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:51:30,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519744085] [2023-01-27 23:51:30,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:51:30,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:51:30,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:51:30,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:51:30,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:51:30,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 293 [2023-01-27 23:51:30,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:30,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:51:30,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 293 [2023-01-27 23:51:30,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:51:30,385 INFO L130 PetriNetUnfolder]: 987/1600 cut-off events. [2023-01-27 23:51:30,386 INFO L131 PetriNetUnfolder]: For 161/161 co-relation queries the response was YES. [2023-01-27 23:51:30,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3491 conditions, 1600 events. 987/1600 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6550 event pairs, 449 based on Foata normal form. 0/1334 useless extension candidates. Maximal degree in co-relation 3078. Up to 1301 conditions per place. [2023-01-27 23:51:30,392 INFO L137 encePairwiseOnDemand]: 290/293 looper letters, 50 selfloop transitions, 2 changer transitions 3/55 dead transitions. [2023-01-27 23:51:30,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 55 transitions, 255 flow [2023-01-27 23:51:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:51:30,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:51:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-01-27 23:51:30,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483503981797497 [2023-01-27 23:51:30,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-01-27 23:51:30,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-01-27 23:51:30,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:51:30,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-01-27 23:51:30,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:30,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:30,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:30,398 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 100 flow. Second operand 3 states and 482 transitions. [2023-01-27 23:51:30,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 55 transitions, 255 flow [2023-01-27 23:51:30,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 245 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 23:51:30,400 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 104 flow [2023-01-27 23:51:30,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-01-27 23:51:30,401 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-01-27 23:51:30,401 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 104 flow [2023-01-27 23:51:30,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:30,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:51:30,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:51:30,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 23:51:30,401 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:51:30,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:51:30,402 INFO L85 PathProgramCache]: Analyzing trace with hash 794946535, now seen corresponding path program 1 times [2023-01-27 23:51:30,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:51:30,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342117517] [2023-01-27 23:51:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:51:30,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:51:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:51:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:51:30,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:51:30,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342117517] [2023-01-27 23:51:30,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342117517] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:51:30,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:51:30,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:51:30,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81798237] [2023-01-27 23:51:30,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:51:30,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:51:30,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:51:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:51:30,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:51:30,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 293 [2023-01-27 23:51:30,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:30,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:51:30,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 293 [2023-01-27 23:51:30,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:51:30,628 INFO L130 PetriNetUnfolder]: 942/1555 cut-off events. [2023-01-27 23:51:30,628 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-01-27 23:51:30,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3440 conditions, 1555 events. 942/1555 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6593 event pairs, 653 based on Foata normal form. 50/1437 useless extension candidates. Maximal degree in co-relation 3052. Up to 1389 conditions per place. [2023-01-27 23:51:30,635 INFO L137 encePairwiseOnDemand]: 290/293 looper letters, 51 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-01-27 23:51:30,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 266 flow [2023-01-27 23:51:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:51:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:51:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-01-27 23:51:30,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381114903299203 [2023-01-27 23:51:30,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-01-27 23:51:30,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-01-27 23:51:30,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:51:30,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-01-27 23:51:30,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:30,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:30,641 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:30,641 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 104 flow. Second operand 3 states and 473 transitions. [2023-01-27 23:51:30,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 266 flow [2023-01-27 23:51:30,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:51:30,642 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 122 flow [2023-01-27 23:51:30,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-01-27 23:51:30,643 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2023-01-27 23:51:30,643 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 122 flow [2023-01-27 23:51:30,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:30,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:51:30,644 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:51:30,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 23:51:30,644 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:51:30,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:51:30,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1768410213, now seen corresponding path program 1 times [2023-01-27 23:51:30,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:51:30,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581885419] [2023-01-27 23:51:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:51:30,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:51:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:51:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:51:30,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:51:30,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581885419] [2023-01-27 23:51:30,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581885419] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:51:30,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81905980] [2023-01-27 23:51:30,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:51:30,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:51:30,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:51:30,738 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) [2023-01-27 23:51:30,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 23:51:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:51:30,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 23:51:30,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:51:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:51:30,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:51:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:51:30,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81905980] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:51:30,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:51:30,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-01-27 23:51:30,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880706416] [2023-01-27 23:51:30,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:51:30,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 23:51:30,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:51:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 23:51:30,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-27 23:51:30,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 293 [2023-01-27 23:51:30,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 122 flow. Second operand has 10 states, 10 states have (on average 138.6) internal successors, (1386), 10 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:30,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:51:30,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 293 [2023-01-27 23:51:30,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:51:31,258 INFO L130 PetriNetUnfolder]: 1815/3000 cut-off events. [2023-01-27 23:51:31,258 INFO L131 PetriNetUnfolder]: For 1075/1075 co-relation queries the response was YES. [2023-01-27 23:51:31,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7073 conditions, 3000 events. 1815/3000 cut-off events. For 1075/1075 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14146 event pairs, 349 based on Foata normal form. 48/2736 useless extension candidates. Maximal degree in co-relation 6486. Up to 844 conditions per place. [2023-01-27 23:51:31,271 INFO L137 encePairwiseOnDemand]: 287/293 looper letters, 164 selfloop transitions, 22 changer transitions 0/187 dead transitions. [2023-01-27 23:51:31,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 187 transitions, 900 flow [2023-01-27 23:51:31,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 23:51:31,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 23:51:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1535 transitions. [2023-01-27 23:51:31,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238907849829352 [2023-01-27 23:51:31,274 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1535 transitions. [2023-01-27 23:51:31,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1535 transitions. [2023-01-27 23:51:31,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:51:31,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1535 transitions. [2023-01-27 23:51:31,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 153.5) internal successors, (1535), 10 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:31,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 293.0) internal successors, (3223), 11 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:31,282 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 293.0) internal successors, (3223), 11 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:31,282 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 122 flow. Second operand 10 states and 1535 transitions. [2023-01-27 23:51:31,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 187 transitions, 900 flow [2023-01-27 23:51:31,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 187 transitions, 887 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:51:31,287 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 280 flow [2023-01-27 23:51:31,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=280, PETRI_PLACES=51, PETRI_TRANSITIONS=56} [2023-01-27 23:51:31,288 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-01-27 23:51:31,288 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 280 flow [2023-01-27 23:51:31,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.6) internal successors, (1386), 10 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:31,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:51:31,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:51:31,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 23:51:31,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:51:31,494 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:51:31,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:51:31,494 INFO L85 PathProgramCache]: Analyzing trace with hash 362891190, now seen corresponding path program 1 times [2023-01-27 23:51:31,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:51:31,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998307494] [2023-01-27 23:51:31,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:51:31,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:51:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:51:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:51:31,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:51:31,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998307494] [2023-01-27 23:51:31,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998307494] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:51:31,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:51:31,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 23:51:31,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526343239] [2023-01-27 23:51:31,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:51:31,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:51:31,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:51:31,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:51:31,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:51:31,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 293 [2023-01-27 23:51:31,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:31,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:51:31,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 293 [2023-01-27 23:51:31,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:51:31,645 INFO L130 PetriNetUnfolder]: 613/1142 cut-off events. [2023-01-27 23:51:31,646 INFO L131 PetriNetUnfolder]: For 302/302 co-relation queries the response was YES. [2023-01-27 23:51:31,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 1142 events. 613/1142 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4886 event pairs, 98 based on Foata normal form. 0/1062 useless extension candidates. Maximal degree in co-relation 1750. Up to 861 conditions per place. [2023-01-27 23:51:31,650 INFO L137 encePairwiseOnDemand]: 288/293 looper letters, 49 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-01-27 23:51:31,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 335 flow [2023-01-27 23:51:31,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:51:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:51:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-01-27 23:51:31,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130830489192264 [2023-01-27 23:51:31,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-01-27 23:51:31,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-01-27 23:51:31,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:51:31,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-01-27 23:51:31,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:31,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:31,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:31,654 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 280 flow. Second operand 3 states and 451 transitions. [2023-01-27 23:51:31,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 335 flow [2023-01-27 23:51:31,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 323 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-01-27 23:51:31,657 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2023-01-27 23:51:31,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-01-27 23:51:31,659 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-01-27 23:51:31,659 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2023-01-27 23:51:31,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:31,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:51:31,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:51:31,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 23:51:31,660 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:51:31,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:51:31,660 INFO L85 PathProgramCache]: Analyzing trace with hash 647657202, now seen corresponding path program 1 times [2023-01-27 23:51:31,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:51:31,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840819141] [2023-01-27 23:51:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:51:31,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:51:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:51:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:51:31,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:51:31,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840819141] [2023-01-27 23:51:31,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840819141] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:51:31,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:51:31,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 23:51:31,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686564997] [2023-01-27 23:51:31,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:51:31,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:51:31,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:51:31,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:51:31,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:51:31,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 293 [2023-01-27 23:51:31,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:31,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:51:31,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 293 [2023-01-27 23:51:31,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:51:31,895 INFO L130 PetriNetUnfolder]: 727/1350 cut-off events. [2023-01-27 23:51:31,895 INFO L131 PetriNetUnfolder]: For 423/423 co-relation queries the response was YES. [2023-01-27 23:51:31,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3420 conditions, 1350 events. 727/1350 cut-off events. For 423/423 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5723 event pairs, 207 based on Foata normal form. 12/1362 useless extension candidates. Maximal degree in co-relation 2672. Up to 529 conditions per place. [2023-01-27 23:51:31,900 INFO L137 encePairwiseOnDemand]: 287/293 looper letters, 80 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2023-01-27 23:51:31,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 92 transitions, 526 flow [2023-01-27 23:51:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 23:51:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 23:51:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 759 transitions. [2023-01-27 23:51:31,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180887372013652 [2023-01-27 23:51:31,902 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 759 transitions. [2023-01-27 23:51:31,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 759 transitions. [2023-01-27 23:51:31,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:51:31,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 759 transitions. [2023-01-27 23:51:31,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.8) internal successors, (759), 5 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:31,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:31,906 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:31,906 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 5 states and 759 transitions. [2023-01-27 23:51:31,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 92 transitions, 526 flow [2023-01-27 23:51:31,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 92 transitions, 513 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:51:31,909 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 258 flow [2023-01-27 23:51:31,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-01-27 23:51:31,909 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-01-27 23:51:31,909 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 258 flow [2023-01-27 23:51:31,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:31,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:51:31,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:51:31,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 23:51:31,910 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:51:31,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:51:31,910 INFO L85 PathProgramCache]: Analyzing trace with hash 461657146, now seen corresponding path program 1 times [2023-01-27 23:51:31,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:51:31,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924520268] [2023-01-27 23:51:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:51:31,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:51:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:51:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:51:32,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:51:32,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924520268] [2023-01-27 23:51:32,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924520268] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:51:32,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:51:32,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-01-27 23:51:32,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377192380] [2023-01-27 23:51:32,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:51:32,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 23:51:32,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:51:32,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 23:51:32,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-01-27 23:51:32,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 293 [2023-01-27 23:51:32,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 258 flow. Second operand has 11 states, 11 states have (on average 111.0) internal successors, (1221), 11 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:32,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:51:32,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 293 [2023-01-27 23:51:32,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:51:32,908 INFO L130 PetriNetUnfolder]: 1075/1997 cut-off events. [2023-01-27 23:51:32,908 INFO L131 PetriNetUnfolder]: For 1232/1232 co-relation queries the response was YES. [2023-01-27 23:51:32,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5096 conditions, 1997 events. 1075/1997 cut-off events. For 1232/1232 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9740 event pairs, 295 based on Foata normal form. 0/1979 useless extension candidates. Maximal degree in co-relation 3100. Up to 1191 conditions per place. [2023-01-27 23:51:32,916 INFO L137 encePairwiseOnDemand]: 283/293 looper letters, 115 selfloop transitions, 11 changer transitions 3/130 dead transitions. [2023-01-27 23:51:32,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 130 transitions, 796 flow [2023-01-27 23:51:32,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 23:51:32,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 23:51:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1091 transitions. [2023-01-27 23:51:32,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137277208949564 [2023-01-27 23:51:32,919 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1091 transitions. [2023-01-27 23:51:32,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1091 transitions. [2023-01-27 23:51:32,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:51:32,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1091 transitions. [2023-01-27 23:51:32,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.22222222222223) internal successors, (1091), 9 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:32,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:32,924 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:32,924 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 258 flow. Second operand 9 states and 1091 transitions. [2023-01-27 23:51:32,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 130 transitions, 796 flow [2023-01-27 23:51:32,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 130 transitions, 776 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-27 23:51:32,928 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 327 flow [2023-01-27 23:51:32,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=327, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-01-27 23:51:32,928 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 31 predicate places. [2023-01-27 23:51:32,929 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 327 flow [2023-01-27 23:51:32,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 111.0) internal successors, (1221), 11 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:32,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:51:32,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:51:32,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 23:51:32,929 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:51:32,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:51:32,930 INFO L85 PathProgramCache]: Analyzing trace with hash -329150994, now seen corresponding path program 2 times [2023-01-27 23:51:32,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:51:32,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570061409] [2023-01-27 23:51:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:51:32,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:51:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:51:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:51:33,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:51:33,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570061409] [2023-01-27 23:51:33,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570061409] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:51:33,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:51:33,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-01-27 23:51:33,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812964421] [2023-01-27 23:51:33,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:51:33,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 23:51:33,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:51:33,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 23:51:33,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-01-27 23:51:33,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 293 [2023-01-27 23:51:33,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 327 flow. Second operand has 11 states, 11 states have (on average 111.0) internal successors, (1221), 11 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:33,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:51:33,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 293 [2023-01-27 23:51:33,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:51:33,993 INFO L130 PetriNetUnfolder]: 1373/2553 cut-off events. [2023-01-27 23:51:33,993 INFO L131 PetriNetUnfolder]: For 1522/1522 co-relation queries the response was YES. [2023-01-27 23:51:33,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6951 conditions, 2553 events. 1373/2553 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12875 event pairs, 355 based on Foata normal form. 0/2529 useless extension candidates. Maximal degree in co-relation 4514. Up to 1110 conditions per place. [2023-01-27 23:51:34,007 INFO L137 encePairwiseOnDemand]: 284/293 looper letters, 115 selfloop transitions, 16 changer transitions 3/135 dead transitions. [2023-01-27 23:51:34,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 135 transitions, 885 flow [2023-01-27 23:51:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 23:51:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 23:51:34,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1091 transitions. [2023-01-27 23:51:34,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137277208949564 [2023-01-27 23:51:34,009 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1091 transitions. [2023-01-27 23:51:34,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1091 transitions. [2023-01-27 23:51:34,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:51:34,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1091 transitions. [2023-01-27 23:51:34,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.22222222222223) internal successors, (1091), 9 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:34,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:34,014 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:34,015 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 327 flow. Second operand 9 states and 1091 transitions. [2023-01-27 23:51:34,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 135 transitions, 885 flow [2023-01-27 23:51:34,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 135 transitions, 885 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 23:51:34,020 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 419 flow [2023-01-27 23:51:34,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=419, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2023-01-27 23:51:34,020 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 43 predicate places. [2023-01-27 23:51:34,020 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 419 flow [2023-01-27 23:51:34,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 111.0) internal successors, (1221), 11 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:34,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:51:34,021 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:51:34,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 23:51:34,021 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:51:34,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:51:34,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1790252439, now seen corresponding path program 1 times [2023-01-27 23:51:34,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:51:34,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755770678] [2023-01-27 23:51:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:51:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:51:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:51:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 23:51:34,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:51:34,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755770678] [2023-01-27 23:51:34,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755770678] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:51:34,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:51:34,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-27 23:51:34,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746987256] [2023-01-27 23:51:34,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:51:34,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 23:51:34,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:51:34,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 23:51:34,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-01-27 23:51:34,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 293 [2023-01-27 23:51:34,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 419 flow. Second operand has 7 states, 7 states have (on average 129.42857142857142) internal successors, (906), 7 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:34,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:51:34,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 293 [2023-01-27 23:51:34,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:51:34,411 INFO L130 PetriNetUnfolder]: 1393/2595 cut-off events. [2023-01-27 23:51:34,411 INFO L131 PetriNetUnfolder]: For 2184/2184 co-relation queries the response was YES. [2023-01-27 23:51:34,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7489 conditions, 2595 events. 1393/2595 cut-off events. For 2184/2184 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 12907 event pairs, 474 based on Foata normal form. 16/2581 useless extension candidates. Maximal degree in co-relation 5306. Up to 926 conditions per place. [2023-01-27 23:51:34,424 INFO L137 encePairwiseOnDemand]: 285/293 looper letters, 113 selfloop transitions, 20 changer transitions 0/134 dead transitions. [2023-01-27 23:51:34,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 134 transitions, 961 flow [2023-01-27 23:51:34,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 23:51:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 23:51:34,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1237 transitions. [2023-01-27 23:51:34,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46909366704588545 [2023-01-27 23:51:34,427 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1237 transitions. [2023-01-27 23:51:34,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1237 transitions. [2023-01-27 23:51:34,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:51:34,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1237 transitions. [2023-01-27 23:51:34,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 137.44444444444446) internal successors, (1237), 9 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:34,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:34,432 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:34,433 INFO L175 Difference]: Start difference. First operand has 78 places, 64 transitions, 419 flow. Second operand 9 states and 1237 transitions. [2023-01-27 23:51:34,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 134 transitions, 961 flow [2023-01-27 23:51:34,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 134 transitions, 931 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-01-27 23:51:34,439 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 554 flow [2023-01-27 23:51:34,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=554, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2023-01-27 23:51:34,439 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 50 predicate places. [2023-01-27 23:51:34,439 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 554 flow [2023-01-27 23:51:34,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.42857142857142) internal successors, (906), 7 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:51:34,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:51:34,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:51:34,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 23:51:34,440 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 23:51:34,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:51:34,440 INFO L85 PathProgramCache]: Analyzing trace with hash 566216759, now seen corresponding path program 1 times [2023-01-27 23:51:34,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:51:34,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803459511] [2023-01-27 23:51:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:51:34,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:51:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 23:51:34,455 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 23:51:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 23:51:34,518 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 23:51:34,518 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 23:51:34,519 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-01-27 23:51:34,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-01-27 23:51:34,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-01-27 23:51:34,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 23:51:34,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 23:51:34,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 23:51:34,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 23:51:34,520 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:51:34,524 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 23:51:34,524 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 23:51:34,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 11:51:34 BasicIcfg [2023-01-27 23:51:34,552 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 23:51:34,553 INFO L158 Benchmark]: Toolchain (without parser) took 8865.51ms. Allocated memory was 576.7MB in the beginning and 702.5MB in the end (delta: 125.8MB). Free memory was 536.6MB in the beginning and 653.2MB in the end (delta: -116.6MB). Peak memory consumption was 411.9MB. Max. memory is 16.0GB. [2023-01-27 23:51:34,553 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 358.6MB. Free memory is still 306.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 23:51:34,553 INFO L158 Benchmark]: CACSL2BoogieTranslator took 509.26ms. Allocated memory is still 576.7MB. Free memory was 536.1MB in the beginning and 506.1MB in the end (delta: 30.0MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-01-27 23:51:34,553 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.56ms. Allocated memory is still 576.7MB. Free memory was 506.1MB in the beginning and 503.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:51:34,553 INFO L158 Benchmark]: Boogie Preprocessor took 20.19ms. Allocated memory is still 576.7MB. Free memory was 503.6MB in the beginning and 501.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:51:34,554 INFO L158 Benchmark]: RCFGBuilder took 445.68ms. Allocated memory is still 576.7MB. Free memory was 501.6MB in the beginning and 483.7MB in the end (delta: 17.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-01-27 23:51:34,554 INFO L158 Benchmark]: TraceAbstraction took 7854.94ms. Allocated memory was 576.7MB in the beginning and 702.5MB in the end (delta: 125.8MB). Free memory was 483.2MB in the beginning and 653.2MB in the end (delta: -170.0MB). Peak memory consumption was 357.4MB. Max. memory is 16.0GB. [2023-01-27 23:51:34,554 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 358.6MB. Free memory is still 306.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 509.26ms. Allocated memory is still 576.7MB. Free memory was 536.1MB in the beginning and 506.1MB in the end (delta: 30.0MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.56ms. Allocated memory is still 576.7MB. Free memory was 506.1MB in the beginning and 503.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 20.19ms. Allocated memory is still 576.7MB. Free memory was 503.6MB in the beginning and 501.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 445.68ms. Allocated memory is still 576.7MB. Free memory was 501.6MB in the beginning and 483.7MB in the end (delta: 17.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 7854.94ms. Allocated memory was 576.7MB in the beginning and 702.5MB in the end (delta: 125.8MB). Free memory was 483.2MB in the beginning and 653.2MB in the end (delta: -170.0MB). Peak memory consumption was 357.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 144 PlacesBefore, 35 PlacesAfterwards, 147 TransitionsBefore, 33 TransitionsAfterwards, 7334 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 83 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 5 ChoiceCompositions, 135 TotalNumberOfCompositions, 10082 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7371, independent: 7178, independent conditional: 0, independent unconditional: 7178, dependent: 193, dependent conditional: 0, dependent unconditional: 193, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4167, independent: 4119, independent conditional: 0, independent unconditional: 4119, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7371, independent: 3059, independent conditional: 0, independent unconditional: 3059, dependent: 145, dependent conditional: 0, dependent unconditional: 145, unknown: 4167, unknown conditional: 0, unknown unconditional: 4167] , Statistics on independence cache: Total cache size (in pairs): 178, Positive cache size: 162, Positive conditional cache size: 0, Positive unconditional cache size: 162, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 940]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L990] COND TRUE 1 i<(400) [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L960] COND FALSE 1 !(top==(400)) [L967] CALL, EXPR 1 get_top() [L952] 1 return top; [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L990] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 250 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.7s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 504 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 504 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 23 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2054 IncrementalHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23 mSolverCounterUnsat, 0 mSDtfsCounter, 2054 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=554occurred in iteration=9, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 160 ConstructedInterpolants, 0 QuantifiedInterpolants, 1523 SizeOfPredicates, 1 NumberOfNonLiveVariables, 188 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-01-27 23:51:34,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...