/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 06:25:47,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 06:25:47,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 06:25:47,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 06:25:47,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 06:25:47,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 06:25:47,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 06:25:47,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 06:25:47,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 06:25:47,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 06:25:47,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 06:25:47,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 06:25:47,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 06:25:47,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 06:25:47,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 06:25:47,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 06:25:47,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 06:25:47,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 06:25:47,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 06:25:47,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 06:25:47,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 06:25:47,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 06:25:47,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 06:25:47,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 06:25:47,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 06:25:47,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 06:25:47,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 06:25:47,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 06:25:47,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 06:25:47,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 06:25:47,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 06:25:47,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 06:25:47,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 06:25:47,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 06:25:47,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 06:25:47,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 06:25:47,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 06:25:47,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 06:25:47,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 06:25:47,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 06:25:47,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 06:25:47,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 06:25:47,927 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 06:25:47,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 06:25:47,928 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 06:25:47,928 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 06:25:47,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 06:25:47,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 06:25:47,929 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 06:25:47,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 06:25:47,929 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 06:25:47,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 06:25:47,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 06:25:47,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 06:25:47,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 06:25:47,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 06:25:47,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 06:25:47,930 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 06:25:47,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 06:25:47,931 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 06:25:47,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 06:25:47,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 06:25:47,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 06:25:47,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 06:25:47,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 06:25:47,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:25:47,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 06:25:47,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 06:25:47,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 06:25:47,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 06:25:47,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 06:25:47,932 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 06:25:47,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 06:25:47,932 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 06:25:48,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 06:25:48,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 06:25:48,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 06:25:48,144 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 06:25:48,145 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 06:25:48,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-1.i [2023-01-28 06:25:49,185 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 06:25:49,333 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 06:25:49,334 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i [2023-01-28 06:25:49,342 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f9fb6990/56baca97b2d141f48899977dd5a9b2a6/FLAG1604a8d4e [2023-01-28 06:25:49,352 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f9fb6990/56baca97b2d141f48899977dd5a9b2a6 [2023-01-28 06:25:49,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 06:25:49,355 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 06:25:49,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 06:25:49,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 06:25:49,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 06:25:49,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:25:49" (1/1) ... [2023-01-28 06:25:49,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@717ed55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:25:49, skipping insertion in model container [2023-01-28 06:25:49,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:25:49" (1/1) ... [2023-01-28 06:25:49,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 06:25:49,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 06:25:49,648 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_longest-1.i[41530,41543] [2023-01-28 06:25:49,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:25:49,677 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 06:25:49,702 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_longest-1.i[41530,41543] [2023-01-28 06:25:49,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:25:49,747 INFO L208 MainTranslator]: Completed translation [2023-01-28 06:25:49,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:25:49 WrapperNode [2023-01-28 06:25:49,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 06:25:49,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 06:25:49,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 06:25:49,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 06:25:49,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:25:49" (1/1) ... [2023-01-28 06:25:49,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:25:49" (1/1) ... [2023-01-28 06:25:49,781 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 156 [2023-01-28 06:25:49,782 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 06:25:49,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 06:25:49,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 06:25:49,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 06:25:49,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:25:49" (1/1) ... [2023-01-28 06:25:49,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:25:49" (1/1) ... [2023-01-28 06:25:49,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:25:49" (1/1) ... [2023-01-28 06:25:49,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:25:49" (1/1) ... [2023-01-28 06:25:49,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:25:49" (1/1) ... [2023-01-28 06:25:49,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:25:49" (1/1) ... [2023-01-28 06:25:49,802 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:25:49" (1/1) ... [2023-01-28 06:25:49,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:25:49" (1/1) ... [2023-01-28 06:25:49,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 06:25:49,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 06:25:49,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 06:25:49,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 06:25:49,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:25:49" (1/1) ... [2023-01-28 06:25:49,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:25:49,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:25:49,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 06:25:49,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 06:25:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-01-28 06:25:49,869 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-01-28 06:25:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-01-28 06:25:49,869 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-01-28 06:25:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 06:25:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 06:25:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 06:25:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 06:25:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 06:25:49,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 06:25:49,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 06:25:49,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 06:25:49,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 06:25:49,871 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 06:25:49,971 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 06:25:49,972 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 06:25:50,180 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 06:25:50,187 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 06:25:50,187 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 06:25:50,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:25:50 BoogieIcfgContainer [2023-01-28 06:25:50,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 06:25:50,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 06:25:50,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 06:25:50,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 06:25:50,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 06:25:49" (1/3) ... [2023-01-28 06:25:50,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eed801a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:25:50, skipping insertion in model container [2023-01-28 06:25:50,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:25:49" (2/3) ... [2023-01-28 06:25:50,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eed801a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:25:50, skipping insertion in model container [2023-01-28 06:25:50,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:25:50" (3/3) ... [2023-01-28 06:25:50,194 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2023-01-28 06:25:50,210 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 06:25:50,210 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-28 06:25:50,210 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 06:25:50,294 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 06:25:50,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 158 transitions, 332 flow [2023-01-28 06:25:50,376 INFO L130 PetriNetUnfolder]: 10/156 cut-off events. [2023-01-28 06:25:50,376 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:25:50,383 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 8. Compared 386 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. [2023-01-28 06:25:50,383 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 158 transitions, 332 flow [2023-01-28 06:25:50,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 147 transitions, 303 flow [2023-01-28 06:25:50,388 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:25:50,402 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 147 transitions, 303 flow [2023-01-28 06:25:50,404 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 147 transitions, 303 flow [2023-01-28 06:25:50,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 147 transitions, 303 flow [2023-01-28 06:25:50,461 INFO L130 PetriNetUnfolder]: 10/147 cut-off events. [2023-01-28 06:25:50,461 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 06:25:50,462 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 7. Compared 316 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. [2023-01-28 06:25:50,465 INFO L119 LiptonReduction]: Number of co-enabled transitions 7334 [2023-01-28 06:25:53,362 INFO L134 LiptonReduction]: Checked pairs total: 9508 [2023-01-28 06:25:53,363 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-01-28 06:25:53,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:25:53,382 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;@458e20f6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:25:53,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-28 06:25:53,386 INFO L130 PetriNetUnfolder]: 0/14 cut-off events. [2023-01-28 06:25:53,386 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 06:25:53,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:25:53,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-28 06:25:53,387 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:25:53,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:25:53,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1714417513, now seen corresponding path program 1 times [2023-01-28 06:25:53,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:25:53,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881911452] [2023-01-28 06:25:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:25:53,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:25:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:25:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:25:53,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:25:53,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881911452] [2023-01-28 06:25:53,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881911452] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:25:53,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:25:53,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:25:53,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119167316] [2023-01-28 06:25:53,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:25:53,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:25:53,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:25:53,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:25:53,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:25:53,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 294 [2023-01-28 06:25:53,705 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) [2023-01-28 06:25:53,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:25:53,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 294 [2023-01-28 06:25:53,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:25:53,929 INFO L130 PetriNetUnfolder]: 845/1378 cut-off events. [2023-01-28 06:25:53,929 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2023-01-28 06:25:53,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 1378 events. 845/1378 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5796 event pairs, 243 based on Foata normal form. 0/1124 useless extension candidates. Maximal degree in co-relation 2588. Up to 777 conditions per place. [2023-01-28 06:25:53,941 INFO L137 encePairwiseOnDemand]: 289/294 looper letters, 55 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-01-28 06:25:53,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 253 flow [2023-01-28 06:25:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:25:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:25:53,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-01-28 06:25:53,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340136054421769 [2023-01-28 06:25:53,956 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-01-28 06:25:53,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-01-28 06:25:53,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:25:53,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-01-28 06:25:53,963 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) [2023-01-28 06:25:53,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:53,968 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:53,970 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 471 transitions. [2023-01-28 06:25:53,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 253 flow [2023-01-28 06:25:53,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 60 transitions, 245 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 06:25:53,974 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 100 flow [2023-01-28 06:25:53,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, 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} [2023-01-28 06:25:53,980 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-01-28 06:25:53,980 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 100 flow [2023-01-28 06:25:53,981 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) [2023-01-28 06:25:53,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:25:53,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:25:53,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 06:25:53,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:25:53,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:25:53,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1177704333, now seen corresponding path program 1 times [2023-01-28 06:25:53,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:25:53,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241306878] [2023-01-28 06:25:53,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:25:53,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:25:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:25:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:25:54,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:25:54,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241306878] [2023-01-28 06:25:54,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241306878] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:25:54,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:25:54,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:25:54,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920519536] [2023-01-28 06:25:54,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:25:54,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:25:54,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:25:54,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:25:54,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:25:54,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 294 [2023-01-28 06:25:54,124 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) [2023-01-28 06:25:54,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:25:54,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 294 [2023-01-28 06:25:54,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:25:54,236 INFO L130 PetriNetUnfolder]: 897/1478 cut-off events. [2023-01-28 06:25:54,237 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2023-01-28 06:25:54,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3207 conditions, 1478 events. 897/1478 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6180 event pairs, 398 based on Foata normal form. 0/1224 useless extension candidates. Maximal degree in co-relation 2810. Up to 1184 conditions per place. [2023-01-28 06:25:54,241 INFO L137 encePairwiseOnDemand]: 291/294 looper letters, 48 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2023-01-28 06:25:54,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 249 flow [2023-01-28 06:25:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:25:54,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:25:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-01-28 06:25:54,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2023-01-28 06:25:54,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-01-28 06:25:54,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-01-28 06:25:54,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:25:54,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-01-28 06:25:54,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:54,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:54,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:54,249 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 100 flow. Second operand 3 states and 480 transitions. [2023-01-28 06:25:54,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 249 flow [2023-01-28 06:25:54,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 54 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 06:25:54,252 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 104 flow [2023-01-28 06:25:54,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, 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} [2023-01-28 06:25:54,253 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-01-28 06:25:54,253 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 104 flow [2023-01-28 06:25:54,253 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) [2023-01-28 06:25:54,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:25:54,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:25:54,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 06:25:54,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:25:54,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:25:54,255 INFO L85 PathProgramCache]: Analyzing trace with hash -613507711, now seen corresponding path program 1 times [2023-01-28 06:25:54,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:25:54,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346256697] [2023-01-28 06:25:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:25:54,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:25:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:25:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:25:54,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:25:54,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346256697] [2023-01-28 06:25:54,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346256697] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:25:54,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:25:54,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:25:54,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835119667] [2023-01-28 06:25:54,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:25:54,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:25:54,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:25:54,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:25:54,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:25:54,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 294 [2023-01-28 06:25:54,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:54,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:25:54,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 294 [2023-01-28 06:25:54,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:25:54,469 INFO L130 PetriNetUnfolder]: 861/1442 cut-off events. [2023-01-28 06:25:54,469 INFO L131 PetriNetUnfolder]: For 135/135 co-relation queries the response was YES. [2023-01-28 06:25:54,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3180 conditions, 1442 events. 861/1442 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6182 event pairs, 584 based on Foata normal form. 50/1334 useless extension candidates. Maximal degree in co-relation 2808. Up to 1258 conditions per place. [2023-01-28 06:25:54,475 INFO L137 encePairwiseOnDemand]: 291/294 looper letters, 50 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-01-28 06:25:54,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 264 flow [2023-01-28 06:25:54,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:25:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:25:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-01-28 06:25:54,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351473922902494 [2023-01-28 06:25:54,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-01-28 06:25:54,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-01-28 06:25:54,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:25:54,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-01-28 06:25:54,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:54,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:54,481 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:54,481 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 104 flow. Second operand 3 states and 472 transitions. [2023-01-28 06:25:54,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 264 flow [2023-01-28 06:25:54,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 06:25:54,482 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 122 flow [2023-01-28 06:25:54,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, 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} [2023-01-28 06:25:54,483 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2023-01-28 06:25:54,483 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 122 flow [2023-01-28 06:25:54,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:54,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:25:54,484 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:25:54,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 06:25:54,484 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:25:54,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:25:54,485 INFO L85 PathProgramCache]: Analyzing trace with hash 558175028, now seen corresponding path program 1 times [2023-01-28 06:25:54,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:25:54,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309712371] [2023-01-28 06:25:54,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:25:54,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:25:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:25:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:25:54,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:25:54,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309712371] [2023-01-28 06:25:54,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309712371] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:25:54,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772515762] [2023-01-28 06:25:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:25:54,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:25:54,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:25:54,577 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:25:54,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 06:25:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:25:54,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 06:25:54,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:25:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:25:54,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:25:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:25:54,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772515762] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:25:54,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:25:54,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-01-28 06:25:54,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534304902] [2023-01-28 06:25:54,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:25:54,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 06:25:54,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:25:54,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 06:25:54,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-01-28 06:25:54,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 294 [2023-01-28 06:25:54,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 122 flow. Second operand has 8 states, 8 states have (on average 138.375) internal successors, (1107), 8 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:54,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:25:54,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 294 [2023-01-28 06:25:54,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:25:55,222 INFO L130 PetriNetUnfolder]: 1815/3000 cut-off events. [2023-01-28 06:25:55,225 INFO L131 PetriNetUnfolder]: For 1081/1081 co-relation queries the response was YES. [2023-01-28 06:25:55,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7073 conditions, 3000 events. 1815/3000 cut-off events. For 1081/1081 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14159 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. [2023-01-28 06:25:55,235 INFO L137 encePairwiseOnDemand]: 288/294 looper letters, 164 selfloop transitions, 22 changer transitions 0/187 dead transitions. [2023-01-28 06:25:55,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 187 transitions, 900 flow [2023-01-28 06:25:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 06:25:55,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 06:25:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1535 transitions. [2023-01-28 06:25:55,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221088435374149 [2023-01-28 06:25:55,239 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1535 transitions. [2023-01-28 06:25:55,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1535 transitions. [2023-01-28 06:25:55,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:25:55,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1535 transitions. [2023-01-28 06:25:55,243 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) [2023-01-28 06:25:55,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:55,247 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:55,247 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 122 flow. Second operand 10 states and 1535 transitions. [2023-01-28 06:25:55,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 187 transitions, 900 flow [2023-01-28 06:25:55,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 187 transitions, 887 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 06:25:55,255 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 280 flow [2023-01-28 06:25:55,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, 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} [2023-01-28 06:25:55,256 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-01-28 06:25:55,257 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 280 flow [2023-01-28 06:25:55,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.375) internal successors, (1107), 8 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:55,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:25:55,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:25:55,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 06:25:55,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:25:55,462 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:25:55,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:25:55,463 INFO L85 PathProgramCache]: Analyzing trace with hash -957332165, now seen corresponding path program 1 times [2023-01-28 06:25:55,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:25:55,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731928396] [2023-01-28 06:25:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:25:55,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:25:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:25:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:25:55,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:25:55,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731928396] [2023-01-28 06:25:55,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731928396] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:25:55,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:25:55,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 06:25:55,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158160034] [2023-01-28 06:25:55,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:25:55,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:25:55,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:25:55,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:25:55,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:25:55,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 294 [2023-01-28 06:25:55,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:55,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:25:55,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 294 [2023-01-28 06:25:55,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:25:55,662 INFO L130 PetriNetUnfolder]: 573/1102 cut-off events. [2023-01-28 06:25:55,662 INFO L131 PetriNetUnfolder]: For 410/410 co-relation queries the response was YES. [2023-01-28 06:25:55,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2672 conditions, 1102 events. 573/1102 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4907 event pairs, 98 based on Foata normal form. 0/1022 useless extension candidates. Maximal degree in co-relation 1698. Up to 785 conditions per place. [2023-01-28 06:25:55,666 INFO L137 encePairwiseOnDemand]: 289/294 looper letters, 46 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-01-28 06:25:55,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 329 flow [2023-01-28 06:25:55,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:25:55,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:25:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-01-28 06:25:55,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2023-01-28 06:25:55,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-01-28 06:25:55,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-01-28 06:25:55,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:25:55,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-01-28 06:25:55,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:55,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:55,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:55,670 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 280 flow. Second operand 3 states and 450 transitions. [2023-01-28 06:25:55,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 329 flow [2023-01-28 06:25:55,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 317 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-01-28 06:25:55,672 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2023-01-28 06:25:55,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, 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} [2023-01-28 06:25:55,675 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-01-28 06:25:55,675 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2023-01-28 06:25:55,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:55,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:25:55,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:25:55,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 06:25:55,675 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:25:55,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:25:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1417362489, now seen corresponding path program 1 times [2023-01-28 06:25:55,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:25:55,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307728412] [2023-01-28 06:25:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:25:55,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:25:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:25:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:25:55,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:25:55,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307728412] [2023-01-28 06:25:55,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307728412] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:25:55,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:25:55,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:25:55,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675697222] [2023-01-28 06:25:55,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:25:55,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:25:55,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:25:55,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:25:55,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:25:55,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 294 [2023-01-28 06:25:55,742 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) [2023-01-28 06:25:55,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:25:55,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 294 [2023-01-28 06:25:55,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:25:55,910 INFO L130 PetriNetUnfolder]: 679/1270 cut-off events. [2023-01-28 06:25:55,910 INFO L131 PetriNetUnfolder]: For 397/397 co-relation queries the response was YES. [2023-01-28 06:25:55,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3196 conditions, 1270 events. 679/1270 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5464 event pairs, 209 based on Foata normal form. 18/1288 useless extension candidates. Maximal degree in co-relation 2552. Up to 666 conditions per place. [2023-01-28 06:25:55,917 INFO L137 encePairwiseOnDemand]: 288/294 looper letters, 78 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2023-01-28 06:25:55,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 93 transitions, 524 flow [2023-01-28 06:25:55,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 06:25:55,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 06:25:55,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 896 transitions. [2023-01-28 06:25:55,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2023-01-28 06:25:55,920 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 896 transitions. [2023-01-28 06:25:55,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 896 transitions. [2023-01-28 06:25:55,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:25:55,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 896 transitions. [2023-01-28 06:25:55,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.33333333333334) internal successors, (896), 6 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:55,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 294.0) internal successors, (2058), 7 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:55,926 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 294.0) internal successors, (2058), 7 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:55,926 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 6 states and 896 transitions. [2023-01-28 06:25:55,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 93 transitions, 524 flow [2023-01-28 06:25:55,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 93 transitions, 511 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 06:25:55,929 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 271 flow [2023-01-28 06:25:55,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-01-28 06:25:55,930 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 21 predicate places. [2023-01-28 06:25:55,930 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 271 flow [2023-01-28 06:25:55,931 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) [2023-01-28 06:25:55,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:25:55,931 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] [2023-01-28 06:25:55,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 06:25:55,931 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:25:55,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:25:55,932 INFO L85 PathProgramCache]: Analyzing trace with hash 256939556, now seen corresponding path program 1 times [2023-01-28 06:25:55,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:25:55,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175437698] [2023-01-28 06:25:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:25:55,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:25:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:25:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:25:56,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:25:56,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175437698] [2023-01-28 06:25:56,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175437698] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:25:56,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:25:56,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-28 06:25:56,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254177020] [2023-01-28 06:25:56,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:25:56,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 06:25:56,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:25:56,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 06:25:56,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-01-28 06:25:56,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 294 [2023-01-28 06:25:56,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 271 flow. Second operand has 10 states, 10 states have (on average 110.1) internal successors, (1101), 10 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:56,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:25:56,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 294 [2023-01-28 06:25:56,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:25:56,912 INFO L130 PetriNetUnfolder]: 975/1854 cut-off events. [2023-01-28 06:25:56,912 INFO L131 PetriNetUnfolder]: For 1249/1249 co-relation queries the response was YES. [2023-01-28 06:25:56,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4720 conditions, 1854 events. 975/1854 cut-off events. For 1249/1249 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9331 event pairs, 295 based on Foata normal form. 0/1832 useless extension candidates. Maximal degree in co-relation 3621. Up to 1030 conditions per place. [2023-01-28 06:25:56,919 INFO L137 encePairwiseOnDemand]: 285/294 looper letters, 106 selfloop transitions, 10 changer transitions 3/124 dead transitions. [2023-01-28 06:25:56,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 124 transitions, 771 flow [2023-01-28 06:25:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 06:25:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 06:25:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 967 transitions. [2023-01-28 06:25:56,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111394557823129 [2023-01-28 06:25:56,922 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 967 transitions. [2023-01-28 06:25:56,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 967 transitions. [2023-01-28 06:25:56,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:25:56,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 967 transitions. [2023-01-28 06:25:56,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.875) internal successors, (967), 8 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:56,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:56,928 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:56,928 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 271 flow. Second operand 8 states and 967 transitions. [2023-01-28 06:25:56,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 124 transitions, 771 flow [2023-01-28 06:25:56,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 124 transitions, 748 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-01-28 06:25:56,932 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 327 flow [2023-01-28 06:25:56,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-01-28 06:25:56,932 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 31 predicate places. [2023-01-28 06:25:56,932 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 327 flow [2023-01-28 06:25:56,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.1) internal successors, (1101), 10 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:56,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:25:56,933 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] [2023-01-28 06:25:56,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 06:25:56,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:25:56,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:25:56,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1974860314, now seen corresponding path program 2 times [2023-01-28 06:25:56,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:25:56,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086551355] [2023-01-28 06:25:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:25:56,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:25:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:25:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:25:57,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:25:57,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086551355] [2023-01-28 06:25:57,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086551355] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:25:57,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:25:57,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-28 06:25:57,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48213266] [2023-01-28 06:25:57,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:25:57,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 06:25:57,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:25:57,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 06:25:57,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-01-28 06:25:57,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 294 [2023-01-28 06:25:57,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 110.1) internal successors, (1101), 10 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:57,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:25:57,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 294 [2023-01-28 06:25:57,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:25:57,893 INFO L130 PetriNetUnfolder]: 1273/2412 cut-off events. [2023-01-28 06:25:57,893 INFO L131 PetriNetUnfolder]: For 1456/1456 co-relation queries the response was YES. [2023-01-28 06:25:57,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6462 conditions, 2412 events. 1273/2412 cut-off events. For 1456/1456 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 12235 event pairs, 356 based on Foata normal form. 0/2383 useless extension candidates. Maximal degree in co-relation 4242. Up to 965 conditions per place. [2023-01-28 06:25:57,902 INFO L137 encePairwiseOnDemand]: 286/294 looper letters, 106 selfloop transitions, 14 changer transitions 3/128 dead transitions. [2023-01-28 06:25:57,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 128 transitions, 843 flow [2023-01-28 06:25:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 06:25:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 06:25:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 967 transitions. [2023-01-28 06:25:57,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111394557823129 [2023-01-28 06:25:57,904 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 967 transitions. [2023-01-28 06:25:57,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 967 transitions. [2023-01-28 06:25:57,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:25:57,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 967 transitions. [2023-01-28 06:25:57,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.875) internal successors, (967), 8 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:57,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:57,909 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:57,909 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 327 flow. Second operand 8 states and 967 transitions. [2023-01-28 06:25:57,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 128 transitions, 843 flow [2023-01-28 06:25:57,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 128 transitions, 843 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 06:25:57,914 INFO L231 Difference]: Finished difference. Result has 76 places, 62 transitions, 405 flow [2023-01-28 06:25:57,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=405, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2023-01-28 06:25:57,914 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 41 predicate places. [2023-01-28 06:25:57,914 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 405 flow [2023-01-28 06:25:57,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.1) internal successors, (1101), 10 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:57,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:25:57,915 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] [2023-01-28 06:25:57,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 06:25:57,915 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:25:57,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:25:57,915 INFO L85 PathProgramCache]: Analyzing trace with hash 834917319, now seen corresponding path program 1 times [2023-01-28 06:25:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:25:57,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925414331] [2023-01-28 06:25:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:25:57,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:25:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:25:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:25:57,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:25:57,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925414331] [2023-01-28 06:25:57,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925414331] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:25:57,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:25:57,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 06:25:57,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583810917] [2023-01-28 06:25:57,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:25:57,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 06:25:57,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:25:57,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 06:25:57,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-28 06:25:57,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 294 [2023-01-28 06:25:57,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 62 transitions, 405 flow. Second operand has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:57,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:25:57,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 294 [2023-01-28 06:25:57,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:25:58,220 INFO L130 PetriNetUnfolder]: 1345/2519 cut-off events. [2023-01-28 06:25:58,221 INFO L131 PetriNetUnfolder]: For 1788/1788 co-relation queries the response was YES. [2023-01-28 06:25:58,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7088 conditions, 2519 events. 1345/2519 cut-off events. For 1788/1788 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 12306 event pairs, 540 based on Foata normal form. 16/2505 useless extension candidates. Maximal degree in co-relation 5066. Up to 992 conditions per place. [2023-01-28 06:25:58,232 INFO L137 encePairwiseOnDemand]: 287/294 looper letters, 108 selfloop transitions, 15 changer transitions 0/124 dead transitions. [2023-01-28 06:25:58,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 897 flow [2023-01-28 06:25:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 06:25:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 06:25:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1026 transitions. [2023-01-28 06:25:58,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49854227405247814 [2023-01-28 06:25:58,235 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1026 transitions. [2023-01-28 06:25:58,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1026 transitions. [2023-01-28 06:25:58,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:25:58,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1026 transitions. [2023-01-28 06:25:58,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 146.57142857142858) internal successors, (1026), 7 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:58,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:58,240 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:58,240 INFO L175 Difference]: Start difference. First operand has 76 places, 62 transitions, 405 flow. Second operand 7 states and 1026 transitions. [2023-01-28 06:25:58,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 897 flow [2023-01-28 06:25:58,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 873 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-01-28 06:25:58,247 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 515 flow [2023-01-28 06:25:58,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=515, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2023-01-28 06:25:58,247 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 46 predicate places. [2023-01-28 06:25:58,248 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 515 flow [2023-01-28 06:25:58,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:25:58,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:25:58,248 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] [2023-01-28 06:25:58,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 06:25:58,248 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-28 06:25:58,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:25:58,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1564096500, now seen corresponding path program 1 times [2023-01-28 06:25:58,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:25:58,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039746849] [2023-01-28 06:25:58,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:25:58,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:25:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:25:58,269 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:25:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:25:58,298 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:25:58,298 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:25:58,299 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-01-28 06:25:58,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-01-28 06:25:58,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-01-28 06:25:58,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-28 06:25:58,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-28 06:25:58,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-28 06:25:58,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 06:25:58,301 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:25:58,304 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 06:25:58,304 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 06:25:58,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 06:25:58 BasicIcfg [2023-01-28 06:25:58,332 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 06:25:58,333 INFO L158 Benchmark]: Toolchain (without parser) took 8977.95ms. Allocated memory was 373.3MB in the beginning and 817.9MB in the end (delta: 444.6MB). Free memory was 325.3MB in the beginning and 558.0MB in the end (delta: -232.7MB). Peak memory consumption was 213.1MB. Max. memory is 16.0GB. [2023-01-28 06:25:58,333 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 373.3MB. Free memory was 320.6MB in the beginning and 320.5MB in the end (delta: 143.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 06:25:58,333 INFO L158 Benchmark]: CACSL2BoogieTranslator took 392.75ms. Allocated memory is still 373.3MB. Free memory was 324.7MB in the beginning and 296.0MB in the end (delta: 28.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-01-28 06:25:58,333 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.08ms. Allocated memory is still 373.3MB. Free memory was 296.0MB in the beginning and 293.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 06:25:58,333 INFO L158 Benchmark]: Boogie Preprocessor took 22.41ms. Allocated memory is still 373.3MB. Free memory was 293.4MB in the beginning and 291.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 06:25:58,333 INFO L158 Benchmark]: RCFGBuilder took 383.37ms. Allocated memory is still 373.3MB. Free memory was 291.3MB in the beginning and 273.5MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-01-28 06:25:58,334 INFO L158 Benchmark]: TraceAbstraction took 8142.42ms. Allocated memory was 373.3MB in the beginning and 817.9MB in the end (delta: 444.6MB). Free memory was 272.4MB in the beginning and 558.0MB in the end (delta: -285.6MB). Peak memory consumption was 160.6MB. Max. memory is 16.0GB. [2023-01-28 06:25:58,334 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 373.3MB. Free memory was 320.6MB in the beginning and 320.5MB in the end (delta: 143.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 392.75ms. Allocated memory is still 373.3MB. Free memory was 324.7MB in the beginning and 296.0MB in the end (delta: 28.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 33.08ms. Allocated memory is still 373.3MB. Free memory was 296.0MB in the beginning and 293.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 22.41ms. Allocated memory is still 373.3MB. Free memory was 293.4MB in the beginning and 291.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 383.37ms. Allocated memory is still 373.3MB. Free memory was 291.3MB in the beginning and 273.5MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 8142.42ms. Allocated memory was 373.3MB in the beginning and 817.9MB in the end (delta: 444.6MB). Free memory was 272.4MB in the beginning and 558.0MB in the end (delta: -285.6MB). Peak memory consumption was 160.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 144 PlacesBefore, 35 PlacesAfterwards, 147 TransitionsBefore, 33 TransitionsAfterwards, 7334 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 86 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 19 ConcurrentYvCompositions, 5 ChoiceCompositions, 136 TotalNumberOfCompositions, 9508 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7052, independent: 6870, independent conditional: 0, independent unconditional: 6870, dependent: 182, dependent conditional: 0, dependent unconditional: 182, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4045, independent: 3996, independent conditional: 0, independent unconditional: 3996, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7052, independent: 2874, independent conditional: 0, independent unconditional: 2874, dependent: 133, dependent conditional: 0, dependent unconditional: 133, unknown: 4045, unknown conditional: 0, unknown unconditional: 4045] , Statistics on independence cache: Total cache size (in pairs): 167, Positive cache size: 151, Positive conditional cache size: 0, Positive unconditional cache size: 151, 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: 941]: 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[(800)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1020] 0 pthread_t id1, id2; [L1022] 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] [L989] 1 int i; [L990] 1 unsigned int tmp; [L991] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1023] 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] [L991] COND TRUE 1 i<(800) [L994] 1 tmp = __VERIFIER_nondet_uint() [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L1005] 2 int i; [L1006] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L23] COND FALSE 1 !(!cond) [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L961] COND FALSE 1 !(top==(800)) [L968] CALL, EXPR 1 get_top() [L953] 1 return top; [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x [L969] CALL 1 inc_top() [L945] 1 top++ [L969] RET 1 inc_top() [L971] 1 return 0; [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) [L998] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=799, top=1] [L991] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=799, top=1] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) [L982] CALL 2 dec_top() [L949] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET 2 dec_top() [L983] CALL, EXPR 2 get_top() [L953] 2 return top; [L983] RET, EXPR 2 get_top() [L983] EXPR 2 stack[get_top()] [L983] 2 return stack[get_top()]; [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1006] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1006] COND TRUE 2 i<(800) [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 [L978] 2 return (-2); [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) [L1012] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - 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: 1023]: 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: 941]: 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: 8.0s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 472 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 472 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1668 IncrementalHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 0 mSDtfsCounter, 1668 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=515occurred in iteration=9, InterpolantAutomatonStates: 51, 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, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 160 ConstructedInterpolants, 0 QuantifiedInterpolants, 1568 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! [2023-01-28 06:25:58,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...