/usr/bin/java -Xmx8000000000 -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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/17_szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-3902331-m [2022-09-20 22:20:54,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 22:20:54,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 22:20:54,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 22:20:54,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 22:20:54,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 22:20:54,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 22:20:54,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 22:20:54,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 22:20:54,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 22:20:54,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 22:20:55,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 22:20:55,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 22:20:55,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 22:20:55,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 22:20:55,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 22:20:55,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 22:20:55,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 22:20:55,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 22:20:55,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 22:20:55,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 22:20:55,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 22:20:55,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 22:20:55,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 22:20:55,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 22:20:55,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 22:20:55,026 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 22:20:55,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 22:20:55,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 22:20:55,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 22:20:55,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 22:20:55,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 22:20:55,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 22:20:55,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 22:20:55,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 22:20:55,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 22:20:55,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 22:20:55,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 22:20:55,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 22:20:55,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 22:20:55,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 22:20:55,036 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-NoLbe.epf [2022-09-20 22:20:55,068 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 22:20:55,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 22:20:55,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 22:20:55,070 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 22:20:55,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 22:20:55,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 22:20:55,071 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 22:20:55,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 22:20:55,071 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 22:20:55,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 22:20:55,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 22:20:55,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 22:20:55,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 22:20:55,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 22:20:55,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 22:20:55,073 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 22:20:55,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 22:20:55,073 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 22:20:55,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 22:20:55,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 22:20:55,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 22:20:55,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 22:20:55,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 22:20:55,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 22:20:55,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 22:20:55,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 22:20:55,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 22:20:55,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 22:20:55,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 22:20:55,075 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 22:20:55,075 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 22:20:55,075 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 22:20:55,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 22:20:55,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 22:20:55,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 22:20:55,358 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 22:20:55,359 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 22:20:55,360 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/17_szymanski.i [2022-09-20 22:20:55,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e69826a0f/aeb20676d891482986e43e33e71275c7/FLAGc751fc5d0 [2022-09-20 22:20:55,917 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 22:20:55,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i [2022-09-20 22:20:55,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e69826a0f/aeb20676d891482986e43e33e71275c7/FLAGc751fc5d0 [2022-09-20 22:20:56,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e69826a0f/aeb20676d891482986e43e33e71275c7 [2022-09-20 22:20:56,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 22:20:56,394 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 22:20:56,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 22:20:56,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 22:20:56,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 22:20:56,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 10:20:56" (1/1) ... [2022-09-20 22:20:56,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6258f250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:56, skipping insertion in model container [2022-09-20 22:20:56,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 10:20:56" (1/1) ... [2022-09-20 22:20:56,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 22:20:56,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 22:20:56,703 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i[30132,30145] [2022-09-20 22:20:56,712 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i[30481,30494] [2022-09-20 22:20:56,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 22:20:56,728 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 22:20:56,776 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i[30132,30145] [2022-09-20 22:20:56,778 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i[30481,30494] [2022-09-20 22:20:56,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 22:20:56,810 INFO L208 MainTranslator]: Completed translation [2022-09-20 22:20:56,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:56 WrapperNode [2022-09-20 22:20:56,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 22:20:56,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 22:20:56,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 22:20:56,812 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 22:20:56,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:56" (1/1) ... [2022-09-20 22:20:56,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:56" (1/1) ... [2022-09-20 22:20:56,865 INFO L138 Inliner]: procedures = 167, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2022-09-20 22:20:56,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 22:20:56,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 22:20:56,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 22:20:56,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 22:20:56,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:56" (1/1) ... [2022-09-20 22:20:56,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:56" (1/1) ... [2022-09-20 22:20:56,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:56" (1/1) ... [2022-09-20 22:20:56,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:56" (1/1) ... [2022-09-20 22:20:56,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:56" (1/1) ... [2022-09-20 22:20:56,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:56" (1/1) ... [2022-09-20 22:20:56,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:56" (1/1) ... [2022-09-20 22:20:56,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 22:20:56,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 22:20:56,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 22:20:56,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 22:20:56,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:56" (1/1) ... [2022-09-20 22:20:56,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 22:20:56,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:20:56,941 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) [2022-09-20 22:20:56,956 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 [2022-09-20 22:20:56,979 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-09-20 22:20:56,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-09-20 22:20:56,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 22:20:56,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 22:20:56,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 22:20:56,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 22:20:56,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 22:20:56,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 22:20:56,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 22:20:56,982 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 22:20:57,132 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 22:20:57,133 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 22:20:57,343 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 22:20:57,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 22:20:57,354 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-09-20 22:20:57,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 10:20:57 BoogieIcfgContainer [2022-09-20 22:20:57,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 22:20:57,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 22:20:57,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 22:20:57,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 22:20:57,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 10:20:56" (1/3) ... [2022-09-20 22:20:57,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2b2f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 10:20:57, skipping insertion in model container [2022-09-20 22:20:57,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:56" (2/3) ... [2022-09-20 22:20:57,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2b2f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 10:20:57, skipping insertion in model container [2022-09-20 22:20:57,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 10:20:57" (3/3) ... [2022-09-20 22:20:57,365 INFO L112 eAbstractionObserver]: Analyzing ICFG 17_szymanski.i [2022-09-20 22:20:57,380 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 22:20:57,381 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-09-20 22:20:57,381 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 22:20:57,436 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-09-20 22:20:57,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 97 transitions, 199 flow [2022-09-20 22:20:57,527 INFO L130 PetriNetUnfolder]: 24/96 cut-off events. [2022-09-20 22:20:57,528 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 22:20:57,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 96 events. 24/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 76. Up to 3 conditions per place. [2022-09-20 22:20:57,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 97 transitions, 199 flow [2022-09-20 22:20:57,537 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 96 transitions, 195 flow [2022-09-20 22:20:57,551 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 22:20:57,558 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;@69fb59be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 22:20:57,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-09-20 22:20:57,581 INFO L130 PetriNetUnfolder]: 14/66 cut-off events. [2022-09-20 22:20:57,581 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 22:20:57,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:20:57,582 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:20:57,582 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:20:57,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:20:57,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1122267577, now seen corresponding path program 1 times [2022-09-20 22:20:57,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:20:57,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065380425] [2022-09-20 22:20:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:20:57,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:20:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:20:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:20:57,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:20:57,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065380425] [2022-09-20 22:20:57,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065380425] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:20:57,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:20:57,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 22:20:57,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957878887] [2022-09-20 22:20:57,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:20:57,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 22:20:57,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:20:57,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 22:20:57,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 22:20:57,845 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 97 [2022-09-20 22:20:57,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 96 transitions, 195 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:57,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:20:57,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 97 [2022-09-20 22:20:57,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:20:57,877 INFO L130 PetriNetUnfolder]: 12/68 cut-off events. [2022-09-20 22:20:57,878 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-09-20 22:20:57,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 68 events. 12/68 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 12/68 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-09-20 22:20:57,880 INFO L137 encePairwiseOnDemand]: 83/97 looper letters, 1 selfloop transitions, 0 changer transitions 0/68 dead transitions. [2022-09-20 22:20:57,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 141 flow [2022-09-20 22:20:57,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 22:20:57,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 22:20:57,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 175 transitions. [2022-09-20 22:20:57,890 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9020618556701031 [2022-09-20 22:20:57,891 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 175 transitions. [2022-09-20 22:20:57,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 175 transitions. [2022-09-20 22:20:57,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:20:57,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 175 transitions. [2022-09-20 22:20:57,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:57,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:57,900 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:57,902 INFO L175 Difference]: Start difference. First operand has 76 places, 96 transitions, 195 flow. Second operand 2 states and 175 transitions. [2022-09-20 22:20:57,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 141 flow [2022-09-20 22:20:57,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 68 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 22:20:57,907 INFO L231 Difference]: Finished difference. Result has 60 places, 68 transitions, 138 flow [2022-09-20 22:20:57,909 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=60, PETRI_TRANSITIONS=68} [2022-09-20 22:20:57,912 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, -16 predicate places. [2022-09-20 22:20:57,912 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 68 transitions, 138 flow [2022-09-20 22:20:57,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:57,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:20:57,913 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:20:57,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 22:20:57,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:20:57,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:20:57,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1429889384, now seen corresponding path program 1 times [2022-09-20 22:20:57,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:20:57,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553908009] [2022-09-20 22:20:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:20:57,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:20:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:20:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:20:57,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:20:57,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553908009] [2022-09-20 22:20:57,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553908009] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:20:57,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:20:57,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 22:20:57,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956081905] [2022-09-20 22:20:57,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:20:57,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 22:20:57,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:20:57,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 22:20:57,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 22:20:57,985 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-09-20 22:20:57,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 68 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:57,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:20:57,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-09-20 22:20:57,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:20:58,029 INFO L130 PetriNetUnfolder]: 56/195 cut-off events. [2022-09-20 22:20:58,029 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 22:20:58,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 195 events. 56/195 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 502 event pairs, 2 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 235. Up to 24 conditions per place. [2022-09-20 22:20:58,032 INFO L137 encePairwiseOnDemand]: 92/97 looper letters, 9 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2022-09-20 22:20:58,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 170 flow [2022-09-20 22:20:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 22:20:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 22:20:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2022-09-20 22:20:58,042 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8006872852233677 [2022-09-20 22:20:58,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2022-09-20 22:20:58,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2022-09-20 22:20:58,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:20:58,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2022-09-20 22:20:58,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,047 INFO L175 Difference]: Start difference. First operand has 60 places, 68 transitions, 138 flow. Second operand 3 states and 233 transitions. [2022-09-20 22:20:58,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 170 flow [2022-09-20 22:20:58,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 72 transitions, 170 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 22:20:58,049 INFO L231 Difference]: Finished difference. Result has 64 places, 70 transitions, 162 flow [2022-09-20 22:20:58,050 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=64, PETRI_TRANSITIONS=70} [2022-09-20 22:20:58,051 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, -12 predicate places. [2022-09-20 22:20:58,051 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 70 transitions, 162 flow [2022-09-20 22:20:58,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:20:58,052 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:20:58,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 22:20:58,052 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:20:58,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:20:58,053 INFO L85 PathProgramCache]: Analyzing trace with hash -257500694, now seen corresponding path program 1 times [2022-09-20 22:20:58,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:20:58,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912474608] [2022-09-20 22:20:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:20:58,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:20:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:20:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:20:58,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:20:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912474608] [2022-09-20 22:20:58,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912474608] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:20:58,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:20:58,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 22:20:58,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157313009] [2022-09-20 22:20:58,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:20:58,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 22:20:58,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:20:58,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 22:20:58,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 22:20:58,100 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-09-20 22:20:58,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 70 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:20:58,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-09-20 22:20:58,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:20:58,135 INFO L130 PetriNetUnfolder]: 46/168 cut-off events. [2022-09-20 22:20:58,135 INFO L131 PetriNetUnfolder]: For 27/34 co-relation queries the response was YES. [2022-09-20 22:20:58,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 168 events. 46/168 cut-off events. For 27/34 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 376 event pairs, 2 based on Foata normal form. 8/138 useless extension candidates. Maximal degree in co-relation 229. Up to 16 conditions per place. [2022-09-20 22:20:58,138 INFO L137 encePairwiseOnDemand]: 93/97 looper letters, 8 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2022-09-20 22:20:58,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 182 flow [2022-09-20 22:20:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 22:20:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 22:20:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2022-09-20 22:20:58,140 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7938144329896907 [2022-09-20 22:20:58,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2022-09-20 22:20:58,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2022-09-20 22:20:58,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:20:58,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2022-09-20 22:20:58,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,144 INFO L175 Difference]: Start difference. First operand has 64 places, 70 transitions, 162 flow. Second operand 3 states and 231 transitions. [2022-09-20 22:20:58,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 182 flow [2022-09-20 22:20:58,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 70 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-20 22:20:58,146 INFO L231 Difference]: Finished difference. Result has 65 places, 70 transitions, 166 flow [2022-09-20 22:20:58,147 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=65, PETRI_TRANSITIONS=70} [2022-09-20 22:20:58,147 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, -11 predicate places. [2022-09-20 22:20:58,148 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 70 transitions, 166 flow [2022-09-20 22:20:58,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:20:58,148 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:20:58,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-20 22:20:58,149 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:20:58,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:20:58,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2147086769, now seen corresponding path program 1 times [2022-09-20 22:20:58,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:20:58,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281852034] [2022-09-20 22:20:58,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:20:58,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:20:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:20:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:20:58,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:20:58,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281852034] [2022-09-20 22:20:58,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281852034] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:20:58,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:20:58,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 22:20:58,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733169242] [2022-09-20 22:20:58,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:20:58,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 22:20:58,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:20:58,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 22:20:58,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 22:20:58,237 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-09-20 22:20:58,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 70 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:20:58,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-09-20 22:20:58,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:20:58,406 INFO L130 PetriNetUnfolder]: 267/560 cut-off events. [2022-09-20 22:20:58,406 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-09-20 22:20:58,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 560 events. 267/560 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2184 event pairs, 52 based on Foata normal form. 0/403 useless extension candidates. Maximal degree in co-relation 932. Up to 227 conditions per place. [2022-09-20 22:20:58,412 INFO L137 encePairwiseOnDemand]: 87/97 looper letters, 21 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2022-09-20 22:20:58,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 240 flow [2022-09-20 22:20:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 22:20:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 22:20:58,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 223 transitions. [2022-09-20 22:20:58,426 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7663230240549829 [2022-09-20 22:20:58,426 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 223 transitions. [2022-09-20 22:20:58,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 223 transitions. [2022-09-20 22:20:58,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:20:58,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 223 transitions. [2022-09-20 22:20:58,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,429 INFO L175 Difference]: Start difference. First operand has 65 places, 70 transitions, 166 flow. Second operand 3 states and 223 transitions. [2022-09-20 22:20:58,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 240 flow [2022-09-20 22:20:58,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 22:20:58,432 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 216 flow [2022-09-20 22:20:58,432 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2022-09-20 22:20:58,437 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, -8 predicate places. [2022-09-20 22:20:58,437 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 216 flow [2022-09-20 22:20:58,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:20:58,438 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:20:58,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-20 22:20:58,439 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 22:20:58,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:20:58,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2063838827, now seen corresponding path program 2 times [2022-09-20 22:20:58,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:20:58,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647360531] [2022-09-20 22:20:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:20:58,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:20:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:20:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:20:58,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:20:58,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647360531] [2022-09-20 22:20:58,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647360531] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:20:58,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:20:58,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 22:20:58,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142227066] [2022-09-20 22:20:58,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:20:58,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 22:20:58,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:20:58,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 22:20:58,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 22:20:58,511 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-09-20 22:20:58,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:20:58,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-09-20 22:20:58,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:20:58,657 INFO L130 PetriNetUnfolder]: 324/644 cut-off events. [2022-09-20 22:20:58,657 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-09-20 22:20:58,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1248 conditions, 644 events. 324/644 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2513 event pairs, 62 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 1241. Up to 219 conditions per place. [2022-09-20 22:20:58,667 INFO L137 encePairwiseOnDemand]: 86/97 looper letters, 0 selfloop transitions, 0 changer transitions 80/80 dead transitions. [2022-09-20 22:20:58,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 274 flow [2022-09-20 22:20:58,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 22:20:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 22:20:58,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 223 transitions. [2022-09-20 22:20:58,670 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7663230240549829 [2022-09-20 22:20:58,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 223 transitions. [2022-09-20 22:20:58,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 223 transitions. [2022-09-20 22:20:58,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:20:58,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 223 transitions. [2022-09-20 22:20:58,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,673 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 216 flow. Second operand 3 states and 223 transitions. [2022-09-20 22:20:58,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 274 flow [2022-09-20 22:20:58,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 258 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-09-20 22:20:58,680 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2022-09-20 22:20:58,680 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2022-09-20 22:20:58,682 INFO L287 CegarLoopForPetriNet]: 76 programPoint places, -12 predicate places. [2022-09-20 22:20:58,682 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2022-09-20 22:20:58,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 22:20:58,685 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-09-20 22:20:58,685 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-09-20 22:20:58,686 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-09-20 22:20:58,686 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-09-20 22:20:58,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-20 22:20:58,687 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-09-20 22:20:58,691 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-09-20 22:20:58,691 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-09-20 22:20:58,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 10:20:58 BasicIcfg [2022-09-20 22:20:58,700 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-09-20 22:20:58,702 INFO L158 Benchmark]: Toolchain (without parser) took 2305.97ms. Allocated memory was 179.3MB in the beginning and 276.8MB in the end (delta: 97.5MB). Free memory was 149.2MB in the beginning and 109.9MB in the end (delta: 39.3MB). Peak memory consumption was 135.6MB. Max. memory is 8.0GB. [2022-09-20 22:20:58,702 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 179.3MB. Free memory is still 135.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-09-20 22:20:58,703 INFO L158 Benchmark]: CACSL2BoogieTranslator took 415.75ms. Allocated memory was 179.3MB in the beginning and 276.8MB in the end (delta: 97.5MB). Free memory was 148.8MB in the beginning and 235.7MB in the end (delta: -87.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-09-20 22:20:58,704 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.82ms. Allocated memory is still 276.8MB. Free memory was 235.7MB in the beginning and 234.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-20 22:20:58,708 INFO L158 Benchmark]: Boogie Preprocessor took 37.55ms. Allocated memory is still 276.8MB. Free memory was 234.2MB in the beginning and 232.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-20 22:20:58,713 INFO L158 Benchmark]: RCFGBuilder took 452.31ms. Allocated memory is still 276.8MB. Free memory was 232.6MB in the beginning and 219.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-09-20 22:20:58,714 INFO L158 Benchmark]: TraceAbstraction took 1340.34ms. Allocated memory is still 276.8MB. Free memory was 218.9MB in the beginning and 109.9MB in the end (delta: 109.1MB). Peak memory consumption was 109.1MB. Max. memory is 8.0GB. [2022-09-20 22:20:58,719 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 179.3MB. Free memory is still 135.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 415.75ms. Allocated memory was 179.3MB in the beginning and 276.8MB in the end (delta: 97.5MB). Free memory was 148.8MB in the beginning and 235.7MB in the end (delta: -87.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 53.82ms. Allocated memory is still 276.8MB. Free memory was 235.7MB in the beginning and 234.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.55ms. Allocated memory is still 276.8MB. Free memory was 234.2MB in the beginning and 232.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 452.31ms. Allocated memory is still 276.8MB. Free memory was 232.6MB in the beginning and 219.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 1340.34ms. Allocated memory is still 276.8MB. Free memory was 218.9MB in the beginning and 109.9MB in the end (delta: 109.1MB). Peak memory consumption was 109.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 698]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 716]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 95 locations, 4 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: 1.2s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 51 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 66 IncrementalHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 51 mSDtfsCounter, 66 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=216occurred in iteration=4, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 191 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 186 ConstructedInterpolants, 0 QuantifiedInterpolants, 236 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-09-20 22:20:58,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...