/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/spaghetti.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 21:37:17,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 21:37:17,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 21:37:17,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 21:37:17,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 21:37:17,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 21:37:17,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 21:37:17,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 21:37:17,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 21:37:17,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 21:37:17,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 21:37:17,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 21:37:17,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 21:37:17,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 21:37:17,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 21:37:17,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 21:37:17,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 21:37:17,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 21:37:17,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 21:37:17,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 21:37:17,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 21:37:17,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 21:37:17,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 21:37:17,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 21:37:17,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 21:37:17,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 21:37:17,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 21:37:17,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 21:37:17,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 21:37:17,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 21:37:17,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 21:37:17,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 21:37:17,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 21:37:17,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 21:37:17,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 21:37:17,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 21:37:17,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 21:37:17,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 21:37:17,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 21:37:17,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 21:37:17,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 21:37:17,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 21:37:18,029 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 21:37:18,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 21:37:18,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 21:37:18,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 21:37:18,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 21:37:18,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 21:37:18,033 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 21:37:18,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 21:37:18,034 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 21:37:18,034 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 21:37:18,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 21:37:18,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 21:37:18,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 21:37:18,034 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 21:37:18,035 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 21:37:18,037 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 21:37:18,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 21:37:18,037 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 21:37:18,037 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 21:37:18,038 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 21:37:18,038 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 21:37:18,038 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 21:37:18,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 21:37:18,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 21:37:18,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 21:37:18,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:37:18,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 21:37:18,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 21:37:18,040 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 21:37:18,040 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 21:37:18,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 21:37:18,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 21:37:18,040 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 21:37:18,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 21:37:18,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 21:37:18,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 21:37:18,464 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 21:37:18,465 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 21:37:18,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/spaghetti.wvr.c [2021-10-13 21:37:18,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec0417a35/698b25b81dea433d941575c841075104/FLAG573818c65 [2021-10-13 21:37:19,203 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 21:37:19,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/spaghetti.wvr.c [2021-10-13 21:37:19,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec0417a35/698b25b81dea433d941575c841075104/FLAG573818c65 [2021-10-13 21:37:19,578 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec0417a35/698b25b81dea433d941575c841075104 [2021-10-13 21:37:19,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 21:37:19,591 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 21:37:19,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 21:37:19,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 21:37:19,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 21:37:19,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:37:19" (1/1) ... [2021-10-13 21:37:19,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f34138d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:19, skipping insertion in model container [2021-10-13 21:37:19,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:37:19" (1/1) ... [2021-10-13 21:37:19,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 21:37:19,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:37:19,887 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/spaghetti.wvr.c[2397,2410] [2021-10-13 21:37:19,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:37:19,913 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 21:37:19,941 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/spaghetti.wvr.c[2397,2410] [2021-10-13 21:37:19,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:37:19,962 INFO L208 MainTranslator]: Completed translation [2021-10-13 21:37:19,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:19 WrapperNode [2021-10-13 21:37:19,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 21:37:19,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 21:37:19,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 21:37:19,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 21:37:19,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:19" (1/1) ... [2021-10-13 21:37:19,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:19" (1/1) ... [2021-10-13 21:37:20,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 21:37:20,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 21:37:20,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 21:37:20,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 21:37:20,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:19" (1/1) ... [2021-10-13 21:37:20,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:19" (1/1) ... [2021-10-13 21:37:20,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:19" (1/1) ... [2021-10-13 21:37:20,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:19" (1/1) ... [2021-10-13 21:37:20,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:19" (1/1) ... [2021-10-13 21:37:20,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:19" (1/1) ... [2021-10-13 21:37:20,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:19" (1/1) ... [2021-10-13 21:37:20,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 21:37:20,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 21:37:20,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 21:37:20,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 21:37:20,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:19" (1/1) ... [2021-10-13 21:37:20,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:37:20,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 21:37:20,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 21:37:20,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 21:37:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 21:37:20,167 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 21:37:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 21:37:20,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 21:37:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-13 21:37:20,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-13 21:37:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 21:37:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-13 21:37:20,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-13 21:37:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 21:37:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 21:37:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 21:37:20,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 21:37:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 21:37:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 21:37:20,172 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 21:37:20,635 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 21:37:20,636 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 21:37:20,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:37:20 BoogieIcfgContainer [2021-10-13 21:37:20,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 21:37:20,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 21:37:20,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 21:37:20,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 21:37:20,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:37:19" (1/3) ... [2021-10-13 21:37:20,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3837408c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:37:20, skipping insertion in model container [2021-10-13 21:37:20,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:19" (2/3) ... [2021-10-13 21:37:20,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3837408c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:37:20, skipping insertion in model container [2021-10-13 21:37:20,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:37:20" (3/3) ... [2021-10-13 21:37:20,686 INFO L111 eAbstractionObserver]: Analyzing ICFG spaghetti.wvr.c [2021-10-13 21:37:20,696 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 21:37:20,699 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-10-13 21:37:20,699 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 21:37:20,807 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,808 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,808 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,808 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,809 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,809 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,809 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,809 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,810 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,810 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,810 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,811 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,811 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,811 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,811 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,812 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,812 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,813 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,813 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,813 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,813 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,814 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,814 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,814 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,814 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,814 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,815 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,815 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,821 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,822 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,822 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,822 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,822 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,823 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,823 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,823 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,823 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,823 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,824 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,824 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,824 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,824 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,825 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,825 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,826 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,826 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,826 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,826 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,827 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,827 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,827 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,827 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,828 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,828 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,828 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,828 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,832 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,833 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,833 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,833 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,839 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,839 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,839 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,840 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,842 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,843 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,843 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,845 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,846 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,846 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~nondet8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:37:20,859 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-13 21:37:20,914 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 21:37:20,922 INFO L339 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 21:37:20,923 INFO L340 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2021-10-13 21:37:20,943 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 21:37:20,955 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 142 transitions, 316 flow [2021-10-13 21:37:20,959 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 142 transitions, 316 flow [2021-10-13 21:37:20,961 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 146 places, 142 transitions, 316 flow [2021-10-13 21:37:21,030 INFO L129 PetriNetUnfolder]: 9/138 cut-off events. [2021-10-13 21:37:21,030 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-13 21:37:21,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 138 events. 9/138 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 174 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2021-10-13 21:37:21,045 INFO L116 LiptonReduction]: Number of co-enabled transitions 3616 [2021-10-13 21:37:35,940 INFO L131 LiptonReduction]: Checked pairs total: 5561 [2021-10-13 21:37:35,941 INFO L133 LiptonReduction]: Total number of compositions: 142 [2021-10-13 21:37:35,950 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 51 transitions, 134 flow [2021-10-13 21:37:36,008 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 643 states, 625 states have (on average 4.2784) internal successors, (2674), 642 states have internal predecessors, (2674), 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) [2021-10-13 21:37:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 643 states, 625 states have (on average 4.2784) internal successors, (2674), 642 states have internal predecessors, (2674), 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) [2021-10-13 21:37:36,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2021-10-13 21:37:36,020 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:36,020 INFO L512 BasicCegarLoop]: trace histogram [1] [2021-10-13 21:37:36,021 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:37:36,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:36,027 INFO L82 PathProgramCache]: Analyzing trace with hash 538, now seen corresponding path program 1 times [2021-10-13 21:37:36,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:36,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362697787] [2021-10-13 21:37:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:36,043 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:36,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:36,048 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:37:36,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 21:37:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:36,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 21:37:36,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:36,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:36,136 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:36,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362697787] [2021-10-13 21:37:36,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362697787] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:36,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:36,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0, 0] imperfect sequences [] total 0 [2021-10-13 21:37:36,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870960495] [2021-10-13 21:37:36,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 21:37:36,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:36,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 21:37:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 21:37:36,166 INFO L87 Difference]: Start difference. First operand has 643 states, 625 states have (on average 4.2784) internal successors, (2674), 642 states have internal predecessors, (2674), 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) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2021-10-13 21:37:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:36,223 INFO L93 Difference]: Finished difference Result 640 states and 2671 transitions. [2021-10-13 21:37:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 21:37:36,225 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) Word has length 1 [2021-10-13 21:37:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:36,259 INFO L225 Difference]: With dead ends: 640 [2021-10-13 21:37:36,259 INFO L226 Difference]: Without dead ends: 640 [2021-10-13 21:37:36,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 21:37:36,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-10-13 21:37:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 640. [2021-10-13 21:37:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 625 states have (on average 4.2736) internal successors, (2671), 639 states have internal predecessors, (2671), 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) [2021-10-13 21:37:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 2671 transitions. [2021-10-13 21:37:36,420 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 2671 transitions. Word has length 1 [2021-10-13 21:37:36,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:36,421 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 2671 transitions. [2021-10-13 21:37:36,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2021-10-13 21:37:36,421 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 2671 transitions. [2021-10-13 21:37:36,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 21:37:36,422 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:36,422 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 21:37:36,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:36,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:37:36,637 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:37:36,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:36,639 INFO L82 PathProgramCache]: Analyzing trace with hash 530543, now seen corresponding path program 1 times [2021-10-13 21:37:36,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:36,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696478221] [2021-10-13 21:37:36,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:36,641 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:36,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:36,642 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:37:36,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 21:37:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:36,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:37:36,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:37,162 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-13 21:37:37,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 72 [2021-10-13 21:37:37,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 72 [2021-10-13 21:37:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:37,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:37,512 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:37,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696478221] [2021-10-13 21:37:37,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696478221] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:37,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:37,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:37:37,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843014486] [2021-10-13 21:37:37,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:37:37,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:37,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:37:37,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:37,517 INFO L87 Difference]: Start difference. First operand 640 states and 2671 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-13 21:37:37,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:37,638 INFO L93 Difference]: Finished difference Result 610 states and 2557 transitions. [2021-10-13 21:37:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:37:37,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) Word has length 3 [2021-10-13 21:37:37,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:37,648 INFO L225 Difference]: With dead ends: 610 [2021-10-13 21:37:37,648 INFO L226 Difference]: Without dead ends: 610 [2021-10-13 21:37:37,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-10-13 21:37:37,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-10-13 21:37:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 597 states have (on average 4.283082077051926) internal successors, (2557), 609 states have internal predecessors, (2557), 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) [2021-10-13 21:37:37,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 2557 transitions. [2021-10-13 21:37:37,689 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 2557 transitions. Word has length 3 [2021-10-13 21:37:37,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:37,690 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 2557 transitions. [2021-10-13 21:37:37,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-13 21:37:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 2557 transitions. [2021-10-13 21:37:37,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 21:37:37,691 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:37,691 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 21:37:37,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:37,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:37:37,905 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:37:37,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:37,907 INFO L82 PathProgramCache]: Analyzing trace with hash 530544, now seen corresponding path program 1 times [2021-10-13 21:37:37,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:37,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971248597] [2021-10-13 21:37:37,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:37,908 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:37,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:37,910 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:37:37,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 21:37:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:37,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 21:37:37,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:38,037 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:37:38,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 42 [2021-10-13 21:37:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:38,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:38,192 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:38,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971248597] [2021-10-13 21:37:38,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971248597] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:38,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:38,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:37:38,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552677215] [2021-10-13 21:37:38,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:37:38,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:38,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:37:38,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:38,196 INFO L87 Difference]: Start difference. First operand 610 states and 2557 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-13 21:37:38,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:38,264 INFO L93 Difference]: Finished difference Result 580 states and 2443 transitions. [2021-10-13 21:37:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:37:38,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) Word has length 3 [2021-10-13 21:37:38,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:38,273 INFO L225 Difference]: With dead ends: 580 [2021-10-13 21:37:38,273 INFO L226 Difference]: Without dead ends: 580 [2021-10-13 21:37:38,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-10-13 21:37:38,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-10-13 21:37:38,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 569 states have (on average 4.293497363796134) internal successors, (2443), 579 states have internal predecessors, (2443), 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) [2021-10-13 21:37:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 2443 transitions. [2021-10-13 21:37:38,310 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 2443 transitions. Word has length 3 [2021-10-13 21:37:38,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:38,310 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 2443 transitions. [2021-10-13 21:37:38,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-13 21:37:38,311 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 2443 transitions. [2021-10-13 21:37:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 21:37:38,311 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:38,312 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 21:37:38,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:38,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:37:38,525 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:37:38,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:38,527 INFO L82 PathProgramCache]: Analyzing trace with hash 509862603, now seen corresponding path program 1 times [2021-10-13 21:37:38,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:38,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950457659] [2021-10-13 21:37:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:38,528 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:38,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:38,530 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:37:38,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 21:37:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:38,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:37:38,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:38,871 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-13 21:37:38,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 76 [2021-10-13 21:37:38,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 77 [2021-10-13 21:37:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:39,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:39,474 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:39,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950457659] [2021-10-13 21:37:39,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950457659] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:39,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:39,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:37:39,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311191348] [2021-10-13 21:37:39,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:37:39,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:39,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:37:39,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:39,477 INFO L87 Difference]: Start difference. First operand 580 states and 2443 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-10-13 21:37:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:39,591 INFO L93 Difference]: Finished difference Result 562 states and 2389 transitions. [2021-10-13 21:37:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:37:39,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) Word has length 5 [2021-10-13 21:37:39,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:39,600 INFO L225 Difference]: With dead ends: 562 [2021-10-13 21:37:39,600 INFO L226 Difference]: Without dead ends: 562 [2021-10-13 21:37:39,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:39,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-10-13 21:37:39,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-10-13 21:37:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 553 states have (on average 4.320072332730561) internal successors, (2389), 561 states have internal predecessors, (2389), 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) [2021-10-13 21:37:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 2389 transitions. [2021-10-13 21:37:39,632 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 2389 transitions. Word has length 5 [2021-10-13 21:37:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:39,632 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 2389 transitions. [2021-10-13 21:37:39,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-10-13 21:37:39,633 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 2389 transitions. [2021-10-13 21:37:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 21:37:39,633 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:39,633 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 21:37:39,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:39,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:37:39,849 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:37:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:39,849 INFO L82 PathProgramCache]: Analyzing trace with hash 509862604, now seen corresponding path program 1 times [2021-10-13 21:37:39,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:39,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321734512] [2021-10-13 21:37:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:39,853 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:39,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:39,854 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:37:39,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 21:37:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:39,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 21:37:39,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:39,979 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:37:39,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-10-13 21:37:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:40,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:40,353 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:40,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321734512] [2021-10-13 21:37:40,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321734512] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:40,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:40,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:37:40,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931849076] [2021-10-13 21:37:40,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:37:40,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:40,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:37:40,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:40,356 INFO L87 Difference]: Start difference. First operand 562 states and 2389 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-10-13 21:37:40,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:40,414 INFO L93 Difference]: Finished difference Result 544 states and 2335 transitions. [2021-10-13 21:37:40,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:37:40,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) Word has length 5 [2021-10-13 21:37:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:40,422 INFO L225 Difference]: With dead ends: 544 [2021-10-13 21:37:40,422 INFO L226 Difference]: Without dead ends: 544 [2021-10-13 21:37:40,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:40,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-10-13 21:37:40,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-10-13 21:37:40,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 537 states have (on average 4.348230912476723) internal successors, (2335), 543 states have internal predecessors, (2335), 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) [2021-10-13 21:37:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 2335 transitions. [2021-10-13 21:37:40,453 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 2335 transitions. Word has length 5 [2021-10-13 21:37:40,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:40,453 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 2335 transitions. [2021-10-13 21:37:40,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-10-13 21:37:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 2335 transitions. [2021-10-13 21:37:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:37:40,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:40,455 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:37:40,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:40,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:37:40,670 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:37:40,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:40,671 INFO L82 PathProgramCache]: Analyzing trace with hash 351703335, now seen corresponding path program 1 times [2021-10-13 21:37:40,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:40,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712599599] [2021-10-13 21:37:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:40,673 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:40,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:40,675 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:37:40,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 21:37:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:40,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:37:40,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:40,796 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:37:40,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-13 21:37:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:40,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:40,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:40,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712599599] [2021-10-13 21:37:40,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712599599] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:40,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:40,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:37:40,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164245633] [2021-10-13 21:37:40,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:37:40,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:40,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:37:40,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:37:40,866 INFO L87 Difference]: Start difference. First operand 544 states and 2335 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-13 21:37:40,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:40,912 INFO L93 Difference]: Finished difference Result 514 states and 2221 transitions. [2021-10-13 21:37:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:37:40,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) Word has length 7 [2021-10-13 21:37:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:40,920 INFO L225 Difference]: With dead ends: 514 [2021-10-13 21:37:40,920 INFO L226 Difference]: Without dead ends: 514 [2021-10-13 21:37:40,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:37:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-10-13 21:37:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-10-13 21:37:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 509 states have (on average 4.363457760314342) internal successors, (2221), 513 states have internal predecessors, (2221), 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) [2021-10-13 21:37:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 2221 transitions. [2021-10-13 21:37:40,952 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 2221 transitions. Word has length 7 [2021-10-13 21:37:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:40,953 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 2221 transitions. [2021-10-13 21:37:40,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-13 21:37:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 2221 transitions. [2021-10-13 21:37:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:37:40,954 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:40,955 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:37:40,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:41,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:37:41,171 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:37:41,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:41,172 INFO L82 PathProgramCache]: Analyzing trace with hash 351703336, now seen corresponding path program 1 times [2021-10-13 21:37:41,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:41,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325355456] [2021-10-13 21:37:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:41,173 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:41,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:41,176 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:37:41,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 21:37:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:41,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 21:37:41,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:41,492 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-13 21:37:41,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 60 [2021-10-13 21:37:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:41,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:41,734 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:41,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325355456] [2021-10-13 21:37:41,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325355456] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:41,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:41,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:37:41,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658326375] [2021-10-13 21:37:41,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:37:41,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:41,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:37:41,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:41,737 INFO L87 Difference]: Start difference. First operand 514 states and 2221 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-10-13 21:37:41,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:41,781 INFO L93 Difference]: Finished difference Result 484 states and 2107 transitions. [2021-10-13 21:37:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:37:41,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) Word has length 7 [2021-10-13 21:37:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:41,788 INFO L225 Difference]: With dead ends: 484 [2021-10-13 21:37:41,789 INFO L226 Difference]: Without dead ends: 484 [2021-10-13 21:37:41,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:41,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-10-13 21:37:41,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2021-10-13 21:37:41,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 481 states have (on average 4.38045738045738) internal successors, (2107), 483 states have internal predecessors, (2107), 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) [2021-10-13 21:37:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 2107 transitions. [2021-10-13 21:37:41,819 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 2107 transitions. Word has length 7 [2021-10-13 21:37:41,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:41,820 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 2107 transitions. [2021-10-13 21:37:41,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-10-13 21:37:41,820 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 2107 transitions. [2021-10-13 21:37:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 21:37:41,822 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:41,822 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:37:41,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:42,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:37:42,036 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:37:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:42,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1315500644, now seen corresponding path program 1 times [2021-10-13 21:37:42,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:42,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531565943] [2021-10-13 21:37:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:42,039 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:42,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:42,040 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:37:42,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 21:37:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:42,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 21:37:42,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:42,409 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-13 21:37:42,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 86 [2021-10-13 21:37:42,422 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 21:37:42,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 86 [2021-10-13 21:37:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:43,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:43,382 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:43,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531565943] [2021-10-13 21:37:43,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531565943] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:43,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:43,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:37:43,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896575838] [2021-10-13 21:37:43,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:37:43,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:43,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:37:43,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:43,385 INFO L87 Difference]: Start difference. First operand 484 states and 2107 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-10-13 21:37:43,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:43,445 INFO L93 Difference]: Finished difference Result 403 states and 1702 transitions. [2021-10-13 21:37:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:37:43,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) Word has length 9 [2021-10-13 21:37:43,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:43,451 INFO L225 Difference]: With dead ends: 403 [2021-10-13 21:37:43,451 INFO L226 Difference]: Without dead ends: 403 [2021-10-13 21:37:43,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:37:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-10-13 21:37:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2021-10-13 21:37:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 401 states have (on average 4.2443890274314215) internal successors, (1702), 402 states have internal predecessors, (1702), 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) [2021-10-13 21:37:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1702 transitions. [2021-10-13 21:37:43,495 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1702 transitions. Word has length 9 [2021-10-13 21:37:43,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:43,496 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1702 transitions. [2021-10-13 21:37:43,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-10-13 21:37:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1702 transitions. [2021-10-13 21:37:43,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 21:37:43,498 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:43,498 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:37:43,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:43,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:37:43,713 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:37:43,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:43,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1315500643, now seen corresponding path program 1 times [2021-10-13 21:37:43,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:43,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39167385] [2021-10-13 21:37:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:43,716 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:43,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:43,717 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:37:43,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 21:37:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:43,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:37:43,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:43,905 INFO L354 Elim1Store]: treesize reduction 84, result has 22.9 percent of original size [2021-10-13 21:37:43,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 30 [2021-10-13 21:37:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:44,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:44,096 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:44,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39167385] [2021-10-13 21:37:44,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39167385] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:44,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:44,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 21:37:44,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047184760] [2021-10-13 21:37:44,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 21:37:44,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:44,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 21:37:44,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-13 21:37:44,099 INFO L87 Difference]: Start difference. First operand 403 states and 1702 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-10-13 21:37:44,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:44,149 INFO L93 Difference]: Finished difference Result 322 states and 1297 transitions. [2021-10-13 21:37:44,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:37:44,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) Word has length 9 [2021-10-13 21:37:44,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:44,154 INFO L225 Difference]: With dead ends: 322 [2021-10-13 21:37:44,155 INFO L226 Difference]: Without dead ends: 322 [2021-10-13 21:37:44,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-13 21:37:44,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-10-13 21:37:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2021-10-13 21:37:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 4.040498442367602) internal successors, (1297), 321 states have internal predecessors, (1297), 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) [2021-10-13 21:37:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1297 transitions. [2021-10-13 21:37:44,172 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1297 transitions. Word has length 9 [2021-10-13 21:37:44,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:44,172 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1297 transitions. [2021-10-13 21:37:44,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-10-13 21:37:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1297 transitions. [2021-10-13 21:37:44,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 21:37:44,175 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:44,176 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:37:44,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:44,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:37:44,389 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:37:44,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:44,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1433344474, now seen corresponding path program 1 times [2021-10-13 21:37:44,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:44,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791170054] [2021-10-13 21:37:44,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:37:44,391 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:44,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:44,394 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:37:44,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 21:37:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:37:44,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 21:37:44,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:44,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:44,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:44,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791170054] [2021-10-13 21:37:44,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791170054] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:44,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:44,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 21:37:44,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030218606] [2021-10-13 21:37:44,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 21:37:44,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:44,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 21:37:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 21:37:44,660 INFO L87 Difference]: Start difference. First operand 322 states and 1297 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-10-13 21:37:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:44,807 INFO L93 Difference]: Finished difference Result 481 states and 1791 transitions. [2021-10-13 21:37:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:37:44,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 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) Word has length 21 [2021-10-13 21:37:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:44,811 INFO L225 Difference]: With dead ends: 481 [2021-10-13 21:37:44,812 INFO L226 Difference]: Without dead ends: 334 [2021-10-13 21:37:44,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 21:37:44,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-10-13 21:37:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 272. [2021-10-13 21:37:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.8081180811808117) internal successors, (1032), 271 states have internal predecessors, (1032), 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) [2021-10-13 21:37:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 1032 transitions. [2021-10-13 21:37:44,827 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 1032 transitions. Word has length 21 [2021-10-13 21:37:44,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:44,828 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 1032 transitions. [2021-10-13 21:37:44,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-10-13 21:37:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 1032 transitions. [2021-10-13 21:37:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 21:37:44,830 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:37:44,830 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:37:44,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:45,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:37:45,043 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-13 21:37:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:37:45,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1838780448, now seen corresponding path program 2 times [2021-10-13 21:37:45,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:37:45,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859495591] [2021-10-13 21:37:45,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:37:45,046 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:37:45,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:37:45,047 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:37:45,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 21:37:45,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 21:37:45,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:37:45,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 21:37:45,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:37:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:45,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:37:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:37:45,308 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:37:45,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859495591] [2021-10-13 21:37:45,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859495591] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:37:45,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:37:45,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 21:37:45,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844105775] [2021-10-13 21:37:45,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 21:37:45,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:37:45,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 21:37:45,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 21:37:45,310 INFO L87 Difference]: Start difference. First operand 272 states and 1032 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 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) [2021-10-13 21:37:45,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:37:45,458 INFO L93 Difference]: Finished difference Result 353 states and 1292 transitions. [2021-10-13 21:37:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:37:45,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 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) Word has length 21 [2021-10-13 21:37:45,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:37:45,459 INFO L225 Difference]: With dead ends: 353 [2021-10-13 21:37:45,460 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 21:37:45,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 21:37:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 21:37:45,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 21:37:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-13 21:37:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 21:37:45,461 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-10-13 21:37:45,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:37:45,461 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 21:37:45,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 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) [2021-10-13 21:37:45,462 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 21:37:45,462 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 21:37:45,466 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 21:37:45,466 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 21:37:45,467 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 21:37:45,467 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 21:37:45,467 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 21:37:45,467 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 21:37:45,467 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 21:37:45,467 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 21:37:45,468 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 21:37:45,468 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 21:37:45,468 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 21:37:45,468 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 21:37:45,469 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 21:37:45,469 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 21:37:45,469 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 21:37:45,470 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 21:37:45,470 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:37:45,470 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:37:45,471 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 21:37:45,471 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 21:37:45,471 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-13 21:37:45,471 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-13 21:37:45,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 21:37:45,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:37:45,690 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 21:37:45,690 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 21:37:45,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:37:45 BasicIcfg [2021-10-13 21:37:45,693 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 21:37:45,694 INFO L168 Benchmark]: Toolchain (without parser) took 26108.36 ms. Allocated memory was 177.2 MB in the beginning and 260.0 MB in the end (delta: 82.8 MB). Free memory was 152.2 MB in the beginning and 138.5 MB in the end (delta: 13.7 MB). Peak memory consumption was 96.7 MB. Max. memory is 8.0 GB. [2021-10-13 21:37:45,694 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 177.2 MB. Free memory is still 147.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 21:37:45,694 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.46 ms. Allocated memory is still 177.2 MB. Free memory was 151.9 MB in the beginning and 140.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-10-13 21:37:45,695 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.75 ms. Allocated memory is still 177.2 MB. Free memory was 140.9 MB in the beginning and 139.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:37:45,695 INFO L168 Benchmark]: Boogie Preprocessor took 35.94 ms. Allocated memory is still 177.2 MB. Free memory was 139.3 MB in the beginning and 138.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-13 21:37:45,696 INFO L168 Benchmark]: RCFGBuilder took 598.74 ms. Allocated memory is still 177.2 MB. Free memory was 137.8 MB in the beginning and 123.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-10-13 21:37:45,696 INFO L168 Benchmark]: TraceAbstraction took 25016.22 ms. Allocated memory was 177.2 MB in the beginning and 260.0 MB in the end (delta: 82.8 MB). Free memory was 159.6 MB in the beginning and 138.5 MB in the end (delta: 21.2 MB). Peak memory consumption was 103.5 MB. Max. memory is 8.0 GB. [2021-10-13 21:37:45,698 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 177.2 MB. Free memory is still 147.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 368.46 ms. Allocated memory is still 177.2 MB. Free memory was 151.9 MB in the beginning and 140.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.75 ms. Allocated memory is still 177.2 MB. Free memory was 140.9 MB in the beginning and 139.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.94 ms. Allocated memory is still 177.2 MB. Free memory was 139.3 MB in the beginning and 138.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 598.74 ms. Allocated memory is still 177.2 MB. Free memory was 137.8 MB in the beginning and 123.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 25016.22 ms. Allocated memory was 177.2 MB in the beginning and 260.0 MB in the end (delta: 82.8 MB). Free memory was 159.6 MB in the beginning and 138.5 MB in the end (delta: 21.2 MB). Peak memory consumption was 103.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 14982.3ms, 146 PlacesBefore, 60 PlacesAfterwards, 142 TransitionsBefore, 51 TransitionsAfterwards, 3616 CoEnabledTransitionPairs, 6 FixpointIterations, 56 TrivialSequentialCompositions, 66 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 15 ConcurrentYvCompositions, 5 ChoiceCompositions, 142 TotalNumberOfCompositions, 5561 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4569, positive: 4506, positive conditional: 0, positive unconditional: 4506, negative: 63, negative conditional: 0, negative unconditional: 63, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2606, positive: 2580, positive conditional: 0, positive unconditional: 2580, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2606, positive: 2545, positive conditional: 0, positive unconditional: 2545, negative: 61, negative conditional: 0, negative unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 61, positive: 35, positive conditional: 0, positive unconditional: 35, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 160, positive: 88, positive conditional: 0, positive unconditional: 88, negative: 71, negative conditional: 0, negative unconditional: 71, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4569, positive: 1926, positive conditional: 0, positive unconditional: 1926, negative: 37, negative conditional: 0, negative unconditional: 37, unknown: 2606, unknown conditional: 0, unknown unconditional: 2606] , Statistics on independence cache: Total cache size (in pairs): 242, Positive cache size: 232, Positive conditional cache size: 0, Positive unconditional cache size: 232, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 89]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 89]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 90]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 90]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 91]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 91]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 92]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 92]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 93]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 93]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 94]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 94]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 95]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 95]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 96]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 96]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 99]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 83]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 178 locations, 22 error locations. Started 1 CEGAR loops. OverallTime: 24777.7ms, OverallIterations: 11, TraceHistogramMax: 1, EmptinessCheckTime: 23.4ms, AutomataDifference: 1057.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15085.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 346 SDtfs, 393 SDslu, 113 SDs, 0 SdLazy, 226 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 584.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 354.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=643occurred in iteration=0, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 414.6ms AutomataMinimizationTime, 11 MinimizatonAttempts, 62 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 107.3ms SsaConstructionTime, 410.4ms SatisfiabilityAnalysisTime, 4704.8ms InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 160 ConstructedInterpolants, 20 QuantifiedInterpolants, 1746 SizeOfPredicates, 40 NumberOfNonLiveVariables, 627 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 22 InterpolantComputations, 22 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 18 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-13 21:37:45,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...