/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/forester-heap/dll-token-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:56:24,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:56:24,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:56:24,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 03:56:24,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 03:56:24,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 03:56:24,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 03:56:24,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 03:56:24,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 03:56:25,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 03:56:25,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 03:56:25,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 03:56:25,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:56:25,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:56:25,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:56:25,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:56:25,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:56:25,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:56:25,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:56:25,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:56:25,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:56:25,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:56:25,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:56:25,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:56:25,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:56:25,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 03:56:25,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 03:56:25,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 03:56:25,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 03:56:25,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 03:56:25,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 03:56:25,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 03:56:25,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 03:56:25,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:56:25,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:56:25,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:56:25,074 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:56:25,145 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:56:25,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:56:25,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:56:25,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:56:25,149 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:56:25,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:56:25,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:56:25,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:56:25,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:56:25,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:56:25,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:56:25,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:56:25,152 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:56:25,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:56:25,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:56:25,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:56:25,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:56:25,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:56:25,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:56:25,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:56:25,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:56:25,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:56:25,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:56:25,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:56:25,155 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:56:25,155 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:56:25,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:56:25,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:56:25,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:56:25,656 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:56:25,657 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:56:25,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-token-2.i [2020-12-22 03:56:25,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b4d82129/70a90726ef034899b03209377e9a77d2/FLAG2a0ad93ba [2020-12-22 03:56:26,609 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:56:26,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-2.i [2020-12-22 03:56:26,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b4d82129/70a90726ef034899b03209377e9a77d2/FLAG2a0ad93ba [2020-12-22 03:56:26,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b4d82129/70a90726ef034899b03209377e9a77d2 [2020-12-22 03:56:26,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:56:26,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:56:26,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:56:26,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:56:26,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:56:26,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:56:26" (1/1) ... [2020-12-22 03:56:26,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4802c316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:56:26, skipping insertion in model container [2020-12-22 03:56:26,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:56:26" (1/1) ... [2020-12-22 03:56:26,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:56:26,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:56:27,254 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-2.i[22229,22242] [2020-12-22 03:56:27,269 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-2.i[22398,22411] [2020-12-22 03:56:27,271 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-2.i[22489,22502] [2020-12-22 03:56:27,272 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-2.i[22571,22584] [2020-12-22 03:56:27,274 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-2.i[22649,22662] [2020-12-22 03:56:27,276 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-2.i[22795,22808] [2020-12-22 03:56:27,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:56:27,289 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:56:27,331 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-2.i[22229,22242] [2020-12-22 03:56:27,334 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-2.i[22398,22411] [2020-12-22 03:56:27,335 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-2.i[22489,22502] [2020-12-22 03:56:27,336 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-2.i[22571,22584] [2020-12-22 03:56:27,337 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-2.i[22649,22662] [2020-12-22 03:56:27,339 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-2.i[22795,22808] [2020-12-22 03:56:27,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:56:27,407 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:56:27,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:56:27 WrapperNode [2020-12-22 03:56:27,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:56:27,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:56:27,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:56:27,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:56:27,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:56:27" (1/1) ... [2020-12-22 03:56:27,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:56:27" (1/1) ... [2020-12-22 03:56:27,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:56:27,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:56:27,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:56:27,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:56:27,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:56:27" (1/1) ... [2020-12-22 03:56:27,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:56:27" (1/1) ... [2020-12-22 03:56:27,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:56:27" (1/1) ... [2020-12-22 03:56:27,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:56:27" (1/1) ... [2020-12-22 03:56:27,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:56:27" (1/1) ... [2020-12-22 03:56:27,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:56:27" (1/1) ... [2020-12-22 03:56:27,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:56:27" (1/1) ... [2020-12-22 03:56:27,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:56:27,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:56:27,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:56:27,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:56:27,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:56:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:56:27,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:56:27,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:56:27,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 03:56:27,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 03:56:27,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:56:27,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 03:56:27,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 03:56:27,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:56:27,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:56:27,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:56:28,172 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:56:28,173 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 03:56:28,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:56:28 BoogieIcfgContainer [2020-12-22 03:56:28,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:56:28,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:56:28,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:56:28,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:56:28,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:56:26" (1/3) ... [2020-12-22 03:56:28,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29bac4e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:56:28, skipping insertion in model container [2020-12-22 03:56:28,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:56:27" (2/3) ... [2020-12-22 03:56:28,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29bac4e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:56:28, skipping insertion in model container [2020-12-22 03:56:28,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:56:28" (3/3) ... [2020-12-22 03:56:28,187 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-token-2.i [2020-12-22 03:56:28,196 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:56:28,203 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-22 03:56:28,228 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-22 03:56:28,319 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:56:28,319 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:56:28,319 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:56:28,320 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:56:28,320 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:56:28,320 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:56:28,320 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:56:28,320 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:56:28,339 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-22 03:56:28,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 03:56:28,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:56:28,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 03:56:28,346 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:56:28,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:56:28,353 INFO L82 PathProgramCache]: Analyzing trace with hash 890337990, now seen corresponding path program 1 times [2020-12-22 03:56:28,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:56:28,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345509792] [2020-12-22 03:56:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:56:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:56:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:56:28,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345509792] [2020-12-22 03:56:28,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:56:28,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:56:28,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854552228] [2020-12-22 03:56:28,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:56:28,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:56:28,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:56:28,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:56:28,688 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2020-12-22 03:56:28,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:56:28,712 INFO L93 Difference]: Finished difference Result 86 states and 132 transitions. [2020-12-22 03:56:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:56:28,714 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-22 03:56:28,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:56:28,724 INFO L225 Difference]: With dead ends: 86 [2020-12-22 03:56:28,724 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 03:56:28,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:56:28,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 03:56:28,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-22 03:56:28,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 03:56:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-12-22 03:56:28,773 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 6 [2020-12-22 03:56:28,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:56:28,774 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-12-22 03:56:28,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:56:28,774 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-12-22 03:56:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 03:56:28,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:56:28,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 03:56:28,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:56:28,775 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:56:28,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:56:28,777 INFO L82 PathProgramCache]: Analyzing trace with hash 889571369, now seen corresponding path program 1 times [2020-12-22 03:56:28,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:56:28,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338174327] [2020-12-22 03:56:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:56:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:56:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:56:28,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338174327] [2020-12-22 03:56:28,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:56:28,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 03:56:28,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646485468] [2020-12-22 03:56:28,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 03:56:28,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:56:28,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 03:56:28,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 03:56:28,903 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 4 states. [2020-12-22 03:56:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:56:29,000 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-22 03:56:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:56:29,000 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 03:56:29,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:56:29,003 INFO L225 Difference]: With dead ends: 39 [2020-12-22 03:56:29,003 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 03:56:29,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:56:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 03:56:29,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-22 03:56:29,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 03:56:29,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-12-22 03:56:29,018 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 6 [2020-12-22 03:56:29,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:56:29,018 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-12-22 03:56:29,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 03:56:29,019 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-12-22 03:56:29,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 03:56:29,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:56:29,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:56:29,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:56:29,021 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:56:29,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:56:29,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1806865149, now seen corresponding path program 1 times [2020-12-22 03:56:29,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:56:29,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455419742] [2020-12-22 03:56:29,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:56:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:56:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:56:29,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455419742] [2020-12-22 03:56:29,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:56:29,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 03:56:29,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550999050] [2020-12-22 03:56:29,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 03:56:29,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:56:29,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 03:56:29,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 03:56:29,164 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states. [2020-12-22 03:56:29,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:56:29,255 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-12-22 03:56:29,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:56:29,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 03:56:29,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:56:29,257 INFO L225 Difference]: With dead ends: 63 [2020-12-22 03:56:29,257 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 03:56:29,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:56:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 03:56:29,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2020-12-22 03:56:29,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 03:56:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-12-22 03:56:29,265 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 7 [2020-12-22 03:56:29,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:56:29,265 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-12-22 03:56:29,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 03:56:29,266 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-12-22 03:56:29,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:56:29,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:56:29,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:56:29,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:56:29,267 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:56:29,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:56:29,268 INFO L82 PathProgramCache]: Analyzing trace with hash -913382283, now seen corresponding path program 1 times [2020-12-22 03:56:29,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:56:29,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424885945] [2020-12-22 03:56:29,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:56:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:56:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:56:29,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424885945] [2020-12-22 03:56:29,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:56:29,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:56:29,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144750281] [2020-12-22 03:56:29,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:56:29,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:56:29,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:56:29,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:56:29,349 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 5 states. [2020-12-22 03:56:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:56:29,463 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-22 03:56:29,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:56:29,464 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-22 03:56:29,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:56:29,465 INFO L225 Difference]: With dead ends: 35 [2020-12-22 03:56:29,465 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 03:56:29,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:56:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 03:56:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-22 03:56:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 03:56:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-22 03:56:29,471 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 12 [2020-12-22 03:56:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:56:29,471 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-22 03:56:29,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:56:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-22 03:56:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:56:29,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:56:29,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:56:29,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 03:56:29,473 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:56:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:56:29,474 INFO L82 PathProgramCache]: Analyzing trace with hash -913344547, now seen corresponding path program 1 times [2020-12-22 03:56:29,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:56:29,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363491869] [2020-12-22 03:56:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:56:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:56:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:56:29,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363491869] [2020-12-22 03:56:29,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:56:29,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:56:29,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107391548] [2020-12-22 03:56:29,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:56:29,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:56:29,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:56:29,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:56:29,603 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 5 states. [2020-12-22 03:56:29,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:56:29,777 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2020-12-22 03:56:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:56:29,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-22 03:56:29,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:56:29,779 INFO L225 Difference]: With dead ends: 68 [2020-12-22 03:56:29,779 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 03:56:29,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:56:29,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 03:56:29,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-12-22 03:56:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 03:56:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-12-22 03:56:29,815 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 12 [2020-12-22 03:56:29,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:56:29,816 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-12-22 03:56:29,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:56:29,816 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-12-22 03:56:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 03:56:29,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:56:29,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:56:29,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 03:56:29,817 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:56:29,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:56:29,818 INFO L82 PathProgramCache]: Analyzing trace with hash -313255267, now seen corresponding path program 1 times [2020-12-22 03:56:29,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:56:29,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768848368] [2020-12-22 03:56:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:56:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:56:29,847 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:56:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:56:29,870 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:56:29,898 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:56:29,898 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:56:29,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 03:56:29,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:56:29 BoogieIcfgContainer [2020-12-22 03:56:29,933 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:56:29,933 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:56:29,933 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:56:29,934 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:56:29,934 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:56:28" (3/4) ... [2020-12-22 03:56:29,937 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 03:56:29,998 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/forester-heap/dll-token-2.i-witness.graphml [2020-12-22 03:56:29,998 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:56:30,000 INFO L168 Benchmark]: Toolchain (without parser) took 3156.38 ms. Allocated memory was 151.0 MB in the beginning and 208.7 MB in the end (delta: 57.7 MB). Free memory was 125.3 MB in the beginning and 179.3 MB in the end (delta: -54.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-22 03:56:30,002 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 125.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:56:30,003 INFO L168 Benchmark]: CACSL2BoogieTranslator took 558.93 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 102.3 MB in the end (delta: 22.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:56:30,004 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.08 ms. Allocated memory is still 151.0 MB. Free memory was 102.3 MB in the beginning and 100.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:56:30,005 INFO L168 Benchmark]: Boogie Preprocessor took 81.07 ms. Allocated memory is still 151.0 MB. Free memory was 100.3 MB in the beginning and 98.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:56:30,005 INFO L168 Benchmark]: RCFGBuilder took 606.58 ms. Allocated memory is still 151.0 MB. Free memory was 98.7 MB in the beginning and 74.1 MB in the end (delta: 24.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. [2020-12-22 03:56:30,014 INFO L168 Benchmark]: TraceAbstraction took 1754.91 ms. Allocated memory was 151.0 MB in the beginning and 208.7 MB in the end (delta: 57.7 MB). Free memory was 73.7 MB in the beginning and 181.4 MB in the end (delta: -107.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:56:30,014 INFO L168 Benchmark]: Witness Printer took 64.69 ms. Allocated memory is still 208.7 MB. Free memory was 181.4 MB in the beginning and 179.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:56:30,021 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 125.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 558.93 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 102.3 MB in the end (delta: 22.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 74.08 ms. Allocated memory is still 151.0 MB. Free memory was 102.3 MB in the beginning and 100.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 81.07 ms. Allocated memory is still 151.0 MB. Free memory was 100.3 MB in the beginning and 98.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 606.58 ms. Allocated memory is still 151.0 MB. Free memory was 98.7 MB in the beginning and 74.1 MB in the end (delta: 24.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1754.91 ms. Allocated memory was 151.0 MB in the beginning and 208.7 MB in the end (delta: 57.7 MB). Free memory was 73.7 MB in the beginning and 181.4 MB in the end (delta: -107.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 64.69 ms. Allocated memory is still 208.7 MB. Free memory was 181.4 MB in the beginning and 179.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1037]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1004] SLL* head = malloc(sizeof(SLL)); [L1005] head->next = ((void*)0) [L1006] head->prev = ((void*)0) [L1007] head->data = 0 [L1009] SLL* x = head; [L1012] COND FALSE !(__VERIFIER_nondet_int()) [L1021] x->data = 1 [L1022] x->next = malloc(sizeof(SLL)) [L1023] EXPR x->next [L1023] x->next->prev = x [L1024] EXPR x->next [L1024] x->next->data = 2 [L1026] x = head [L1028] COND FALSE !(!(((void*)0) != x)) [L1030] EXPR x->data [L1030] COND FALSE !(1 != x->data) [L1035] EXPR x->data [L1035] COND FALSE !(!(1 == x->data)) [L1036] EXPR x->next [L1036] x = x->next [L1037] EXPR x->data [L1037] COND TRUE !(2 != x->data) [L1037] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 44 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 164 SDtfs, 91 SDslu, 179 SDs, 0 SdLazy, 152 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 30 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 1577 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...