/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/list-simple/dll2n_update_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:27:35,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:27:35,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:27:35,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:27:35,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:27:35,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:27:35,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:27:35,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:27:35,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:27:35,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:27:35,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:27:35,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:27:35,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:27:35,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:27:35,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:27:35,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:27:35,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:27:35,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:27:35,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:27:35,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:27:35,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:27:35,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:27:35,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:27:35,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:27:35,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 16:27:35,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 16:27:35,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 16:27:35,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 16:27:35,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 16:27:35,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 16:27:35,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:27:35,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:27:35,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:27:35,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:27:35,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:27:35,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:27:35,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:27:35,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:27:35,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:27:35,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:27:35,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:27:35,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:27:35,450 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:27:35,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:27:35,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:27:35,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:27:35,452 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:27:35,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:27:35,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:27:35,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:27:35,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:27:35,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:27:35,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:27:35,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:27:35,454 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:27:35,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:27:35,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:27:35,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:27:35,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:27:35,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:27:35,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:27:35,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:27:35,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:27:35,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:27:35,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:27:35,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:27:35,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:27:35,457 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:27:35,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:27:35,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:27:35,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:27:35,872 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:27:35,873 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:27:35,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2021-01-06 16:27:35,960 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d32a752a7/cf73d663087d4745a8807459ca0b005f/FLAG727936676 [2021-01-06 16:27:36,557 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:27:36,558 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2021-01-06 16:27:36,572 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d32a752a7/cf73d663087d4745a8807459ca0b005f/FLAG727936676 [2021-01-06 16:27:36,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d32a752a7/cf73d663087d4745a8807459ca0b005f [2021-01-06 16:27:36,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:27:36,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:27:36,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:27:36,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:27:36,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:27:36,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:27:36" (1/1) ... [2021-01-06 16:27:36,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10657396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:27:36, skipping insertion in model container [2021-01-06 16:27:36,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:27:36" (1/1) ... [2021-01-06 16:27:36,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:27:36,971 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~temp~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~temp~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~temp~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[12],StructAccessExpression[IdentifierExpression[~temp~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~temp~0,],base],StructAccessExpression[IdentifierExpression[~temp~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~new_head~0,],base],StructAccessExpression[IdentifierExpression[~new_head~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~new_head~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~new_head~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~new_head~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[12],StructAccessExpression[IdentifierExpression[~new_head~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~head~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[12],StructAccessExpression[IdentifierExpression[~head~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~head~0,] left hand side expression in assignment: lhs: VariableLHS[~head,] left hand side expression in assignment: lhs: VariableLHS[~head,] left hand side expression in assignment: lhs: VariableLHS[~head,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~head,],base],StructAccessExpression[IdentifierExpression[~head,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:27:37,344 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i[24473,24486] [2021-01-06 16:27:37,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:27:37,356 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~temp~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~temp~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~temp~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[12],StructAccessExpression[IdentifierExpression[~temp~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~temp~0,],base],StructAccessExpression[IdentifierExpression[~temp~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~new_head~0,],base],StructAccessExpression[IdentifierExpression[~new_head~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~new_head~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~new_head~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~new_head~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[12],StructAccessExpression[IdentifierExpression[~new_head~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~head~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[12],StructAccessExpression[IdentifierExpression[~head~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~head~0,] left hand side expression in assignment: lhs: VariableLHS[~head,] left hand side expression in assignment: lhs: VariableLHS[~head,] left hand side expression in assignment: lhs: VariableLHS[~head,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~head,],base],StructAccessExpression[IdentifierExpression[~head,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 16:27:37,423 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i[24473,24486] [2021-01-06 16:27:37,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:27:37,512 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:27:37,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:27:37 WrapperNode [2021-01-06 16:27:37,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:27:37,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:27:37,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:27:37,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:27:37,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:27:37" (1/1) ... [2021-01-06 16:27:37,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:27:37" (1/1) ... [2021-01-06 16:27:37,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:27:37,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:27:37,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:27:37,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:27:37,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:27:37" (1/1) ... [2021-01-06 16:27:37,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:27:37" (1/1) ... [2021-01-06 16:27:37,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:27:37" (1/1) ... [2021-01-06 16:27:37,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:27:37" (1/1) ... [2021-01-06 16:27:37,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:27:37" (1/1) ... [2021-01-06 16:27:37,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:27:37" (1/1) ... [2021-01-06 16:27:37,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:27:37" (1/1) ... [2021-01-06 16:27:37,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:27:37,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:27:37,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:27:37,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:27:37,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:27:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:27:37,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:27:37,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:27:37,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 16:27:37,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-01-06 16:27:37,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:27:37,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-01-06 16:27:37,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:27:37,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:27:37,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:27:37,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:27:38,262 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:27:38,262 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-01-06 16:27:38,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:27:38 BoogieIcfgContainer [2021-01-06 16:27:38,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:27:38,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:27:38,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:27:38,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:27:38,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:27:36" (1/3) ... [2021-01-06 16:27:38,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3256b5bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:27:38, skipping insertion in model container [2021-01-06 16:27:38,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:27:37" (2/3) ... [2021-01-06 16:27:38,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3256b5bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:27:38, skipping insertion in model container [2021-01-06 16:27:38,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:27:38" (3/3) ... [2021-01-06 16:27:38,272 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_update_all_reverse.i [2021-01-06 16:27:38,279 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:27:38,283 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:27:38,302 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:27:38,328 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:27:38,328 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:27:38,328 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:27:38,328 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:27:38,329 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:27:38,329 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:27:38,329 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:27:38,329 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:27:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2021-01-06 16:27:38,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:27:38,352 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:27:38,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:27:38,353 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:27:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:27:38,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1608020802, now seen corresponding path program 1 times [2021-01-06 16:27:38,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:27:38,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830265377] [2021-01-06 16:27:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:27:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:27:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:27:38,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830265377] [2021-01-06 16:27:38,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:27:38,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:27:38,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75251010] [2021-01-06 16:27:38,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:27:38,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:27:38,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:27:38,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:27:38,594 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2021-01-06 16:27:38,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:27:38,630 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2021-01-06 16:27:38,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:27:38,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2021-01-06 16:27:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:27:38,641 INFO L225 Difference]: With dead ends: 56 [2021-01-06 16:27:38,642 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:27:38,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:27:38,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:27:38,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-01-06 16:27:38,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 16:27:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-01-06 16:27:38,684 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 13 [2021-01-06 16:27:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:27:38,684 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-01-06 16:27:38,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:27:38,685 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-01-06 16:27:38,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:27:38,685 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:27:38,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:27:38,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:27:38,686 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:27:38,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:27:38,687 INFO L82 PathProgramCache]: Analyzing trace with hash -780239213, now seen corresponding path program 1 times [2021-01-06 16:27:38,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:27:38,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433237539] [2021-01-06 16:27:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:27:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:27:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:27:38,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433237539] [2021-01-06 16:27:38,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:27:38,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:27:38,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742704683] [2021-01-06 16:27:38,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:27:38,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:27:38,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:27:38,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:27:38,769 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 3 states. [2021-01-06 16:27:38,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:27:38,799 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-01-06 16:27:38,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:27:38,800 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-01-06 16:27:38,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:27:38,801 INFO L225 Difference]: With dead ends: 47 [2021-01-06 16:27:38,801 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:27:38,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:27:38,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:27:38,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-01-06 16:27:38,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:27:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-01-06 16:27:38,808 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2021-01-06 16:27:38,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:27:38,808 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-01-06 16:27:38,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:27:38,809 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-01-06 16:27:38,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:27:38,810 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:27:38,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:27:38,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:27:38,810 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:27:38,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:27:38,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1367045227, now seen corresponding path program 1 times [2021-01-06 16:27:38,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:27:38,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795302268] [2021-01-06 16:27:38,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:27:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:27:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:27:38,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795302268] [2021-01-06 16:27:38,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647541259] [2021-01-06 16:27:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:27:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:27:39,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:27:39,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:27:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:27:39,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:27:39,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:27:39,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708564193] [2021-01-06 16:27:39,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:27:39,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:27:39,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:27:39,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:27:39,091 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2021-01-06 16:27:39,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:27:39,117 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2021-01-06 16:27:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:27:39,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2021-01-06 16:27:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:27:39,119 INFO L225 Difference]: With dead ends: 43 [2021-01-06 16:27:39,120 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 16:27:39,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:27:39,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 16:27:39,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 16:27:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 16:27:39,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-01-06 16:27:39,126 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-01-06 16:27:39,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:27:39,126 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-01-06 16:27:39,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:27:39,126 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-01-06 16:27:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:27:39,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:27:39,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:27:39,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:27:39,343 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:27:39,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:27:39,345 INFO L82 PathProgramCache]: Analyzing trace with hash 980561436, now seen corresponding path program 1 times [2021-01-06 16:27:39,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:27:39,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164903113] [2021-01-06 16:27:39,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:27:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:27:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 16:27:39,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164903113] [2021-01-06 16:27:39,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:27:39,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:27:39,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680631819] [2021-01-06 16:27:39,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:27:39,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:27:39,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:27:39,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:27:39,444 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2021-01-06 16:27:39,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:27:39,485 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-01-06 16:27:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:27:39,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-01-06 16:27:39,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:27:39,486 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:27:39,486 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 16:27:39,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:27:39,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 16:27:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 16:27:39,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 16:27:39,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 16:27:39,488 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-01-06 16:27:39,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:27:39,489 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 16:27:39,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:27:39,489 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 16:27:39,489 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 16:27:39,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 16:27:39,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 16:27:39,542 INFO L189 CegarLoopUtils]: For program point L589(lines 589 591) no Hoare annotation was computed. [2021-01-06 16:27:39,542 INFO L189 CegarLoopUtils]: For program point L589-1(lines 589 591) no Hoare annotation was computed. [2021-01-06 16:27:39,542 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 16:27:39,542 INFO L192 CegarLoopUtils]: At program point L573(line 573) the Hoare annotation is: true [2021-01-06 16:27:39,542 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 16:27:39,543 INFO L185 CegarLoopUtils]: At program point L615(lines 610 616) the Hoare annotation is: false [2021-01-06 16:27:39,543 INFO L189 CegarLoopUtils]: For program point L633-2(lines 633 638) no Hoare annotation was computed. [2021-01-06 16:27:39,543 INFO L185 CegarLoopUtils]: At program point L633-3(lines 633 638) the Hoare annotation is: (and (<= ULTIMATE.start_main_~len~0 (+ ULTIMATE.start_main_~i~0 1)) (= 2 ULTIMATE.start_main_~len~0)) [2021-01-06 16:27:39,543 INFO L189 CegarLoopUtils]: For program point L633-4(lines 633 638) no Hoare annotation was computed. [2021-01-06 16:27:39,543 INFO L189 CegarLoopUtils]: For program point L617(lines 1 643) no Hoare annotation was computed. [2021-01-06 16:27:39,544 INFO L192 CegarLoopUtils]: At program point L642(lines 624 643) the Hoare annotation is: true [2021-01-06 16:27:39,544 INFO L185 CegarLoopUtils]: At program point L601(lines 585 602) the Hoare annotation is: (= ULTIMATE.start_main_~len~0 2) [2021-01-06 16:27:39,544 INFO L185 CegarLoopUtils]: At program point L618-2(lines 618 621) the Hoare annotation is: (= 2 ULTIMATE.start_main_~len~0) [2021-01-06 16:27:39,544 INFO L189 CegarLoopUtils]: For program point L618-3(lines 618 621) no Hoare annotation was computed. [2021-01-06 16:27:39,544 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 16:27:39,544 INFO L189 CegarLoopUtils]: For program point L635(lines 635 637) no Hoare annotation was computed. [2021-01-06 16:27:39,545 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 641) no Hoare annotation was computed. [2021-01-06 16:27:39,545 INFO L185 CegarLoopUtils]: At program point L611-2(lines 611 614) the Hoare annotation is: false [2021-01-06 16:27:39,545 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 16:27:39,545 INFO L189 CegarLoopUtils]: For program point L611-3(lines 611 614) no Hoare annotation was computed. [2021-01-06 16:27:39,545 INFO L185 CegarLoopUtils]: At program point L636(lines 624 643) the Hoare annotation is: false [2021-01-06 16:27:39,546 INFO L189 CegarLoopUtils]: For program point L603(lines 603 609) no Hoare annotation was computed. [2021-01-06 16:27:39,546 INFO L189 CegarLoopUtils]: For program point L595(lines 595 597) no Hoare annotation was computed. [2021-01-06 16:27:39,546 INFO L189 CegarLoopUtils]: For program point L595-2(lines 595 597) no Hoare annotation was computed. [2021-01-06 16:27:39,546 INFO L185 CegarLoopUtils]: At program point L587-2(lines 587 600) the Hoare annotation is: (= 2 ULTIMATE.start_main_~len~0) [2021-01-06 16:27:39,546 INFO L189 CegarLoopUtils]: For program point L587-3(lines 587 600) no Hoare annotation was computed. [2021-01-06 16:27:39,546 INFO L192 CegarLoopUtils]: At program point L604-2(lines 604 608) the Hoare annotation is: true [2021-01-06 16:27:39,547 INFO L185 CegarLoopUtils]: At program point L629-2(lines 629 632) the Hoare annotation is: (= 2 ULTIMATE.start_main_~len~0) [2021-01-06 16:27:39,547 INFO L189 CegarLoopUtils]: For program point L629-3(lines 629 632) no Hoare annotation was computed. [2021-01-06 16:27:39,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:27:39 BoogieIcfgContainer [2021-01-06 16:27:39,565 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:27:39,566 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:27:39,566 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:27:39,566 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:27:39,567 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:27:38" (3/4) ... [2021-01-06 16:27:39,571 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 16:27:39,585 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-01-06 16:27:39,585 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-01-06 16:27:39,585 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:27:39,586 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:27:39,643 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/list-simple/dll2n_update_all_reverse.i-witness.graphml [2021-01-06 16:27:39,643 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:27:39,645 INFO L168 Benchmark]: Toolchain (without parser) took 2765.59 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 124.5 MB in the beginning and 155.9 MB in the end (delta: -31.5 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-01-06 16:27:39,646 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:27:39,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 632.04 ms. Allocated memory is still 151.0 MB. Free memory was 124.2 MB in the beginning and 101.1 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:27:39,647 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.74 ms. Allocated memory is still 151.0 MB. Free memory was 101.1 MB in the beginning and 99.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:27:39,650 INFO L168 Benchmark]: Boogie Preprocessor took 135.05 ms. Allocated memory is still 151.0 MB. Free memory was 99.0 MB in the beginning and 133.1 MB in the end (delta: -34.1 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. [2021-01-06 16:27:39,651 INFO L168 Benchmark]: RCFGBuilder took 517.53 ms. Allocated memory is still 151.0 MB. Free memory was 133.1 MB in the beginning and 111.0 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:27:39,651 INFO L168 Benchmark]: TraceAbstraction took 1300.01 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 111.0 MB in the beginning and 159.1 MB in the end (delta: -48.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:27:39,652 INFO L168 Benchmark]: Witness Printer took 77.03 ms. Allocated memory is still 186.6 MB. Free memory was 159.1 MB in the beginning and 155.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:27:39,658 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 632.04 ms. Allocated memory is still 151.0 MB. Free memory was 124.2 MB in the beginning and 101.1 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 94.74 ms. Allocated memory is still 151.0 MB. Free memory was 101.1 MB in the beginning and 99.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 135.05 ms. Allocated memory is still 151.0 MB. Free memory was 99.0 MB in the beginning and 133.1 MB in the end (delta: -34.1 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 517.53 ms. Allocated memory is still 151.0 MB. Free memory was 133.1 MB in the beginning and 111.0 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1300.01 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 111.0 MB in the beginning and 159.1 MB in the end (delta: -48.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 77.03 ms. Allocated memory is still 186.6 MB. Free memory was 159.1 MB in the beginning and 155.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 641]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 585]: Loop Invariant Derived loop invariant: len == 2 - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 2 == len - InvariantResult [Line: 629]: Loop Invariant Derived loop invariant: 2 == len - InvariantResult [Line: 618]: Loop Invariant Derived loop invariant: 2 == len - InvariantResult [Line: 573]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 624]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 610]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 624]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 611]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 633]: Loop Invariant Derived loop invariant: len <= i + 1 && 2 == len - InvariantResult [Line: 604]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 33 SDslu, 107 SDs, 0 SdLazy, 26 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 4 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 11 PreInvPairs, 23 NumberOfFragments, 27 HoareAnnotationTreeSize, 11 FomulaSimplifications, 21 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 20 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 3083 SizeOfPredicates, 2 NumberOfNonLiveVariables, 109 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 8/10 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 correct! Received shutdown request...