/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops/invert_string-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 17:34:18,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 17:34:18,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 17:34:18,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 17:34:18,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 17:34:18,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 17:34:18,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 17:34:18,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 17:34:18,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 17:34:18,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 17:34:18,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 17:34:18,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 17:34:18,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 17:34:18,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 17:34:18,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 17:34:18,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 17:34:18,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 17:34:18,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 17:34:18,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 17:34:18,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 17:34:18,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 17:34:18,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 17:34:18,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 17:34:18,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 17:34:18,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 17:34:18,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 17:34:18,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 17:34:18,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 17:34:18,723 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 17:34:18,789 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 17:34:18,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 17:34:18,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 17:34:18,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 17:34:18,796 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 17:34:18,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 17:34:18,797 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 17:34:18,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 17:34:18,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 17:34:18,798 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 17:34:18,799 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 17:34:18,800 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 17:34:18,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 17:34:18,800 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 17:34:18,800 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 17:34:18,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 17:34:18,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 17:34:18,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 17:34:18,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:34:18,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 17:34:18,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 17:34:18,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 17:34:18,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 17:34:18,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 17:34:18,803 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 17:34:19,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 17:34:19,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 17:34:19,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 17:34:19,311 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 17:34:19,312 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 17:34:19,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/invert_string-2.c [2020-12-23 17:34:19,422 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c3f1e6237/6f521d48fa9e4b9fbe87772393959f26/FLAG3cc551f42 [2020-12-23 17:34:20,110 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 17:34:20,111 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/invert_string-2.c [2020-12-23 17:34:20,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c3f1e6237/6f521d48fa9e4b9fbe87772393959f26/FLAG3cc551f42 [2020-12-23 17:34:20,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c3f1e6237/6f521d48fa9e4b9fbe87772393959f26 [2020-12-23 17:34:20,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 17:34:20,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 17:34:20,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 17:34:20,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 17:34:20,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 17:34:20,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:34:20" (1/1) ... [2020-12-23 17:34:20,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ed46bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:34:20, skipping insertion in model container [2020-12-23 17:34:20,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:34:20" (1/1) ... [2020-12-23 17:34:20,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 17:34:20,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 17:34:20,724 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/loops/invert_string-2.c[327,340] left hand side expression in assignment: lhs: VariableLHS[~cont~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~str1~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~str1~0,],[BinaryExpression[ARITHMINUS,IdentifierExpression[~MAX~0,],IntegerLiteral[1]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~str2~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 17:34:20,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:34:20,766 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 17:34:20,783 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/loops/invert_string-2.c[327,340] left hand side expression in assignment: lhs: VariableLHS[~cont~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#str1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#str1~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#str1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#str1~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~MAX~0,],IntegerLiteral[1]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#str2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#str2~0,],offset],IdentifierExpression[~j~0,]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 17:34:20,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:34:20,816 INFO L208 MainTranslator]: Completed translation [2020-12-23 17:34:20,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:34:20 WrapperNode [2020-12-23 17:34:20,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 17:34:20,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 17:34:20,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 17:34:20,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 17:34:20,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:34:20" (1/1) ... [2020-12-23 17:34:20,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:34:20" (1/1) ... [2020-12-23 17:34:20,871 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 17:34:20,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 17:34:20,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 17:34:20,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 17:34:20,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:34:20" (1/1) ... [2020-12-23 17:34:20,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:34:20" (1/1) ... [2020-12-23 17:34:20,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:34:20" (1/1) ... [2020-12-23 17:34:20,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:34:20" (1/1) ... [2020-12-23 17:34:20,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:34:20" (1/1) ... [2020-12-23 17:34:20,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:34:20" (1/1) ... [2020-12-23 17:34:20,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:34:20" (1/1) ... [2020-12-23 17:34:20,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 17:34:20,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 17:34:20,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 17:34:20,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 17:34:20,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:34:20" (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 [2020-12-23 17:34:21,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 17:34:21,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 17:34:21,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 17:34:21,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 17:34:21,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 17:34:21,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 17:34:21,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 17:34:21,650 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 17:34:21,650 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 17:34:21,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:34:21 BoogieIcfgContainer [2020-12-23 17:34:21,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 17:34:21,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 17:34:21,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 17:34:21,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 17:34:21,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 05:34:20" (1/3) ... [2020-12-23 17:34:21,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2809ff48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:34:21, skipping insertion in model container [2020-12-23 17:34:21,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:34:20" (2/3) ... [2020-12-23 17:34:21,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2809ff48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:34:21, skipping insertion in model container [2020-12-23 17:34:21,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:34:21" (3/3) ... [2020-12-23 17:34:21,665 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-2.c [2020-12-23 17:34:21,672 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 17:34:21,678 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 14 error locations. [2020-12-23 17:34:21,701 INFO L253 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2020-12-23 17:34:21,732 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 17:34:21,732 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 17:34:21,732 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 17:34:21,732 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 17:34:21,733 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 17:34:21,733 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 17:34:21,733 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 17:34:21,733 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 17:34:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-12-23 17:34:21,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 17:34:21,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:34:21,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 17:34:21,761 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 17:34:21,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:34:21,770 INFO L82 PathProgramCache]: Analyzing trace with hash 926022, now seen corresponding path program 1 times [2020-12-23 17:34:21,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:34:21,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892564499] [2020-12-23 17:34:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:34:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:34:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:34:21,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892564499] [2020-12-23 17:34:21,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:34:21,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:34:21,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799923136] [2020-12-23 17:34:21,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 17:34:21,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:34:22,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 17:34:22,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 17:34:22,021 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-12-23 17:34:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:34:22,041 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-23 17:34:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 17:34:22,043 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-23 17:34:22,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:34:22,055 INFO L225 Difference]: With dead ends: 40 [2020-12-23 17:34:22,056 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 17:34:22,059 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 [2020-12-23 17:34:22,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 17:34:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 17:34:22,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 17:34:22,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-23 17:34:22,107 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 4 [2020-12-23 17:34:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:34:22,107 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-23 17:34:22,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 17:34:22,108 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-23 17:34:22,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 17:34:22,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:34:22,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 17:34:22,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 17:34:22,110 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 17:34:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:34:22,111 INFO L82 PathProgramCache]: Analyzing trace with hash 925712, now seen corresponding path program 1 times [2020-12-23 17:34:22,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:34:22,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203650253] [2020-12-23 17:34:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:34:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:34:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:34:22,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203650253] [2020-12-23 17:34:22,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:34:22,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:34:22,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379025371] [2020-12-23 17:34:22,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:34:22,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:34:22,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:34:22,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:34:22,228 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 3 states. [2020-12-23 17:34:22,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:34:22,367 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-23 17:34:22,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:34:22,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 17:34:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:34:22,375 INFO L225 Difference]: With dead ends: 34 [2020-12-23 17:34:22,376 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 17:34:22,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:34:22,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 17:34:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-23 17:34:22,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 17:34:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-23 17:34:22,395 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 4 [2020-12-23 17:34:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:34:22,396 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-23 17:34:22,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:34:22,397 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-23 17:34:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 17:34:22,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:34:22,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 17:34:22,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 17:34:22,400 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 17:34:22,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:34:22,404 INFO L82 PathProgramCache]: Analyzing trace with hash 925713, now seen corresponding path program 1 times [2020-12-23 17:34:22,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:34:22,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773089446] [2020-12-23 17:34:22,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:34:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 17:34:22,473 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 17:34:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 17:34:22,506 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 17:34:22,535 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 17:34:22,536 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 17:34:22,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 17:34:22,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 05:34:22 BoogieIcfgContainer [2020-12-23 17:34:22,563 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 17:34:22,564 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 17:34:22,565 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 17:34:22,565 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 17:34:22,566 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:34:21" (3/4) ... [2020-12-23 17:34:22,568 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 17:34:22,617 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/invert_string-2.c-witness.graphml [2020-12-23 17:34:22,618 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 17:34:22,621 INFO L168 Benchmark]: Toolchain (without parser) took 2160.93 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 95.7 MB in the end (delta: 31.1 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. [2020-12-23 17:34:22,622 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 17:34:22,623 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.61 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 17:34:22,624 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.93 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 17:34:22,625 INFO L168 Benchmark]: Boogie Preprocessor took 31.79 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 113.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:34:22,626 INFO L168 Benchmark]: RCFGBuilder took 746.98 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 127.7 MB in the end (delta: -13.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-12-23 17:34:22,626 INFO L168 Benchmark]: TraceAbstraction took 909.19 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 97.3 MB in the end (delta: 29.9 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. [2020-12-23 17:34:22,627 INFO L168 Benchmark]: Witness Printer took 53.52 ms. Allocated memory is still 151.0 MB. Free memory was 97.3 MB in the beginning and 95.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:34:22,632 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 356.61 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 52.93 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.79 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 113.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 746.98 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 127.7 MB in the end (delta: -13.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 909.19 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 97.3 MB in the end (delta: 29.9 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. * Witness Printer took 53.52 ms. Allocated memory is still 151.0 MB. Free memory was 97.3 MB in the beginning and 95.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 23]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L15] int MAX = __VERIFIER_nondet_uint(); [L16] char str1[MAX], str2[MAX]; [L17] int cont, i, j; [L18] cont = 0 [L20] i=0 [L20] COND FALSE !(i