./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/scopes4-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-ext3/scopes4-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 25981771a012eec333f97d8302486eae22970d9e ............................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 06:17:10,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:17:10,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:17:10,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:17:10,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:17:10,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:17:10,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:17:10,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:17:10,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:17:10,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:17:10,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:17:10,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:17:10,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:17:10,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:17:10,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:17:10,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:17:10,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:17:10,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:17:10,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:17:10,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:17:10,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:17:10,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:17:10,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:17:10,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:17:10,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:17:10,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:17:10,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:17:10,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:17:10,659 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:17:10,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:17:10,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:17:10,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:17:10,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:17:10,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:17:10,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:17:10,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:17:10,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:17:10,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:17:10,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:17:10,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:17:10,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:17:10,668 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-20 06:17:10,712 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:17:10,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:17:10,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:17:10,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:17:10,715 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:17:10,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:17:10,715 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:17:10,716 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:17:10,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:17:10,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:17:10,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:17:10,717 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 06:17:10,717 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 06:17:10,718 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 06:17:10,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:17:10,718 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 06:17:10,719 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:17:10,719 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:17:10,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:17:10,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:17:10,720 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:17:10,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:17:10,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:17:10,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:17:10,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:17:10,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:17:10,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:17:10,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:17:10,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25981771a012eec333f97d8302486eae22970d9e [2020-10-20 06:17:10,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:17:10,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:17:10,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:17:10,950 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:17:10,951 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:17:10,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/scopes4-2.c [2020-10-20 06:17:11,023 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a36718a3/0c8f7d77afce48a3935f3f17ac933dbe/FLAGb1170f929 [2020-10-20 06:17:11,553 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:17:11,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/scopes4-2.c [2020-10-20 06:17:11,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a36718a3/0c8f7d77afce48a3935f3f17ac933dbe/FLAGb1170f929 [2020-10-20 06:17:11,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a36718a3/0c8f7d77afce48a3935f3f17ac933dbe [2020-10-20 06:17:11,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:17:11,865 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 06:17:11,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:17:11,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:17:11,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:17:11,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:17:11" (1/1) ... [2020-10-20 06:17:11,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54cd7692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:11, skipping insertion in model container [2020-10-20 06:17:11,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:17:11" (1/1) ... [2020-10-20 06:17:11,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:17:11,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:17:12,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:17:12,080 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:17:12,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:17:12,111 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:17:12,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:12 WrapperNode [2020-10-20 06:17:12,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:17:12,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:17:12,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:17:12,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:17:12,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:12" (1/1) ... [2020-10-20 06:17:12,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:12" (1/1) ... [2020-10-20 06:17:12,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:12" (1/1) ... [2020-10-20 06:17:12,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:12" (1/1) ... [2020-10-20 06:17:12,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:12" (1/1) ... [2020-10-20 06:17:12,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:12" (1/1) ... [2020-10-20 06:17:12,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:12" (1/1) ... [2020-10-20 06:17:12,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:17:12,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:17:12,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:17:12,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:17:12,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:17:12,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 06:17:12,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:17:12,207 INFO L138 BoogieDeclarations]: Found implementation of procedure foo2 [2020-10-20 06:17:12,207 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-20 06:17:12,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 06:17:12,207 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-10-20 06:17:12,208 INFO L130 BoogieDeclarations]: Found specification of procedure foo2 [2020-10-20 06:17:12,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:17:12,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 06:17:12,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 06:17:12,208 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-20 06:17:12,209 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 06:17:12,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 06:17:12,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 06:17:12,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 06:17:12,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:17:12,411 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:17:12,412 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-20 06:17:12,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:17:12 BoogieIcfgContainer [2020-10-20 06:17:12,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:17:12,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:17:12,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:17:12,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:17:12,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:17:11" (1/3) ... [2020-10-20 06:17:12,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6aa3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:17:12, skipping insertion in model container [2020-10-20 06:17:12,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:12" (2/3) ... [2020-10-20 06:17:12,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6aa3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:17:12, skipping insertion in model container [2020-10-20 06:17:12,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:17:12" (3/3) ... [2020-10-20 06:17:12,429 INFO L111 eAbstractionObserver]: Analyzing ICFG scopes4-2.c [2020-10-20 06:17:12,441 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:17:12,452 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-10-20 06:17:12,471 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-20 06:17:12,499 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:17:12,499 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 06:17:12,499 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:17:12,500 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:17:12,500 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:17:12,500 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:17:12,501 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:17:12,501 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:17:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-20 06:17:12,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 06:17:12,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:12,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:12,531 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2020-10-20 06:17:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:12,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1728099290, now seen corresponding path program 1 times [2020-10-20 06:17:12,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:12,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308297287] [2020-10-20 06:17:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:12,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:12,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308297287] [2020-10-20 06:17:12,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:17:12,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:17:12,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874893639] [2020-10-20 06:17:12,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:17:12,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:12,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:17:12,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:12,822 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-10-20 06:17:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:12,909 INFO L93 Difference]: Finished difference Result 27 states and 26 transitions. [2020-10-20 06:17:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:17:12,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-20 06:17:12,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:12,920 INFO L225 Difference]: With dead ends: 27 [2020-10-20 06:17:12,921 INFO L226 Difference]: Without dead ends: 24 [2020-10-20 06:17:12,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:12,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-20 06:17:12,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-20 06:17:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 06:17:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 23 transitions. [2020-10-20 06:17:12,960 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 23 transitions. Word has length 10 [2020-10-20 06:17:12,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:12,960 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 23 transitions. [2020-10-20 06:17:12,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:17:12,961 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 23 transitions. [2020-10-20 06:17:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 06:17:12,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:12,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:12,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:17:12,963 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2020-10-20 06:17:12,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:12,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1728099291, now seen corresponding path program 1 times [2020-10-20 06:17:12,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:12,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933387283] [2020-10-20 06:17:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:13,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:13,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933387283] [2020-10-20 06:17:13,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:17:13,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:17:13,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138169762] [2020-10-20 06:17:13,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:17:13,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:13,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:17:13,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:13,065 INFO L87 Difference]: Start difference. First operand 24 states and 23 transitions. Second operand 4 states. [2020-10-20 06:17:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:13,119 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2020-10-20 06:17:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:17:13,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-20 06:17:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:13,120 INFO L225 Difference]: With dead ends: 23 [2020-10-20 06:17:13,120 INFO L226 Difference]: Without dead ends: 23 [2020-10-20 06:17:13,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:13,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-20 06:17:13,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-20 06:17:13,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-20 06:17:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-10-20 06:17:13,126 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 10 [2020-10-20 06:17:13,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:13,126 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-10-20 06:17:13,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:17:13,127 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-10-20 06:17:13,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 06:17:13,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:13,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:13,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:17:13,128 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2020-10-20 06:17:13,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:13,128 INFO L82 PathProgramCache]: Analyzing trace with hash 688977249, now seen corresponding path program 1 times [2020-10-20 06:17:13,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:13,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901480323] [2020-10-20 06:17:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:17:13,156 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:17:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:17:13,196 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:17:13,234 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:17:13,234 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 06:17:13,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 06:17:13,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:17:13 BoogieIcfgContainer [2020-10-20 06:17:13,275 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:17:13,276 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:17:13,276 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:17:13,276 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:17:13,277 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:17:12" (3/4) ... [2020-10-20 06:17:13,280 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 06:17:13,342 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:17:13,342 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:17:13,345 INFO L168 Benchmark]: Toolchain (without parser) took 1483.41 ms. Allocated memory was 41.9 MB in the beginning and 47.7 MB in the end (delta: 5.8 MB). Free memory was 23.9 MB in the beginning and 14.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 15.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:13,346 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 32.0 MB. Free memory was 10.3 MB in the beginning and 10.3 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. [2020-10-20 06:17:13,347 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.26 ms. Allocated memory is still 41.9 MB. Free memory was 23.0 MB in the beginning and 12.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:13,347 INFO L168 Benchmark]: Boogie Preprocessor took 39.62 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 12.7 MB in the beginning and 23.8 MB in the end (delta: -11.1 MB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:13,348 INFO L168 Benchmark]: RCFGBuilder took 261.82 ms. Allocated memory is still 42.5 MB. Free memory was 23.8 MB in the beginning and 10.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:13,349 INFO L168 Benchmark]: TraceAbstraction took 860.07 ms. Allocated memory was 42.5 MB in the beginning and 47.7 MB in the end (delta: 5.2 MB). Free memory was 9.7 MB in the beginning and 16.2 MB in the end (delta: -6.5 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 06:17:13,351 INFO L168 Benchmark]: Witness Printer took 66.52 ms. Allocated memory is still 47.7 MB. Free memory was 16.2 MB in the beginning and 14.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:13,358 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 32.0 MB. Free memory was 10.3 MB in the beginning and 10.3 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 246.26 ms. Allocated memory is still 41.9 MB. Free memory was 23.0 MB in the beginning and 12.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 39.62 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 12.7 MB in the beginning and 23.8 MB in the end (delta: -11.1 MB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 261.82 ms. Allocated memory is still 42.5 MB. Free memory was 23.8 MB in the beginning and 10.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 860.07 ms. Allocated memory was 42.5 MB in the beginning and 47.7 MB in the end (delta: 5.2 MB). Free memory was 9.7 MB in the beginning and 16.2 MB in the end (delta: -6.5 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 66.52 ms. Allocated memory is still 47.7 MB. Free memory was 16.2 MB in the beginning and 14.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L17] CALL, EXPR foo() [L12] int arr[123]; [L13] CALL, EXPR foo2() [L5] int arr[1024]; VAL [arr={5:0}] [L6] arr[194] = 13 VAL [arr={5:0}] [L7] return arr + 1; [L7] return arr + 1; VAL [\result={5:4}] [L13] RET, EXPR foo2() VAL [foo2()={5:4}] [L13] return foo2(); [L17] RET, EXPR foo() VAL [foo()={5:4}] [L17] int *a = foo(); [L18] \read(*a) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 5 SDslu, 33 SDs, 0 SdLazy, 57 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 594 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...