./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 54858612 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_1.5.800.v20200727-1323.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 0.2.0-5485861 [2020-10-26 03:56:15,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 03:56:15,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 03:56:15,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 03:56:15,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 03:56:15,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 03:56:15,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 03:56:15,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 03:56:15,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 03:56:15,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 03:56:15,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 03:56:15,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 03:56:15,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 03:56:15,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 03:56:15,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 03:56:15,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 03:56:15,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 03:56:15,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 03:56:15,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 03:56:15,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 03:56:15,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 03:56:15,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 03:56:15,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 03:56:15,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 03:56:15,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 03:56:15,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 03:56:15,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 03:56:15,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 03:56:15,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 03:56:15,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 03:56:15,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 03:56:15,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 03:56:15,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 03:56:15,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 03:56:15,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 03:56:15,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 03:56:15,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 03:56:15,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 03:56:15,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 03:56:15,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 03:56:15,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 03:56:15,878 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-26 03:56:15,907 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 03:56:15,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 03:56:15,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 03:56:15,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 03:56:15,910 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 03:56:15,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 03:56:15,910 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 03:56:15,910 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-26 03:56:15,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 03:56:15,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 03:56:15,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 03:56:15,911 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-26 03:56:15,912 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-26 03:56:15,912 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-26 03:56:15,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 03:56:15,912 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-26 03:56:15,912 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 03:56:15,913 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 03:56:15,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 03:56:15,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 03:56:15,913 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 03:56:15,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 03:56:15,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 03:56:15,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 03:56:15,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 03:56:15,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 03:56:15,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 03:56:15,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 03:56:15,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25981771a012eec333f97d8302486eae22970d9e [2020-10-26 03:56:16,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 03:56:16,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 03:56:16,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 03:56:16,427 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 03:56:16,428 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 03:56:16,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/scopes4-2.c [2020-10-26 03:56:16,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb2506f42/acdef669eac44c0aa836f9ce7f716364/FLAGc3838fa83 [2020-10-26 03:56:17,169 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 03:56:17,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/scopes4-2.c [2020-10-26 03:56:17,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb2506f42/acdef669eac44c0aa836f9ce7f716364/FLAGc3838fa83 [2020-10-26 03:56:17,512 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb2506f42/acdef669eac44c0aa836f9ce7f716364 [2020-10-26 03:56:17,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 03:56:17,525 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-26 03:56:17,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 03:56:17,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 03:56:17,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 03:56:17,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 03:56:17" (1/1) ... [2020-10-26 03:56:17,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72a64846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:56:17, skipping insertion in model container [2020-10-26 03:56:17,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 03:56:17" (1/1) ... [2020-10-26 03:56:17,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 03:56:17,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 03:56:17,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 03:56:17,741 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 03:56:17,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 03:56:17,814 INFO L208 MainTranslator]: Completed translation [2020-10-26 03:56:17,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:56:17 WrapperNode [2020-10-26 03:56:17,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 03:56:17,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 03:56:17,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 03:56:17,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 03:56:17,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:56:17" (1/1) ... [2020-10-26 03:56:17,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:56:17" (1/1) ... [2020-10-26 03:56:17,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:56:17" (1/1) ... [2020-10-26 03:56:17,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:56:17" (1/1) ... [2020-10-26 03:56:17,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:56:17" (1/1) ... [2020-10-26 03:56:17,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:56:17" (1/1) ... [2020-10-26 03:56:17,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:56:17" (1/1) ... [2020-10-26 03:56:17,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 03:56:17,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 03:56:17,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 03:56:17,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 03:56:17,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:56:17" (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 [2020-10-26 03:56:17,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 03:56:17,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 03:56:17,943 INFO L138 BoogieDeclarations]: Found implementation of procedure foo2 [2020-10-26 03:56:17,944 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-26 03:56:17,944 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 03:56:17,944 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-10-26 03:56:17,944 INFO L130 BoogieDeclarations]: Found specification of procedure foo2 [2020-10-26 03:56:17,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 03:56:17,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 03:56:17,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 03:56:17,945 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-26 03:56:17,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 03:56:17,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 03:56:17,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 03:56:17,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 03:56:17,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 03:56:18,207 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 03:56:18,208 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-26 03:56:18,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:56:18 BoogieIcfgContainer [2020-10-26 03:56:18,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 03:56:18,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 03:56:18,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 03:56:18,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 03:56:18,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 03:56:17" (1/3) ... [2020-10-26 03:56:18,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f369e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 03:56:18, skipping insertion in model container [2020-10-26 03:56:18,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:56:17" (2/3) ... [2020-10-26 03:56:18,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f369e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 03:56:18, skipping insertion in model container [2020-10-26 03:56:18,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:56:18" (3/3) ... [2020-10-26 03:56:18,223 INFO L111 eAbstractionObserver]: Analyzing ICFG scopes4-2.c [2020-10-26 03:56:18,239 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-26 03:56:18,245 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-10-26 03:56:18,277 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-26 03:56:18,333 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 03:56:18,333 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-26 03:56:18,334 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-26 03:56:18,334 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 03:56:18,334 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 03:56:18,334 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 03:56:18,334 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 03:56:18,335 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 03:56:18,359 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-26 03:56:18,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-26 03:56:18,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:18,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:56:18,376 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2020-10-26 03:56:18,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:18,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1728099290, now seen corresponding path program 1 times [2020-10-26 03:56:18,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:18,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020367797] [2020-10-26 03:56:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:18,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:56:18,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020367797] [2020-10-26 03:56:18,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:18,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 03:56:18,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699512762] [2020-10-26 03:56:18,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:18,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:18,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:18,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:18,720 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-10-26 03:56:18,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:18,814 INFO L93 Difference]: Finished difference Result 27 states and 26 transitions. [2020-10-26 03:56:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:18,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-26 03:56:18,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:18,826 INFO L225 Difference]: With dead ends: 27 [2020-10-26 03:56:18,826 INFO L226 Difference]: Without dead ends: 24 [2020-10-26 03:56:18,828 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 [2020-10-26 03:56:18,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-26 03:56:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-26 03:56:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 03:56:18,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 23 transitions. [2020-10-26 03:56:18,873 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 23 transitions. Word has length 10 [2020-10-26 03:56:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:18,873 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 23 transitions. [2020-10-26 03:56:18,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 23 transitions. [2020-10-26 03:56:18,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-26 03:56:18,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:18,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:56:18,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 03:56:18,876 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2020-10-26 03:56:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:18,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1728099291, now seen corresponding path program 1 times [2020-10-26 03:56:18,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:18,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36421328] [2020-10-26 03:56:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:18,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:56:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:56:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:56:19,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36421328] [2020-10-26 03:56:19,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:56:19,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 03:56:19,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405162677] [2020-10-26 03:56:19,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:56:19,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:56:19,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:56:19,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:56:19,017 INFO L87 Difference]: Start difference. First operand 24 states and 23 transitions. Second operand 4 states. [2020-10-26 03:56:19,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:56:19,085 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2020-10-26 03:56:19,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:56:19,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-26 03:56:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:56:19,087 INFO L225 Difference]: With dead ends: 23 [2020-10-26 03:56:19,087 INFO L226 Difference]: Without dead ends: 23 [2020-10-26 03:56:19,088 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 [2020-10-26 03:56:19,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-26 03:56:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-26 03:56:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-26 03:56:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-10-26 03:56:19,093 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 10 [2020-10-26 03:56:19,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:56:19,093 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-10-26 03:56:19,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:56:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-10-26 03:56:19,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 03:56:19,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:56:19,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:56:19,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 03:56:19,095 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2020-10-26 03:56:19,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:56:19,096 INFO L82 PathProgramCache]: Analyzing trace with hash 688977249, now seen corresponding path program 1 times [2020-10-26 03:56:19,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:56:19,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998359629] [2020-10-26 03:56:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:56:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 03:56:19,133 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 03:56:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 03:56:19,163 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 03:56:19,189 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 03:56:19,189 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-26 03:56:19,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 03:56:19,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 03:56:19 BoogieIcfgContainer [2020-10-26 03:56:19,223 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 03:56:19,224 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 03:56:19,224 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 03:56:19,225 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 03:56:19,225 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:56:18" (3/4) ... [2020-10-26 03:56:19,228 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-26 03:56:19,269 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-26 03:56:19,270 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 03:56:19,273 INFO L168 Benchmark]: Toolchain (without parser) took 1754.37 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 29.9 MB in the beginning and 34.3 MB in the end (delta: -4.5 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2020-10-26 03:56:19,274 INFO L168 Benchmark]: CDTParser took 0.93 ms. Allocated memory is still 46.1 MB. Free memory was 31.8 MB in the beginning and 31.8 MB in the end (delta: 33.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 03:56:19,274 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.57 ms. Allocated memory is still 46.1 MB. Free memory was 29.2 MB in the beginning and 30.1 MB in the end (delta: -858.1 kB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2020-10-26 03:56:19,275 INFO L168 Benchmark]: Boogie Preprocessor took 40.18 ms. Allocated memory is still 46.1 MB. Free memory was 30.1 MB in the beginning and 28.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 03:56:19,276 INFO L168 Benchmark]: RCFGBuilder took 353.08 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 28.7 MB in the beginning and 38.4 MB in the end (delta: -9.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2020-10-26 03:56:19,277 INFO L168 Benchmark]: TraceAbstraction took 1010.45 ms. Allocated memory is still 56.6 MB. Free memory was 37.9 MB in the beginning and 36.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. [2020-10-26 03:56:19,278 INFO L168 Benchmark]: Witness Printer took 45.79 ms. Allocated memory is still 56.6 MB. Free memory was 35.8 MB in the beginning and 34.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 03:56:19,282 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.93 ms. Allocated memory is still 46.1 MB. Free memory was 31.8 MB in the beginning and 31.8 MB in the end (delta: 33.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.57 ms. Allocated memory is still 46.1 MB. Free memory was 29.2 MB in the beginning and 30.1 MB in the end (delta: -858.1 kB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.18 ms. Allocated memory is still 46.1 MB. Free memory was 30.1 MB in the beginning and 28.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 353.08 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 28.7 MB in the beginning and 38.4 MB in the end (delta: -9.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1010.45 ms. Allocated memory is still 56.6 MB. Free memory was 37.9 MB in the beginning and 36.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. * Witness Printer took 45.79 ms. Allocated memory is still 56.6 MB. Free memory was 35.8 MB in the beginning and 34.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 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: 0.8s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, 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, 0.1s 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...