./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/loops/invert_string-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loops/invert_string-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 87b189dc1f4e4e7b15d899fcbb97cc91a55d1376 ................................................................................................................................................................................................................................................................................................................................. 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-a4ecdab [2020-11-28 07:29:34,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:29:34,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:29:34,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:29:34,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:29:34,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:29:34,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:29:34,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:29:34,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:29:34,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:29:34,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:29:34,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:29:34,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:29:34,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:29:34,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:29:34,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:29:34,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:29:34,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:29:34,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:29:34,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:29:34,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:29:34,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:29:34,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:29:34,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:29:34,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:29:34,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:29:34,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:29:34,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:29:34,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:29:34,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:29:34,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:29:34,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:29:34,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:29:34,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:29:34,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:29:34,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:29:34,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:29:34,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:29:34,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:29:34,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:29:34,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:29:34,651 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:29:34,697 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:29:34,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:29:34,698 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:29:34,698 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:29:34,698 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:29:34,699 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:29:34,699 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:29:34,699 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:29:34,699 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:29:34,700 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:29:34,700 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:29:34,700 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:29:34,700 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:29:34,701 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:29:34,701 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:29:34,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:29:34,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:29:34,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:29:34,702 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:29:34,703 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:29:34,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:29:34,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:29:34,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:29:34,704 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:29:34,704 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:29:34,704 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:29:34,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:29:34,705 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:29:34,705 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:29:34,705 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:29:34,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:29:34,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:29:34,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:29:34,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:29:34,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:29:34,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:29:34,707 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:29:34,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:29:34,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:29:34,707 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:29:34,708 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87b189dc1f4e4e7b15d899fcbb97cc91a55d1376 [2020-11-28 07:29:34,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:29:35,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:29:35,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:29:35,025 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:29:35,026 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:29:35,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/bin/utaipan/../../sv-benchmarks/c/loops/invert_string-2.c [2020-11-28 07:29:35,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/bin/utaipan/data/9e1d229ac/5e738c5bb46a465c862a08d3244b9774/FLAG6d2118014 [2020-11-28 07:29:35,661 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:29:35,662 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/sv-benchmarks/c/loops/invert_string-2.c [2020-11-28 07:29:35,673 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/bin/utaipan/data/9e1d229ac/5e738c5bb46a465c862a08d3244b9774/FLAG6d2118014 [2020-11-28 07:29:36,031 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/bin/utaipan/data/9e1d229ac/5e738c5bb46a465c862a08d3244b9774 [2020-11-28 07:29:36,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:29:36,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:29:36,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:29:36,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:29:36,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:29:36,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:29:36" (1/1) ... [2020-11-28 07:29:36,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ed2778f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:36, skipping insertion in model container [2020-11-28 07:29:36,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:29:36" (1/1) ... [2020-11-28 07:29:36,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:29:36,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:29:36,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:29:36,354 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:29:36,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:29:36,387 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:29:36,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:36 WrapperNode [2020-11-28 07:29:36,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:29:36,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:29:36,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:29:36,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:29:36,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:36" (1/1) ... [2020-11-28 07:29:36,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:36" (1/1) ... [2020-11-28 07:29:36,434 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:29:36,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:29:36,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:29:36,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:29:36,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:36" (1/1) ... [2020-11-28 07:29:36,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:36" (1/1) ... [2020-11-28 07:29:36,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:36" (1/1) ... [2020-11-28 07:29:36,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:36" (1/1) ... [2020-11-28 07:29:36,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:36" (1/1) ... [2020-11-28 07:29:36,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:36" (1/1) ... [2020-11-28 07:29:36,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:36" (1/1) ... [2020-11-28 07:29:36,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:29:36,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:29:36,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:29:36,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:29:36,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/bin/utaipan/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 [2020-11-28 07:29:36,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:29:36,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:29:36,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:29:36,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:29:36,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:29:36,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:29:36,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:29:37,139 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:29:37,139 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-11-28 07:29:37,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:29:37 BoogieIcfgContainer [2020-11-28 07:29:37,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:29:37,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:29:37,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:29:37,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:29:37,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:29:36" (1/3) ... [2020-11-28 07:29:37,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e7e5732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:29:37, skipping insertion in model container [2020-11-28 07:29:37,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:36" (2/3) ... [2020-11-28 07:29:37,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e7e5732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:29:37, skipping insertion in model container [2020-11-28 07:29:37,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:29:37" (3/3) ... [2020-11-28 07:29:37,150 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-2.c [2020-11-28 07:29:37,161 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:29:37,166 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 14 error locations. [2020-11-28 07:29:37,178 INFO L253 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2020-11-28 07:29:37,199 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:29:37,199 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:29:37,199 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:29:37,199 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:29:37,200 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:29:37,200 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:29:37,200 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:29:37,200 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:29:37,214 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-11-28 07:29:37,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:29:37,220 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:37,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:29:37,221 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]=== [2020-11-28 07:29:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:37,227 INFO L82 PathProgramCache]: Analyzing trace with hash 109876, now seen corresponding path program 1 times [2020-11-28 07:29:37,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:37,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339542141] [2020-11-28 07:29:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:37,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339542141] [2020-11-28 07:29:37,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:37,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:29:37,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008010692] [2020-11-28 07:29:37,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:37,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:37,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:37,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:37,438 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-11-28 07:29:37,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:37,511 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-11-28 07:29:37,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:37,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:29:37,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:37,519 INFO L225 Difference]: With dead ends: 25 [2020-11-28 07:29:37,519 INFO L226 Difference]: Without dead ends: 24 [2020-11-28 07:29:37,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-28 07:29:37,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-28 07:29:37,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 07:29:37,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-28 07:29:37,564 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 3 [2020-11-28 07:29:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:37,564 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-28 07:29:37,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-28 07:29:37,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:29:37,565 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:37,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:29:37,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:29:37,566 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]=== [2020-11-28 07:29:37,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:37,568 INFO L82 PathProgramCache]: Analyzing trace with hash 109877, now seen corresponding path program 1 times [2020-11-28 07:29:37,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:37,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566714102] [2020-11-28 07:29:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:37,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566714102] [2020-11-28 07:29:37,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:37,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:29:37,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212868210] [2020-11-28 07:29:37,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:29:37,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:37,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:29:37,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:29:37,714 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2020-11-28 07:29:37,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:37,837 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-11-28 07:29:37,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:29:37,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-28 07:29:37,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:37,839 INFO L225 Difference]: With dead ends: 28 [2020-11-28 07:29:37,839 INFO L226 Difference]: Without dead ends: 28 [2020-11-28 07:29:37,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:29:37,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-28 07:29:37,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-11-28 07:29:37,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-28 07:29:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-11-28 07:29:37,846 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 3 [2020-11-28 07:29:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:37,847 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-11-28 07:29:37,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:29:37,847 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-11-28 07:29:37,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:29:37,847 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:37,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:29:37,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:29:37,848 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]=== [2020-11-28 07:29:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash 112459, now seen corresponding path program 1 times [2020-11-28 07:29:37,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:37,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744721302] [2020-11-28 07:29:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:29:37,873 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:29:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:29:37,903 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:29:37,931 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:29:37,931 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:29:37,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:29:37,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:29:37 BoogieIcfgContainer [2020-11-28 07:29:37,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:29:37,948 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:29:37,948 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:29:37,948 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:29:37,948 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:29:37" (3/4) ... [2020-11-28 07:29:37,950 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:29:37,978 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c8fcfcd0-0c1d-45e0-b3f0-b1a9798d1076/bin/utaipan/witness.graphml [2020-11-28 07:29:37,979 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:29:37,981 INFO L168 Benchmark]: Toolchain (without parser) took 1944.27 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 54.4 MB in the beginning and 67.0 MB in the end (delta: -12.6 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:37,981 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 90.2 MB. Free memory is still 70.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:29:37,982 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.90 ms. Allocated memory is still 90.2 MB. Free memory was 54.2 MB in the beginning and 67.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:37,983 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.35 ms. Allocated memory is still 90.2 MB. Free memory was 67.7 MB in the beginning and 66.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:37,983 INFO L168 Benchmark]: Boogie Preprocessor took 51.62 ms. Allocated memory is still 90.2 MB. Free memory was 66.3 MB in the beginning and 65.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:29:37,984 INFO L168 Benchmark]: RCFGBuilder took 653.79 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 65.0 MB in the beginning and 79.8 MB in the end (delta: -14.8 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:37,985 INFO L168 Benchmark]: TraceAbstraction took 804.05 ms. Allocated memory is still 109.1 MB. Free memory was 79.0 MB in the beginning and 69.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:37,985 INFO L168 Benchmark]: Witness Printer took 31.13 ms. Allocated memory is still 109.1 MB. Free memory was 68.6 MB in the beginning and 67.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:37,989 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 90.2 MB. Free memory is still 70.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 350.90 ms. Allocated memory is still 90.2 MB. Free memory was 54.2 MB in the beginning and 67.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.35 ms. Allocated memory is still 90.2 MB. Free memory was 67.7 MB in the beginning and 66.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.62 ms. Allocated memory is still 90.2 MB. Free memory was 66.3 MB in the beginning and 65.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 653.79 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 65.0 MB in the beginning and 79.8 MB in the end (delta: -14.8 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 804.05 ms. Allocated memory is still 109.1 MB. Free memory was 79.0 MB in the beginning and 69.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. * Witness Printer took 31.13 ms. Allocated memory is still 109.1 MB. Free memory was 68.6 MB in the beginning and 67.0 MB in the end (delta: 1.6 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: 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