./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loops/invert_string-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/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 0.2.0-7b2dab5 [2020-12-09 19:27:47,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:27:47,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:27:47,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:27:47,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:27:47,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:27:47,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:27:47,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:27:47,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:27:47,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:27:47,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:27:47,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:27:47,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:27:47,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:27:47,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:27:47,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:27:47,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:27:47,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:27:47,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:27:47,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:27:47,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:27:47,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:27:47,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:27:47,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:27:47,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:27:47,234 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:27:47,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:27:47,235 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:27:47,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:27:47,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:27:47,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:27:47,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:27:47,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:27:47,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:27:47,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:27:47,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:27:47,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:27:47,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:27:47,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:27:47,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:27:47,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:27:47,243 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 19:27:47,264 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:27:47,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:27:47,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:27:47,266 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:27:47,266 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:27:47,266 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:27:47,266 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 19:27:47,266 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:27:47,266 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:27:47,266 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 19:27:47,266 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 19:27:47,267 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:27:47,267 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 19:27:47,267 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 19:27:47,267 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 19:27:47,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 19:27:47,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 19:27:47,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:27:47,268 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 19:27:47,268 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 19:27:47,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 19:27:47,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 19:27:47,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:27:47,268 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 19:27:47,269 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 19:27:47,269 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 19:27:47,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:27:47,269 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 19:27:47,269 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 19:27:47,269 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:27:47,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:27:47,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:27:47,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:27:47,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:27:47,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:27:47,270 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 19:27:47,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 19:27:47,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:27:47,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:27:47,271 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_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87b189dc1f4e4e7b15d899fcbb97cc91a55d1376 [2020-12-09 19:27:47,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:27:47,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:27:47,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:27:47,491 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:27:47,491 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:27:47,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/bin/utaipan/../../sv-benchmarks/c/loops/invert_string-2.c [2020-12-09 19:27:47,533 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/bin/utaipan/data/e598b0ca5/57832bdea99041dfa8abb55ca89cf292/FLAG6fc409169 [2020-12-09 19:27:47,915 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:27:47,915 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/sv-benchmarks/c/loops/invert_string-2.c [2020-12-09 19:27:47,920 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/bin/utaipan/data/e598b0ca5/57832bdea99041dfa8abb55ca89cf292/FLAG6fc409169 [2020-12-09 19:27:47,929 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/bin/utaipan/data/e598b0ca5/57832bdea99041dfa8abb55ca89cf292 [2020-12-09 19:27:47,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:27:47,932 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:27:47,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:27:47,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:27:47,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:27:47,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:27:47" (1/1) ... [2020-12-09 19:27:47,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8ad2ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:47, skipping insertion in model container [2020-12-09 19:27:47,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:27:47" (1/1) ... [2020-12-09 19:27:47,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:27:47,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:27:48,069 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/sv-benchmarks/c/loops/invert_string-2.c[327,340] [2020-12-09 19:27:48,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:27:48,088 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:27:48,097 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/sv-benchmarks/c/loops/invert_string-2.c[327,340] [2020-12-09 19:27:48,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:27:48,113 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:27:48,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:48 WrapperNode [2020-12-09 19:27:48,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:27:48,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:27:48,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:27:48,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:27:48,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:48" (1/1) ... [2020-12-09 19:27:48,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:48" (1/1) ... [2020-12-09 19:27:48,139 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:27:48,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:27:48,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:27:48,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:27:48,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:48" (1/1) ... [2020-12-09 19:27:48,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:48" (1/1) ... [2020-12-09 19:27:48,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:48" (1/1) ... [2020-12-09 19:27:48,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:48" (1/1) ... [2020-12-09 19:27:48,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:48" (1/1) ... [2020-12-09 19:27:48,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:48" (1/1) ... [2020-12-09 19:27:48,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:48" (1/1) ... [2020-12-09 19:27:48,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:27:48,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:27:48,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:27:48,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:27:48,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/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 [2020-12-09 19:27:48,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 19:27:48,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 19:27:48,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 19:27:48,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:27:48,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:27:48,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 19:27:48,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 19:27:48,507 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:27:48,507 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 19:27:48,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:27:48 BoogieIcfgContainer [2020-12-09 19:27:48,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:27:48,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:27:48,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:27:48,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:27:48,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:27:47" (1/3) ... [2020-12-09 19:27:48,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66946306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:27:48, skipping insertion in model container [2020-12-09 19:27:48,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:27:48" (2/3) ... [2020-12-09 19:27:48,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66946306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:27:48, skipping insertion in model container [2020-12-09 19:27:48,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:27:48" (3/3) ... [2020-12-09 19:27:48,514 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-2.c [2020-12-09 19:27:48,525 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:27:48,528 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 14 error locations. [2020-12-09 19:27:48,535 INFO L253 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2020-12-09 19:27:48,549 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:27:48,549 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 19:27:48,549 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:27:48,549 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:27:48,550 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:27:48,550 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:27:48,550 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:27:48,550 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:27:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-12-09 19:27:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 19:27:48,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:27:48,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 19:27:48,564 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 19:27:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:27:48,568 INFO L82 PathProgramCache]: Analyzing trace with hash 107954, now seen corresponding path program 1 times [2020-12-09 19:27:48,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:27:48,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003067215] [2020-12-09 19:27:48,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:27:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:27:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:27:48,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003067215] [2020-12-09 19:27:48,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:27:48,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 19:27:48,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620823768] [2020-12-09 19:27:48,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:27:48,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:27:48,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:27:48,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:27:48,718 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-12-09 19:27:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:27:48,757 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-12-09 19:27:48,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:27:48,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 19:27:48,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:27:48,764 INFO L225 Difference]: With dead ends: 25 [2020-12-09 19:27:48,764 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 19:27:48,765 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 [2020-12-09 19:27:48,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 19:27:48,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-09 19:27:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 19:27:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-09 19:27:48,787 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 3 [2020-12-09 19:27:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:27:48,787 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-09 19:27:48,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:27:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-09 19:27:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 19:27:48,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:27:48,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 19:27:48,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 19:27:48,788 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 19:27:48,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:27:48,788 INFO L82 PathProgramCache]: Analyzing trace with hash 107955, now seen corresponding path program 1 times [2020-12-09 19:27:48,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:27:48,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409290646] [2020-12-09 19:27:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:27:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:27:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:27:48,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409290646] [2020-12-09 19:27:48,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:27:48,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:27:48,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158284446] [2020-12-09 19:27:48,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 19:27:48,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:27:48,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 19:27:48,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:27:48,847 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2020-12-09 19:27:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:27:48,898 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-12-09 19:27:48,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 19:27:48,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-12-09 19:27:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:27:48,899 INFO L225 Difference]: With dead ends: 28 [2020-12-09 19:27:48,899 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 19:27:48,900 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 [2020-12-09 19:27:48,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 19:27:48,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-12-09 19:27:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 19:27:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-09 19:27:48,903 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 3 [2020-12-09 19:27:48,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:27:48,904 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-09 19:27:48,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 19:27:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-09 19:27:48,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 19:27:48,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:27:48,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 19:27:48,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 19:27:48,904 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 19:27:48,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:27:48,905 INFO L82 PathProgramCache]: Analyzing trace with hash 110444, now seen corresponding path program 1 times [2020-12-09 19:27:48,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:27:48,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827542354] [2020-12-09 19:27:48,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:27:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:27:48,925 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:27:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:27:48,942 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:27:48,956 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 19:27:48,956 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 19:27:48,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 19:27:48,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:27:48 BoogieIcfgContainer [2020-12-09 19:27:48,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:27:48,969 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:27:48,969 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:27:48,969 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:27:48,970 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:27:48" (3/4) ... [2020-12-09 19:27:48,971 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 19:27:48,993 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ff0fd89a-5fd8-4930-a831-4d7fa39d841e/bin/utaipan/witness.graphml [2020-12-09 19:27:48,993 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:27:48,995 INFO L168 Benchmark]: Toolchain (without parser) took 1061.93 ms. Allocated memory is still 94.4 MB. Free memory was 65.7 MB in the beginning and 47.0 MB in the end (delta: 18.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. [2020-12-09 19:27:48,995 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 71.3 MB. Free memory is still 50.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:27:48,995 INFO L168 Benchmark]: CACSL2BoogieTranslator took 180.23 ms. Allocated memory is still 94.4 MB. Free memory was 65.5 MB in the beginning and 55.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 19:27:48,996 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.07 ms. Allocated memory is still 94.4 MB. Free memory was 55.7 MB in the beginning and 54.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:27:48,996 INFO L168 Benchmark]: Boogie Preprocessor took 18.05 ms. Allocated memory is still 94.4 MB. Free memory was 54.2 MB in the beginning and 53.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:27:48,997 INFO L168 Benchmark]: RCFGBuilder took 351.00 ms. Allocated memory is still 94.4 MB. Free memory was 53.0 MB in the beginning and 55.8 MB in the end (delta: -2.8 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2020-12-09 19:27:48,997 INFO L168 Benchmark]: TraceAbstraction took 458.72 ms. Allocated memory is still 94.4 MB. Free memory was 55.4 MB in the beginning and 48.6 MB in the end (delta: 6.7 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2020-12-09 19:27:48,997 INFO L168 Benchmark]: Witness Printer took 24.29 ms. Allocated memory is still 94.4 MB. Free memory was 48.6 MB in the beginning and 47.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:27:49,000 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 71.3 MB. Free memory is still 50.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 180.23 ms. Allocated memory is still 94.4 MB. Free memory was 65.5 MB in the beginning and 55.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.07 ms. Allocated memory is still 94.4 MB. Free memory was 55.7 MB in the beginning and 54.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.05 ms. Allocated memory is still 94.4 MB. Free memory was 54.2 MB in the beginning and 53.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 351.00 ms. Allocated memory is still 94.4 MB. Free memory was 53.0 MB in the beginning and 55.8 MB in the end (delta: -2.8 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 458.72 ms. Allocated memory is still 94.4 MB. Free memory was 55.4 MB in the beginning and 48.6 MB in the end (delta: 6.7 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * Witness Printer took 24.29 ms. Allocated memory is still 94.4 MB. Free memory was 48.6 MB in the beginning and 47.0 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