./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 35987657 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/loops/invert_string-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 e33cb4ee211d41e701c41ff91ce60e23f49ca2926f74469a82378a4395cc8259 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:54:49,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:54:49,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:54:50,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:54:50,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:54:50,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:54:50,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:54:50,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:54:50,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:54:50,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:54:50,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:54:50,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:54:50,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:54:50,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:54:50,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:54:50,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:54:50,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:54:50,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:54:50,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:54:50,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:54:50,055 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:54:50,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:54:50,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:54:50,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:54:50,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:54:50,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:54:50,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:54:50,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:54:50,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:54:50,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:54:50,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:54:50,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:54:50,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:54:50,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:54:50,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:54:50,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:54:50,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:54:50,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:54:50,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:54:50,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:54:50,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:54:50,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:54:50,079 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:54:50,104 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:54:50,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:54:50,105 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:54:50,105 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:54:50,105 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:54:50,106 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:54:50,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:54:50,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:54:50,106 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:54:50,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:54:50,113 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:54:50,113 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:54:50,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:54:50,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:54:50,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:54:50,114 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:54:50,114 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:54:50,114 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:54:50,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:54:50,114 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:54:50,114 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:54:50,115 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:54:50,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:54:50,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:54:50,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:54:50,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:54:50,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:54:50,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:54:50,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:54:50,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:54:50,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e33cb4ee211d41e701c41ff91ce60e23f49ca2926f74469a82378a4395cc8259 [2022-07-21 17:54:50,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:54:50,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:54:50,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:54:50,418 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:54:50,420 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:54:50,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/invert_string-2.c [2022-07-21 17:54:50,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33b7403a8/54a334cd80b24873961785e86673825d/FLAG7c7c6a6fc [2022-07-21 17:54:50,766 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:54:50,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/invert_string-2.c [2022-07-21 17:54:50,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33b7403a8/54a334cd80b24873961785e86673825d/FLAG7c7c6a6fc [2022-07-21 17:54:51,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33b7403a8/54a334cd80b24873961785e86673825d [2022-07-21 17:54:51,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:54:51,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:54:51,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:54:51,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:54:51,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:54:51,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:54:51" (1/1) ... [2022-07-21 17:54:51,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1849f0ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:51, skipping insertion in model container [2022-07-21 17:54:51,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:54:51" (1/1) ... [2022-07-21 17:54:51,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:54:51,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:54:51,353 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/invert_string-2.c[327,340] [2022-07-21 17:54:51,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:54:51,383 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:54:51,391 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/invert_string-2.c[327,340] [2022-07-21 17:54:51,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:54:51,428 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:54:51,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:51 WrapperNode [2022-07-21 17:54:51,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:54:51,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:54:51,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:54:51,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:54:51,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:51" (1/1) ... [2022-07-21 17:54:51,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:51" (1/1) ... [2022-07-21 17:54:51,472 INFO L137 Inliner]: procedures = 15, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2022-07-21 17:54:51,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:54:51,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:54:51,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:54:51,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:54:51,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:51" (1/1) ... [2022-07-21 17:54:51,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:51" (1/1) ... [2022-07-21 17:54:51,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:51" (1/1) ... [2022-07-21 17:54:51,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:51" (1/1) ... [2022-07-21 17:54:51,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:51" (1/1) ... [2022-07-21 17:54:51,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:51" (1/1) ... [2022-07-21 17:54:51,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:51" (1/1) ... [2022-07-21 17:54:51,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:54:51,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:54:51,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:54:51,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:54:51,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:51" (1/1) ... [2022-07-21 17:54:51,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:54:51,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:54:51,532 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 17:54:51,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 17:54:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:54:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 17:54:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 17:54:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 17:54:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:54:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:54:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 17:54:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:54:51,628 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:54:51,629 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:54:51,791 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:54:51,800 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:54:51,804 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 17:54:51,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:54:51 BoogieIcfgContainer [2022-07-21 17:54:51,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:54:51,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:54:51,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:54:51,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:54:51,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:54:51" (1/3) ... [2022-07-21 17:54:51,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e96fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:54:51, skipping insertion in model container [2022-07-21 17:54:51,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:51" (2/3) ... [2022-07-21 17:54:51,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e96fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:54:51, skipping insertion in model container [2022-07-21 17:54:51,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:54:51" (3/3) ... [2022-07-21 17:54:51,822 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-2.c [2022-07-21 17:54:51,832 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:54:51,832 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-07-21 17:54:51,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:54:51,883 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7ba3b838, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@35b97eb5 [2022-07-21 17:54:51,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-07-21 17:54:51,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.84) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:51,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-21 17:54:51,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:54:51,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-21 17:54:51,896 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-21 17:54:51,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:54:51,902 INFO L85 PathProgramCache]: Analyzing trace with hash 926022, now seen corresponding path program 1 times [2022-07-21 17:54:51,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:54:51,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775719579] [2022-07-21 17:54:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:54:51,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:54:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:54:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:54:52,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:54:52,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775719579] [2022-07-21 17:54:52,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775719579] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:54:52,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:54:52,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:54:52,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072788837] [2022-07-21 17:54:52,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:54:52,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 17:54:52,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:54:52,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 17:54:52,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 17:54:52,068 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.84) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:54:52,078 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-07-21 17:54:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 17:54:52,080 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-21 17:54:52,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:54:52,085 INFO L225 Difference]: With dead ends: 40 [2022-07-21 17:54:52,086 INFO L226 Difference]: Without dead ends: 38 [2022-07-21 17:54:52,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 17:54:52,091 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:54:52,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:54:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-21 17:54:52,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-21 17:54:52,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-07-21 17:54:52,133 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 4 [2022-07-21 17:54:52,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:54:52,134 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-07-21 17:54:52,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:52,135 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-07-21 17:54:52,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-21 17:54:52,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:54:52,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-21 17:54:52,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:54:52,136 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-21 17:54:52,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:54:52,137 INFO L85 PathProgramCache]: Analyzing trace with hash 925712, now seen corresponding path program 1 times [2022-07-21 17:54:52,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:54:52,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181738231] [2022-07-21 17:54:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:54:52,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:54:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:54:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:54:52,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:54:52,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181738231] [2022-07-21 17:54:52,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181738231] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:54:52,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:54:52,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:54:52,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689685630] [2022-07-21 17:54:52,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:54:52,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:54:52,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:54:52,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:54:52,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:54:52,246 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:54:52,287 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-07-21 17:54:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:54:52,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-21 17:54:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:54:52,289 INFO L225 Difference]: With dead ends: 34 [2022-07-21 17:54:52,289 INFO L226 Difference]: Without dead ends: 34 [2022-07-21 17:54:52,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:54:52,291 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:54:52,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 23 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:54:52,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-21 17:54:52,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-07-21 17:54:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.5) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:52,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-07-21 17:54:52,298 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 4 [2022-07-21 17:54:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:54:52,298 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-07-21 17:54:52,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:52,299 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-07-21 17:54:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-21 17:54:52,300 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:54:52,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-21 17:54:52,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 17:54:52,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-21 17:54:52,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:54:52,302 INFO L85 PathProgramCache]: Analyzing trace with hash 925713, now seen corresponding path program 1 times [2022-07-21 17:54:52,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:54:52,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900406169] [2022-07-21 17:54:52,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:54:52,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:54:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 17:54:52,327 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 17:54:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 17:54:52,357 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 17:54:52,358 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 17:54:52,358 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 14 remaining) [2022-07-21 17:54:52,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2022-07-21 17:54:52,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2022-07-21 17:54:52,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2022-07-21 17:54:52,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2022-07-21 17:54:52,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2022-07-21 17:54:52,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2022-07-21 17:54:52,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2022-07-21 17:54:52,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2022-07-21 17:54:52,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2022-07-21 17:54:52,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2022-07-21 17:54:52,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2022-07-21 17:54:52,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (1 of 14 remaining) [2022-07-21 17:54:52,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2022-07-21 17:54:52,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 17:54:52,374 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 17:54:52,381 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 17:54:52,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 05:54:52 BoogieIcfgContainer [2022-07-21 17:54:52,393 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 17:54:52,393 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 17:54:52,393 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 17:54:52,393 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 17:54:52,394 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:54:51" (3/4) ... [2022-07-21 17:54:52,395 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-21 17:54:52,427 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 17:54:52,427 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 17:54:52,428 INFO L158 Benchmark]: Toolchain (without parser) took 1218.13ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 35.1MB in the beginning and 36.2MB in the end (delta: -1.1MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. [2022-07-21 17:54:52,428 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 56.6MB. Free memory was 38.0MB in the beginning and 37.9MB in the end (delta: 47.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:54:52,429 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.18ms. Allocated memory is still 56.6MB. Free memory was 34.9MB in the beginning and 40.3MB in the end (delta: -5.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 17:54:52,429 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.13ms. Allocated memory is still 56.6MB. Free memory was 40.3MB in the beginning and 38.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:54:52,429 INFO L158 Benchmark]: Boogie Preprocessor took 34.40ms. Allocated memory is still 56.6MB. Free memory was 38.8MB in the beginning and 37.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:54:52,429 INFO L158 Benchmark]: RCFGBuilder took 307.69ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 37.4MB in the beginning and 51.7MB in the end (delta: -14.3MB). Peak memory consumption was 16.0MB. Max. memory is 16.1GB. [2022-07-21 17:54:52,430 INFO L158 Benchmark]: TraceAbstraction took 574.82ms. Allocated memory is still 69.2MB. Free memory was 51.2MB in the beginning and 37.9MB in the end (delta: 13.3MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. [2022-07-21 17:54:52,430 INFO L158 Benchmark]: Witness Printer took 34.48ms. Allocated memory is still 69.2MB. Free memory was 37.9MB in the beginning and 36.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 17:54:52,433 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 56.6MB. Free memory was 38.0MB in the beginning and 37.9MB in the end (delta: 47.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 216.18ms. Allocated memory is still 56.6MB. Free memory was 34.9MB in the beginning and 40.3MB in the end (delta: -5.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.13ms. Allocated memory is still 56.6MB. Free memory was 40.3MB in the beginning and 38.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.40ms. Allocated memory is still 56.6MB. Free memory was 38.8MB in the beginning and 37.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 307.69ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 37.4MB in the beginning and 51.7MB in the end (delta: -14.3MB). Peak memory consumption was 16.0MB. Max. memory is 16.1GB. * TraceAbstraction took 574.82ms. Allocated memory is still 69.2MB. Free memory was 51.2MB in the beginning and 37.9MB in the end (delta: 13.3MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. * Witness Printer took 34.48ms. Allocated memory is still 69.2MB. Free memory was 37.9MB in the beginning and 36.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: -1]: 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 VAL [cont=0, i=0, MAX=-1, str1={5:0}, str2={4:0}] [L20] COND FALSE !(i