./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 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loops/invert_string-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G --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 0.2.1-dev-7e70bad [2021-11-23 13:07:25,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:07:25,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:07:25,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:07:25,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:07:25,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:07:25,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:07:25,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:07:25,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:07:25,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:07:25,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:07:25,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:07:25,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:07:25,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:07:25,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:07:25,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:07:25,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:07:25,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:07:25,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:07:25,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:07:25,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:07:25,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:07:25,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:07:25,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:07:25,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:07:25,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:07:25,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:07:25,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:07:25,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:07:25,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:07:25,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:07:25,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:07:25,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:07:25,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:07:25,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:07:25,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:07:25,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:07:25,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:07:25,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:07:25,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:07:25,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:07:25,419 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 13:07:25,473 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:07:25,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:07:25,474 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:07:25,475 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:07:25,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:07:25,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:07:25,484 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:07:25,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:07:25,484 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:07:25,485 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 13:07:25,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:07:25,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:07:25,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:07:25,487 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 13:07:25,487 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 13:07:25,488 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 13:07:25,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:07:25,488 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 13:07:25,488 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:07:25,489 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:07:25,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:07:25,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:07:25,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:07:25,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:07:25,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:07:25,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:07:25,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:07:25,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:07:25,491 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:07:25,494 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e33cb4ee211d41e701c41ff91ce60e23f49ca2926f74469a82378a4395cc8259 [2021-11-23 13:07:25,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:07:25,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:07:25,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:07:25,889 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:07:25,890 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:07:25,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/loops/invert_string-2.c [2021-11-23 13:07:25,974 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G/data/564a4daee/8a302822b3234dc294803ef52c1775de/FLAG2f888666d [2021-11-23 13:07:26,536 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:07:26,537 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/sv-benchmarks/c/loops/invert_string-2.c [2021-11-23 13:07:26,550 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G/data/564a4daee/8a302822b3234dc294803ef52c1775de/FLAG2f888666d [2021-11-23 13:07:26,865 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G/data/564a4daee/8a302822b3234dc294803ef52c1775de [2021-11-23 13:07:26,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:07:26,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:07:26,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:07:26,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:07:26,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:07:26,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:07:26" (1/1) ... [2021-11-23 13:07:26,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4015dba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:07:26, skipping insertion in model container [2021-11-23 13:07:26,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:07:26" (1/1) ... [2021-11-23 13:07:26,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:07:26,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:07:27,096 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/sv-benchmarks/c/loops/invert_string-2.c[327,340] [2021-11-23 13:07:27,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:07:27,138 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:07:27,164 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/sv-benchmarks/c/loops/invert_string-2.c[327,340] [2021-11-23 13:07:27,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:07:27,200 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:07:27,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:07:27 WrapperNode [2021-11-23 13:07:27,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:07:27,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:07:27,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:07:27,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:07:27,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:07:27" (1/1) ... [2021-11-23 13:07:27,226 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:07:27" (1/1) ... [2021-11-23 13:07:27,258 INFO L137 Inliner]: procedures = 15, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2021-11-23 13:07:27,259 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:07:27,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:07:27,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:07:27,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:07:27,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:07:27" (1/1) ... [2021-11-23 13:07:27,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:07:27" (1/1) ... [2021-11-23 13:07:27,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:07:27" (1/1) ... [2021-11-23 13:07:27,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:07:27" (1/1) ... [2021-11-23 13:07:27,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:07:27" (1/1) ... [2021-11-23 13:07:27,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:07:27" (1/1) ... [2021-11-23 13:07:27,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:07:27" (1/1) ... [2021-11-23 13:07:27,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:07:27,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:07:27,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:07:27,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:07:27,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:07:27" (1/1) ... [2021-11-23 13:07:27,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:07:27,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:07:27,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:07:27,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:07:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:07:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:07:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:07:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:07:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:07:27,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:07:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:07:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:07:27,542 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:07:27,544 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:07:27,875 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:07:27,884 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:07:27,884 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 13:07:27,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:07:27 BoogieIcfgContainer [2021-11-23 13:07:27,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:07:27,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:07:27,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:07:27,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:07:27,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:07:26" (1/3) ... [2021-11-23 13:07:27,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748e0339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:07:27, skipping insertion in model container [2021-11-23 13:07:27,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:07:27" (2/3) ... [2021-11-23 13:07:27,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748e0339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:07:27, skipping insertion in model container [2021-11-23 13:07:27,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:07:27" (3/3) ... [2021-11-23 13:07:27,921 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-2.c [2021-11-23 13:07:27,927 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:07:27,928 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-11-23 13:07:27,988 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:07:27,998 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 13:07:27,998 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-11-23 13:07:28,015 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) [2021-11-23 13:07:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 13:07:28,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:07:28,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 13:07:28,025 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 13:07:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:07:28,050 INFO L85 PathProgramCache]: Analyzing trace with hash 926022, now seen corresponding path program 1 times [2021-11-23 13:07:28,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:07:28,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135998611] [2021-11-23 13:07:28,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:07:28,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:07:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:07:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:07:28,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:07:28,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135998611] [2021-11-23 13:07:28,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135998611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:07:28,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:07:28,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:07:28,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753427998] [2021-11-23 13:07:28,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:07:28,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:07:28,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:07:28,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:07:28,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:07:28,317 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) [2021-11-23 13:07:28,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:07:28,334 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-11-23 13:07:28,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:07:28,337 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 [2021-11-23 13:07:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:07:28,346 INFO L225 Difference]: With dead ends: 40 [2021-11-23 13:07:28,346 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 13:07:28,348 INFO L932 BasicCegarLoop]: 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 [2021-11-23 13:07:28,354 INFO L933 BasicCegarLoop]: 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 [2021-11-23 13:07:28,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:07:28,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 13:07:28,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-23 13:07:28,392 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) [2021-11-23 13:07:28,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-11-23 13:07:28,395 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 4 [2021-11-23 13:07:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:07:28,396 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-11-23 13:07:28,396 INFO L471 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) [2021-11-23 13:07:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-11-23 13:07:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 13:07:28,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:07:28,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 13:07:28,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:07:28,398 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 13:07:28,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:07:28,399 INFO L85 PathProgramCache]: Analyzing trace with hash 925712, now seen corresponding path program 1 times [2021-11-23 13:07:28,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:07:28,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672628307] [2021-11-23 13:07:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:07:28,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:07:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:07:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:07:28,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:07:28,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672628307] [2021-11-23 13:07:28,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672628307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:07:28,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:07:28,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:07:28,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118448653] [2021-11-23 13:07:28,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:07:28,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:07:28,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:07:28,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:07:28,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:07:28,494 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) [2021-11-23 13:07:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:07:28,566 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-11-23 13:07:28,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:07:28,567 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 [2021-11-23 13:07:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:07:28,568 INFO L225 Difference]: With dead ends: 34 [2021-11-23 13:07:28,568 INFO L226 Difference]: Without dead ends: 34 [2021-11-23 13:07:28,569 INFO L932 BasicCegarLoop]: 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 [2021-11-23 13:07:28,571 INFO L933 BasicCegarLoop]: 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:07:28,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 23 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:07:28,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-23 13:07:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-23 13:07:28,578 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) [2021-11-23 13:07:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-11-23 13:07:28,580 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 4 [2021-11-23 13:07:28,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:07:28,580 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-11-23 13:07:28,580 INFO L471 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) [2021-11-23 13:07:28,581 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-11-23 13:07:28,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 13:07:28,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:07:28,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 13:07:28,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:07:28,582 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-11-23 13:07:28,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:07:28,583 INFO L85 PathProgramCache]: Analyzing trace with hash 925713, now seen corresponding path program 1 times [2021-11-23 13:07:28,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:07:28,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901861697] [2021-11-23 13:07:28,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:07:28,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:07:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 13:07:28,619 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 13:07:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 13:07:28,678 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 13:07:28,678 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 13:07:28,680 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (13 of 14 remaining) [2021-11-23 13:07:28,682 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (12 of 14 remaining) [2021-11-23 13:07:28,683 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (11 of 14 remaining) [2021-11-23 13:07:28,683 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (10 of 14 remaining) [2021-11-23 13:07:28,684 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (9 of 14 remaining) [2021-11-23 13:07:28,684 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (8 of 14 remaining) [2021-11-23 13:07:28,684 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (7 of 14 remaining) [2021-11-23 13:07:28,685 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (6 of 14 remaining) [2021-11-23 13:07:28,685 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (5 of 14 remaining) [2021-11-23 13:07:28,685 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (4 of 14 remaining) [2021-11-23 13:07:28,686 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (3 of 14 remaining) [2021-11-23 13:07:28,686 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (2 of 14 remaining) [2021-11-23 13:07:28,687 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (1 of 14 remaining) [2021-11-23 13:07:28,687 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2021-11-23 13:07:28,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:07:28,692 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-23 13:07:28,697 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 13:07:28,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:07:28 BoogieIcfgContainer [2021-11-23 13:07:28,720 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 13:07:28,721 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 13:07:28,721 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 13:07:28,722 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 13:07:28,722 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:07:27" (3/4) ... [2021-11-23 13:07:28,725 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 13:07:28,762 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbee61dd-a671-4cdf-9f69-6f1df73af8db/bin/uautomizer-wIGwrQj20G/witness.graphml [2021-11-23 13:07:28,762 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 13:07:28,763 INFO L158 Benchmark]: Toolchain (without parser) took 1893.14ms. Allocated memory is still 113.2MB. Free memory was 73.6MB in the beginning and 40.1MB in the end (delta: 33.5MB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. [2021-11-23 13:07:28,764 INFO L158 Benchmark]: CDTParser took 0.44ms. Allocated memory is still 113.2MB. Free memory was 89.9MB in the beginning and 89.8MB in the end (delta: 88.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:07:28,765 INFO L158 Benchmark]: CACSL2BoogieTranslator took 331.62ms. Allocated memory is still 113.2MB. Free memory was 73.4MB in the beginning and 87.3MB in the end (delta: -13.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 13:07:28,765 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.48ms. Allocated memory is still 113.2MB. Free memory was 87.3MB in the beginning and 85.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:07:28,766 INFO L158 Benchmark]: Boogie Preprocessor took 63.55ms. Allocated memory is still 113.2MB. Free memory was 85.7MB in the beginning and 84.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:07:28,767 INFO L158 Benchmark]: RCFGBuilder took 562.37ms. Allocated memory is still 113.2MB. Free memory was 84.4MB in the beginning and 72.7MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 13:07:28,767 INFO L158 Benchmark]: TraceAbstraction took 831.88ms. Allocated memory is still 113.2MB. Free memory was 72.3MB in the beginning and 41.8MB in the end (delta: 30.5MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2021-11-23 13:07:28,768 INFO L158 Benchmark]: Witness Printer took 41.21ms. Allocated memory is still 113.2MB. Free memory was 41.6MB in the beginning and 40.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:07:28,772 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44ms. Allocated memory is still 113.2MB. Free memory was 89.9MB in the beginning and 89.8MB in the end (delta: 88.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 331.62ms. Allocated memory is still 113.2MB. Free memory was 73.4MB in the beginning and 87.3MB in the end (delta: -13.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.48ms. Allocated memory is still 113.2MB. Free memory was 87.3MB in the beginning and 85.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 63.55ms. Allocated memory is still 113.2MB. Free memory was 85.7MB in the beginning and 84.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 562.37ms. Allocated memory is still 113.2MB. Free memory was 84.4MB in the beginning and 72.7MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 831.88ms. Allocated memory is still 113.2MB. Free memory was 72.3MB in the beginning and 41.8MB in the end (delta: 30.5MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Witness Printer took 41.21ms. Allocated memory is still 113.2MB. Free memory was 41.6MB in the beginning and 40.1MB in the end (delta: 1.5MB). 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: 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 VAL [cont=0, i=0, MAX=-1, str1={5:0}, str2={4:0}] [L20] COND FALSE !(i