./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/loops/invert_string_false-valid-deref.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_cb94d41a-36c2-4a78-8c37-4b3a9e908b8b/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cb94d41a-36c2-4a78-8c37-4b3a9e908b8b/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cb94d41a-36c2-4a78-8c37-4b3a9e908b8b/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cb94d41a-36c2-4a78-8c37-4b3a9e908b8b/bin-2019/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loops/invert_string_false-valid-deref.c -s /tmp/vcloud-vcloud-master/worker/working_dir_cb94d41a-36c2-4a78-8c37-4b3a9e908b8b/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cb94d41a-36c2-4a78-8c37-4b3a9e908b8b/bin-2019/uautomizer --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 01c8dcbf548ac0eef8cebe655947adbb13d26f9a ................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 13:00:24,379 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 13:00:24,380 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 13:00:24,387 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 13:00:24,387 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 13:00:24,388 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 13:00:24,389 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 13:00:24,390 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 13:00:24,391 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 13:00:24,391 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 13:00:24,392 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 13:00:24,392 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 13:00:24,393 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 13:00:24,394 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 13:00:24,394 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 13:00:24,395 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 13:00:24,396 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 13:00:24,397 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 13:00:24,398 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 13:00:24,399 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 13:00:24,400 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 13:00:24,401 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 13:00:24,402 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 13:00:24,403 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 13:00:24,403 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 13:00:24,403 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 13:00:24,404 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 13:00:24,405 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 13:00:24,405 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 13:00:24,406 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 13:00:24,406 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 13:00:24,407 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 13:00:24,407 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 13:00:24,407 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 13:00:24,407 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 13:00:24,408 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 13:00:24,408 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cb94d41a-36c2-4a78-8c37-4b3a9e908b8b/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-11-28 13:00:24,418 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 13:00:24,418 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 13:00:24,419 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 13:00:24,419 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 13:00:24,419 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 13:00:24,419 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 13:00:24,420 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 13:00:24,420 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 13:00:24,420 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 13:00:24,420 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 13:00:24,420 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 13:00:24,420 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 13:00:24,420 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 13:00:24,420 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-28 13:00:24,420 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-28 13:00:24,421 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-28 13:00:24,421 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 13:00:24,421 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 13:00:24,421 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 13:00:24,421 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 13:00:24,421 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 13:00:24,421 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 13:00:24,422 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 13:00:24,422 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:00:24,422 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 13:00:24,422 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 13:00:24,422 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 13:00:24,422 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 13:00:24,422 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_cb94d41a-36c2-4a78-8c37-4b3a9e908b8b/bin-2019/uautomizer 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 -> 01c8dcbf548ac0eef8cebe655947adbb13d26f9a [2018-11-28 13:00:24,445 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 13:00:24,453 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 13:00:24,455 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 13:00:24,456 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 13:00:24,456 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 13:00:24,457 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cb94d41a-36c2-4a78-8c37-4b3a9e908b8b/bin-2019/uautomizer/../../sv-benchmarks/c/loops/invert_string_false-valid-deref.c [2018-11-28 13:00:24,492 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cb94d41a-36c2-4a78-8c37-4b3a9e908b8b/bin-2019/uautomizer/data/26f14603d/af46c290c2934bdaae70f60d378495b5/FLAGdbbc91de7 [2018-11-28 13:00:24,886 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 13:00:24,887 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cb94d41a-36c2-4a78-8c37-4b3a9e908b8b/sv-benchmarks/c/loops/invert_string_false-valid-deref.c [2018-11-28 13:00:24,890 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cb94d41a-36c2-4a78-8c37-4b3a9e908b8b/bin-2019/uautomizer/data/26f14603d/af46c290c2934bdaae70f60d378495b5/FLAGdbbc91de7 [2018-11-28 13:00:24,899 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cb94d41a-36c2-4a78-8c37-4b3a9e908b8b/bin-2019/uautomizer/data/26f14603d/af46c290c2934bdaae70f60d378495b5 [2018-11-28 13:00:24,901 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 13:00:24,902 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-28 13:00:24,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 13:00:24,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 13:00:24,906 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 13:00:24,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:00:24" (1/1) ... [2018-11-28 13:00:24,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23c1b638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:00:24, skipping insertion in model container [2018-11-28 13:00:24,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:00:24" (1/1) ... [2018-11-28 13:00:24,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 13:00:24,927 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 13:00:25,029 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:00:25,031 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 13:00:25,045 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:00:25,059 INFO L195 MainTranslator]: Completed translation [2018-11-28 13:00:25,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:00:25 WrapperNode [2018-11-28 13:00:25,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 13:00:25,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 13:00:25,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 13:00:25,060 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 13:00:25,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:00:25" (1/1) ... [2018-11-28 13:00:25,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:00:25" (1/1) ... [2018-11-28 13:00:25,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:00:25" (1/1) ... [2018-11-28 13:00:25,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:00:25" (1/1) ... [2018-11-28 13:00:25,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:00:25" (1/1) ... [2018-11-28 13:00:25,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:00:25" (1/1) ... [2018-11-28 13:00:25,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:00:25" (1/1) ... [2018-11-28 13:00:25,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 13:00:25,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 13:00:25,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 13:00:25,130 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 13:00:25,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:00:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cb94d41a-36c2-4a78-8c37-4b3a9e908b8b/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:00:25,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 13:00:25,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 13:00:25,167 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-28 13:00:25,167 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 13:00:25,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-28 13:00:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-28 13:00:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-11-28 13:00:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-11-28 13:00:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 13:00:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 13:00:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 13:00:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-28 13:00:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 13:00:25,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 13:00:25,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 13:00:25,406 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 13:00:25,406 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-11-28 13:00:25,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:00:25 BoogieIcfgContainer [2018-11-28 13:00:25,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 13:00:25,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 13:00:25,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 13:00:25,409 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 13:00:25,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 01:00:24" (1/3) ... [2018-11-28 13:00:25,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f02980e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:00:25, skipping insertion in model container [2018-11-28 13:00:25,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:00:25" (2/3) ... [2018-11-28 13:00:25,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f02980e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:00:25, skipping insertion in model container [2018-11-28 13:00:25,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:00:25" (3/3) ... [2018-11-28 13:00:25,413 INFO L112 eAbstractionObserver]: Analyzing ICFG invert_string_false-valid-deref.c [2018-11-28 13:00:25,422 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 13:00:25,429 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2018-11-28 13:00:25,443 INFO L257 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2018-11-28 13:00:25,463 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 13:00:25,464 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 13:00:25,464 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-28 13:00:25,464 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 13:00:25,464 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 13:00:25,464 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 13:00:25,464 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 13:00:25,465 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 13:00:25,465 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 13:00:25,476 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-11-28 13:00:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-28 13:00:25,482 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:00:25,483 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:00:25,484 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION]=== [2018-11-28 13:00:25,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:00:25,488 INFO L82 PathProgramCache]: Analyzing trace with hash -523138443, now seen corresponding path program 1 times [2018-11-28 13:00:25,489 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:00:25,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:00:25,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:00:25,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:00:25,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:00:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:00:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:00:25,576 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:00:25,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 13:00:25,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-28 13:00:25,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-28 13:00:25,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 13:00:25,589 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2018-11-28 13:00:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:00:25,601 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-11-28 13:00:25,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 13:00:25,602 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-11-28 13:00:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:00:25,609 INFO L225 Difference]: With dead ends: 47 [2018-11-28 13:00:25,609 INFO L226 Difference]: Without dead ends: 43 [2018-11-28 13:00:25,610 INFO L631 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 [2018-11-28 13:00:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-28 13:00:25,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-11-28 13:00:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-28 13:00:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-11-28 13:00:25,635 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 8 [2018-11-28 13:00:25,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:00:25,635 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-11-28 13:00:25,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-28 13:00:25,635 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-11-28 13:00:25,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-28 13:00:25,636 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:00:25,636 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:00:25,637 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION]=== [2018-11-28 13:00:25,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:00:25,637 INFO L82 PathProgramCache]: Analyzing trace with hash -523138753, now seen corresponding path program 1 times [2018-11-28 13:00:25,637 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:00:25,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:00:25,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:00:25,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:00:25,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:00:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:00:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:00:25,697 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:00:25,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 13:00:25,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 13:00:25,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 13:00:25,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:00:25,699 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 3 states. [2018-11-28 13:00:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:00:25,739 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-11-28 13:00:25,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 13:00:25,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-11-28 13:00:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:00:25,739 INFO L225 Difference]: With dead ends: 39 [2018-11-28 13:00:25,740 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 13:00:25,740 INFO L631 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 [2018-11-28 13:00:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 13:00:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-28 13:00:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-28 13:00:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-11-28 13:00:25,743 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 8 [2018-11-28 13:00:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:00:25,743 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-11-28 13:00:25,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 13:00:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-11-28 13:00:25,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-28 13:00:25,743 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:00:25,743 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:00:25,744 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION]=== [2018-11-28 13:00:25,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:00:25,744 INFO L82 PathProgramCache]: Analyzing trace with hash -523138752, now seen corresponding path program 1 times [2018-11-28 13:00:25,744 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:00:25,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:00:25,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:00:25,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:00:25,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:00:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 13:00:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 13:00:25,790 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 13:00:25,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 01:00:25 BoogieIcfgContainer [2018-11-28 13:00:25,802 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 13:00:25,803 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 13:00:25,803 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 13:00:25,803 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 13:00:25,803 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:00:25" (3/4) ... [2018-11-28 13:00:25,805 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 13:00:25,832 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_cb94d41a-36c2-4a78-8c37-4b3a9e908b8b/bin-2019/uautomizer/witness.graphml [2018-11-28 13:00:25,832 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 13:00:25,833 INFO L168 Benchmark]: Toolchain (without parser) took 931.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 953.3 MB in the beginning and 1.1 GB in the end (delta: -123.7 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. [2018-11-28 13:00:25,834 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:00:25,834 INFO L168 Benchmark]: CACSL2BoogieTranslator took 157.21 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 11.5 GB. [2018-11-28 13:00:25,835 INFO L168 Benchmark]: Boogie Preprocessor took 69.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 942.3 MB in the beginning and 1.1 GB in the end (delta: -206.0 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. [2018-11-28 13:00:25,835 INFO L168 Benchmark]: RCFGBuilder took 276.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 11.5 GB. [2018-11-28 13:00:25,836 INFO L168 Benchmark]: TraceAbstraction took 395.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 39.3 MB). Peak memory consumption was 39.3 MB. Max. memory is 11.5 GB. [2018-11-28 13:00:25,836 INFO L168 Benchmark]: Witness Printer took 29.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-28 13:00:25,838 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 157.21 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 69.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 942.3 MB in the beginning and 1.1 GB in the end (delta: -206.0 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 276.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 395.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 39.3 MB). Peak memory consumption was 39.3 MB. Max. memory is 11.5 GB. * Witness Printer took 29.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 21]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L13] int MAX = __VERIFIER_nondet_uint(); [L14] char str1[MAX], str2[MAX]; [L15] int cont, i, j; [L16] cont = 0 [L18] i=0 VAL [cont=0, i=0, MAX=-2147483646, str1={2147483652:0}, str2={2147483653:0}] [L18] COND FALSE !(i