./Ultimate.py --spec /storage/repos/svcomp/c/properties/valid-memsafety.prp --file /storage/repos/svcomp/c/loops/invert_string_false-valid-deref.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 91b1670e Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/svcomp/c/loops/invert_string_false-valid-deref.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 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 0.1.24-91b1670 [2018-11-28 23:01:25,749 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 23:01:25,750 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 23:01:25,767 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 23:01:25,769 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 23:01:25,770 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 23:01:25,772 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 23:01:25,774 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 23:01:25,776 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 23:01:25,780 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 23:01:25,783 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 23:01:25,784 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 23:01:25,785 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 23:01:25,786 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 23:01:25,795 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 23:01:25,796 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 23:01:25,797 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 23:01:25,799 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 23:01:25,800 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 23:01:25,802 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 23:01:25,803 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 23:01:25,805 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 23:01:25,807 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 23:01:25,807 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 23:01:25,807 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 23:01:25,808 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 23:01:25,810 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 23:01:25,811 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 23:01:25,811 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 23:01:25,812 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 23:01:25,813 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 23:01:25,814 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 23:01:25,814 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 23:01:25,814 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 23:01:25,815 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 23:01:25,816 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 23:01:25,816 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-11-28 23:01:25,831 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 23:01:25,831 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 23:01:25,832 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 23:01:25,832 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 23:01:25,833 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 23:01:25,833 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 23:01:25,833 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 23:01:25,834 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 23:01:25,834 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 23:01:25,834 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 23:01:25,834 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 23:01:25,834 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 23:01:25,834 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 23:01:25,835 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-28 23:01:25,836 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-28 23:01:25,836 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-28 23:01:25,836 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 23:01:25,836 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 23:01:25,836 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 23:01:25,837 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 23:01:25,837 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 23:01:25,837 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 23:01:25,837 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 23:01:25,837 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 23:01:25,837 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 23:01:25,839 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 23:01:25,839 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 23:01:25,839 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 23:01:25,839 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 -> /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 -> 01c8dcbf548ac0eef8cebe655947adbb13d26f9a [2018-11-28 23:01:25,878 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 23:01:25,891 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 23:01:25,897 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 23:01:25,899 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 23:01:25,899 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 23:01:25,900 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loops/invert_string_false-valid-deref.c [2018-11-28 23:01:25,970 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9f81310/7a2acc73e9f5468e971aab99fc11a486/FLAG36a0decea [2018-11-28 23:01:26,423 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 23:01:26,424 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loops/invert_string_false-valid-deref.c [2018-11-28 23:01:26,431 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9f81310/7a2acc73e9f5468e971aab99fc11a486/FLAG36a0decea [2018-11-28 23:01:26,766 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9f81310/7a2acc73e9f5468e971aab99fc11a486 [2018-11-28 23:01:26,770 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 23:01:26,771 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-28 23:01:26,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 23:01:26,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 23:01:26,777 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 23:01:26,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:01:26" (1/1) ... [2018-11-28 23:01:26,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1465e9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:01:26, skipping insertion in model container [2018-11-28 23:01:26,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:01:26" (1/1) ... [2018-11-28 23:01:26,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 23:01:26,808 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 23:01:26,998 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 23:01:27,005 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 23:01:27,038 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 23:01:27,082 INFO L195 MainTranslator]: Completed translation [2018-11-28 23:01:27,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:01:27 WrapperNode [2018-11-28 23:01:27,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 23:01:27,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 23:01:27,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 23:01:27,085 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 23:01:27,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:01:27" (1/1) ... [2018-11-28 23:01:27,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:01:27" (1/1) ... [2018-11-28 23:01:27,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:01:27" (1/1) ... [2018-11-28 23:01:27,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:01:27" (1/1) ... [2018-11-28 23:01:27,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:01:27" (1/1) ... [2018-11-28 23:01:27,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:01:27" (1/1) ... [2018-11-28 23:01:27,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:01:27" (1/1) ... [2018-11-28 23:01:27,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 23:01:27,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 23:01:27,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 23:01:27,149 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 23:01:27,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:01:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 23:01:27,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 23:01:27,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 23:01:27,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-28 23:01:27,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 23:01:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-28 23:01:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-28 23:01:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-11-28 23:01:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-11-28 23:01:27,291 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 23:01:27,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 23:01:27,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 23:01:27,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-28 23:01:27,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 23:01:27,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 23:01:27,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 23:01:27,846 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 23:01:27,847 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-11-28 23:01:27,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:01:27 BoogieIcfgContainer [2018-11-28 23:01:27,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 23:01:27,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 23:01:27,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 23:01:27,852 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 23:01:27,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:01:26" (1/3) ... [2018-11-28 23:01:27,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d4fcb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:01:27, skipping insertion in model container [2018-11-28 23:01:27,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:01:27" (2/3) ... [2018-11-28 23:01:27,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d4fcb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:01:27, skipping insertion in model container [2018-11-28 23:01:27,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:01:27" (3/3) ... [2018-11-28 23:01:27,856 INFO L112 eAbstractionObserver]: Analyzing ICFG invert_string_false-valid-deref.c [2018-11-28 23:01:27,866 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 23:01:27,876 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2018-11-28 23:01:27,891 INFO L257 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2018-11-28 23:01:27,916 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 23:01:27,917 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 23:01:27,917 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-28 23:01:27,917 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 23:01:27,918 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 23:01:27,918 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 23:01:27,918 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 23:01:27,918 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 23:01:27,918 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 23:01:27,937 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-11-28 23:01:27,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-28 23:01:27,948 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 23:01:27,949 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 23:01:27,951 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 23:01:27,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:01:27,957 INFO L82 PathProgramCache]: Analyzing trace with hash -523138443, now seen corresponding path program 1 times [2018-11-28 23:01:27,959 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:01:27,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:01:28,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:01:28,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:01:28,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:01:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:01:28,103 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 23:01:28,106 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 23:01:28,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 23:01:28,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-28 23:01:28,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-28 23:01:28,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 23:01:28,133 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2018-11-28 23:01:28,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 23:01:28,158 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-11-28 23:01:28,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 23:01:28,160 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-11-28 23:01:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 23:01:28,170 INFO L225 Difference]: With dead ends: 47 [2018-11-28 23:01:28,171 INFO L226 Difference]: Without dead ends: 43 [2018-11-28 23:01:28,173 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 23:01:28,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-28 23:01:28,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-11-28 23:01:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-28 23:01:28,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-11-28 23:01:28,214 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 8 [2018-11-28 23:01:28,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 23:01:28,214 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-11-28 23:01:28,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-28 23:01:28,214 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-11-28 23:01:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-28 23:01:28,217 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 23:01:28,217 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 23:01:28,217 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 23:01:28,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:01:28,219 INFO L82 PathProgramCache]: Analyzing trace with hash -523138753, now seen corresponding path program 1 times [2018-11-28 23:01:28,219 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:01:28,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:01:28,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:01:28,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:01:28,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:01:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 23:01:28,316 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 23:01:28,316 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 23:01:28,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 23:01:28,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 23:01:28,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 23:01:28,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 23:01:28,319 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 3 states. [2018-11-28 23:01:28,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 23:01:28,435 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-11-28 23:01:28,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 23:01:28,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-11-28 23:01:28,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 23:01:28,436 INFO L225 Difference]: With dead ends: 39 [2018-11-28 23:01:28,436 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 23:01:28,438 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 23:01:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 23:01:28,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-28 23:01:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-28 23:01:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-11-28 23:01:28,444 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 8 [2018-11-28 23:01:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 23:01:28,445 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-11-28 23:01:28,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 23:01:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-11-28 23:01:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-28 23:01:28,445 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 23:01:28,445 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 23:01:28,446 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-11-28 23:01:28,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 23:01:28,446 INFO L82 PathProgramCache]: Analyzing trace with hash -523138752, now seen corresponding path program 1 times [2018-11-28 23:01:28,446 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 23:01:28,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 23:01:28,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:01:28,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 23:01:28,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 23:01:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:01:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 23:01:28,529 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 23:01:28,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 11:01:28 BoogieIcfgContainer [2018-11-28 23:01:28,548 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 23:01:28,549 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 23:01:28,549 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 23:01:28,549 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 23:01:28,549 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:01:27" (3/4) ... [2018-11-28 23:01:28,552 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 23:01:28,596 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 23:01:28,597 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 23:01:28,598 INFO L168 Benchmark]: Toolchain (without parser) took 1827.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 954.0 MB in the beginning and 1.1 GB in the end (delta: -119.8 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2018-11-28 23:01:28,600 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 23:01:28,600 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.66 ms. Allocated memory is still 1.0 GB. Free memory was 954.0 MB in the beginning and 943.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 23:01:28,601 INFO L168 Benchmark]: Boogie Preprocessor took 63.72 ms. Allocated memory is still 1.0 GB. Free memory is still 943.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 23:01:28,602 INFO L168 Benchmark]: RCFGBuilder took 699.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 943.3 MB in the beginning and 1.1 GB in the end (delta: -164.0 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-11-28 23:01:28,602 INFO L168 Benchmark]: TraceAbstraction took 699.78 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: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. [2018-11-28 23:01:28,603 INFO L168 Benchmark]: Witness Printer took 48.26 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 23:01:28,607 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 310.66 ms. Allocated memory is still 1.0 GB. Free memory was 954.0 MB in the beginning and 943.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 63.72 ms. Allocated memory is still 1.0 GB. Free memory is still 943.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 699.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 943.3 MB in the beginning and 1.1 GB in the end (delta: -164.0 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 699.78 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: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. * Witness Printer took 48.26 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. 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