./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/count_down_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/count_down_unsafe.i -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 744113fc2ef40828e0832f07c1176e726449b166 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 16:21:43,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 16:21:43,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 16:21:43,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 16:21:43,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 16:21:43,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 16:21:43,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 16:21:43,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 16:21:43,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 16:21:43,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 16:21:43,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 16:21:43,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 16:21:43,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 16:21:43,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 16:21:43,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 16:21:43,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 16:21:43,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 16:21:43,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 16:21:43,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 16:21:43,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 16:21:43,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 16:21:43,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 16:21:43,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 16:21:43,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 16:21:43,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 16:21:43,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 16:21:43,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 16:21:43,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 16:21:43,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 16:21:43,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 16:21:43,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 16:21:43,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 16:21:43,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 16:21:43,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 16:21:43,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 16:21:43,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 16:21:43,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 16:21:43,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 16:21:43,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 16:21:43,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 16:21:43,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 16:21:43,668 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 16:21:43,695 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 16:21:43,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 16:21:43,696 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 16:21:43,697 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 16:21:43,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 16:21:43,698 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 16:21:43,698 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 16:21:43,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 16:21:43,698 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 16:21:43,699 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 16:21:43,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 16:21:43,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 16:21:43,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 16:21:43,700 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 16:21:43,700 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 16:21:43,700 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 16:21:43,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 16:21:43,707 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 16:21:43,707 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 16:21:43,707 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 16:21:43,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 16:21:43,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 16:21:43,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 16:21:43,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:21:43,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 16:21:43,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 16:21:43,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 16:21:43,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 16:21:43,708 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 16:21:43,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 744113fc2ef40828e0832f07c1176e726449b166 [2021-08-30 16:21:43,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 16:21:43,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 16:21:43,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 16:21:43,985 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 16:21:43,986 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 16:21:43,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/count_down_unsafe.i [2021-08-30 16:21:44,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1315f9476/4a22ead42751458bb956dbfc5bed1f80/FLAG8b7aa131b [2021-08-30 16:21:44,415 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 16:21:44,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/count_down_unsafe.i [2021-08-30 16:21:44,430 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1315f9476/4a22ead42751458bb956dbfc5bed1f80/FLAG8b7aa131b [2021-08-30 16:21:44,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1315f9476/4a22ead42751458bb956dbfc5bed1f80 [2021-08-30 16:21:44,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 16:21:44,442 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 16:21:44,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 16:21:44,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 16:21:44,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 16:21:44,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:21:44" (1/1) ... [2021-08-30 16:21:44,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@486e44f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:44, skipping insertion in model container [2021-08-30 16:21:44,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:21:44" (1/1) ... [2021-08-30 16:21:44,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 16:21:44,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 16:21:44,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:21:44,609 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 16:21:44,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:21:44,680 INFO L208 MainTranslator]: Completed translation [2021-08-30 16:21:44,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:44 WrapperNode [2021-08-30 16:21:44,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 16:21:44,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 16:21:44,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 16:21:44,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 16:21:44,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:44" (1/1) ... [2021-08-30 16:21:44,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:44" (1/1) ... [2021-08-30 16:21:44,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:44" (1/1) ... [2021-08-30 16:21:44,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:44" (1/1) ... [2021-08-30 16:21:44,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:44" (1/1) ... [2021-08-30 16:21:44,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:44" (1/1) ... [2021-08-30 16:21:44,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:44" (1/1) ... [2021-08-30 16:21:44,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 16:21:44,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 16:21:44,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 16:21:44,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 16:21:44,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:44" (1/1) ... [2021-08-30 16:21:44,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:21:44,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:21:44,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-30 16:21:44,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-30 16:21:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 16:21:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 16:21:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 16:21:44,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 16:21:44,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 16:21:44,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 16:21:44,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 16:21:44,792 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 16:21:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 16:21:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 16:21:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 16:21:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 16:21:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 16:21:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 16:21:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 16:21:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 16:21:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 16:21:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 16:21:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 16:21:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 16:21:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 16:21:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 16:21:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 16:21:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 16:21:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 16:21:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 16:21:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 16:21:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 16:21:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 16:21:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 16:21:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 16:21:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 16:21:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 16:21:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 16:21:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 16:21:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 16:21:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 16:21:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 16:21:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 16:21:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 16:21:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 16:21:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 16:21:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 16:21:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 16:21:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 16:21:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 16:21:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 16:21:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 16:21:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 16:21:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 16:21:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 16:21:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 16:21:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 16:21:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 16:21:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 16:21:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 16:21:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 16:21:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 16:21:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 16:21:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 16:21:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 16:21:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 16:21:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 16:21:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 16:21:44,800 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 16:21:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 16:21:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 16:21:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 16:21:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 16:21:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 16:21:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 16:21:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 16:21:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 16:21:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 16:21:44,802 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 16:21:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 16:21:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 16:21:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 16:21:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 16:21:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 16:21:44,803 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 16:21:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 16:21:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 16:21:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 16:21:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 16:21:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 16:21:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 16:21:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 16:21:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 16:21:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 16:21:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 16:21:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 16:21:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 16:21:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 16:21:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 16:21:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 16:21:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 16:21:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 16:21:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 16:21:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 16:21:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 16:21:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 16:21:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 16:21:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 16:21:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 16:21:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 16:21:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 16:21:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 16:21:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 16:21:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 16:21:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 16:21:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 16:21:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 16:21:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 16:21:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 16:21:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 16:21:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 16:21:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 16:21:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 16:21:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 16:21:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 16:21:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 16:21:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 16:21:45,088 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 16:21:45,088 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-30 16:21:45,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:21:45 BoogieIcfgContainer [2021-08-30 16:21:45,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 16:21:45,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 16:21:45,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 16:21:45,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 16:21:45,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:21:44" (1/3) ... [2021-08-30 16:21:45,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@754e0f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:21:45, skipping insertion in model container [2021-08-30 16:21:45,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:21:44" (2/3) ... [2021-08-30 16:21:45,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@754e0f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:21:45, skipping insertion in model container [2021-08-30 16:21:45,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:21:45" (3/3) ... [2021-08-30 16:21:45,094 INFO L111 eAbstractionObserver]: Analyzing ICFG count_down_unsafe.i [2021-08-30 16:21:45,098 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 16:21:45,098 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-08-30 16:21:45,132 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 16:21:45,136 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, mConcurrency=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 [2021-08-30 16:21:45,136 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-08-30 16:21:45,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:21:45,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 16:21:45,149 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:21:45,149 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:21:45,150 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-08-30 16:21:45,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:21:45,153 INFO L82 PathProgramCache]: Analyzing trace with hash -587521551, now seen corresponding path program 1 times [2021-08-30 16:21:45,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:21:45,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58062297] [2021-08-30 16:21:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:21:45,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:21:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:21:45,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:21:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:21:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:21:45,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:21:45,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58062297] [2021-08-30 16:21:45,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58062297] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:21:45,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:21:45,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:21:45,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594728275] [2021-08-30 16:21:45,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:21:45,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:21:45,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:21:45,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:21:45,379 INFO L87 Difference]: Start difference. First operand has 36 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:21:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:21:45,454 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-08-30 16:21:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:21:45,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 16:21:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:21:45,464 INFO L225 Difference]: With dead ends: 36 [2021-08-30 16:21:45,464 INFO L226 Difference]: Without dead ends: 33 [2021-08-30 16:21:45,465 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.00ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:21:45,467 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.74ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.49ms IncrementalHoareTripleChecker+Time [2021-08-30 16:21:45,468 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 9 Invalid, 80 Unknown, 0 Unchecked, 1.74ms Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 60.49ms Time] [2021-08-30 16:21:45,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-30 16:21:45,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-30 16:21:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.619047619047619) internal successors, (34), 29 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:21:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-08-30 16:21:45,489 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2021-08-30 16:21:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:21:45,490 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-08-30 16:21:45,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:21:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-08-30 16:21:45,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-30 16:21:45,490 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:21:45,491 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:21:45,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 16:21:45,491 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-08-30 16:21:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:21:45,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1967514850, now seen corresponding path program 1 times [2021-08-30 16:21:45,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:21:45,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063745341] [2021-08-30 16:21:45,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:21:45,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:21:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:21:45,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:21:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:21:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:21:45,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:21:45,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063745341] [2021-08-30 16:21:45,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063745341] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:21:45,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:21:45,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:21:45,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883717811] [2021-08-30 16:21:45,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:21:45,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:21:45,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:21:45,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:21:45,530 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:21:45,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:21:45,571 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-08-30 16:21:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:21:45,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-08-30 16:21:45,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:21:45,572 INFO L225 Difference]: With dead ends: 29 [2021-08-30 16:21:45,572 INFO L226 Difference]: Without dead ends: 29 [2021-08-30 16:21:45,572 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.93ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:21:45,589 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.74ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.00ms IncrementalHoareTripleChecker+Time [2021-08-30 16:21:45,590 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 7 Invalid, 68 Unknown, 0 Unchecked, 0.74ms Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 37.00ms Time] [2021-08-30 16:21:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-30 16:21:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-30 16:21:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 25 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:21:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-08-30 16:21:45,593 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 12 [2021-08-30 16:21:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:21:45,593 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-08-30 16:21:45,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:21:45,594 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-08-30 16:21:45,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-30 16:21:45,594 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:21:45,594 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:21:45,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 16:21:45,595 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-08-30 16:21:45,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:21:45,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1967514849, now seen corresponding path program 1 times [2021-08-30 16:21:45,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:21:45,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242973519] [2021-08-30 16:21:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:21:45,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:21:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 16:21:45,623 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 16:21:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 16:21:45,649 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-30 16:21:45,650 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 16:21:45,650 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr1REQUIRES_VIOLATION (8 of 9 remaining) [2021-08-30 16:21:45,651 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (7 of 9 remaining) [2021-08-30 16:21:45,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (6 of 9 remaining) [2021-08-30 16:21:45,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (5 of 9 remaining) [2021-08-30 16:21:45,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION (4 of 9 remaining) [2021-08-30 16:21:45,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION (3 of 9 remaining) [2021-08-30 16:21:45,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION (2 of 9 remaining) [2021-08-30 16:21:45,653 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (1 of 9 remaining) [2021-08-30 16:21:45,653 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2021-08-30 16:21:45,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 16:21:45,657 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 16:21:45,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:21:45 BoogieIcfgContainer [2021-08-30 16:21:45,677 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 16:21:45,678 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 16:21:45,678 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 16:21:45,678 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 16:21:45,678 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:21:45" (3/4) ... [2021-08-30 16:21:45,679 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-30 16:21:45,707 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 16:21:45,707 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 16:21:45,708 INFO L158 Benchmark]: Toolchain (without parser) took 1265.99ms. Allocated memory was 48.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Free memory was 22.0MB in the beginning and 34.1MB in the end (delta: -12.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 16:21:45,708 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 48.2MB. Free memory was 29.9MB in the beginning and 29.9MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 16:21:45,708 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.22ms. Allocated memory is still 48.2MB. Free memory was 32.8MB in the beginning and 26.6MB in the end (delta: 6.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-30 16:21:45,709 INFO L158 Benchmark]: Boogie Preprocessor took 59.01ms. Allocated memory is still 48.2MB. Free memory was 26.6MB in the beginning and 24.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:21:45,709 INFO L158 Benchmark]: RCFGBuilder took 348.51ms. Allocated memory is still 48.2MB. Free memory was 24.3MB in the beginning and 26.4MB in the end (delta: -2.1MB). Peak memory consumption was 8.3MB. Max. memory is 16.1GB. [2021-08-30 16:21:45,709 INFO L158 Benchmark]: TraceAbstraction took 587.05ms. Allocated memory was 48.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Free memory was 25.8MB in the beginning and 35.9MB in the end (delta: -10.1MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. [2021-08-30 16:21:45,710 INFO L158 Benchmark]: Witness Printer took 29.50ms. Allocated memory is still 58.7MB. Free memory was 35.9MB in the beginning and 34.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:21:45,711 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 48.2MB. Free memory was 29.9MB in the beginning and 29.9MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 234.22ms. Allocated memory is still 48.2MB. Free memory was 32.8MB in the beginning and 26.6MB in the end (delta: 6.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.01ms. Allocated memory is still 48.2MB. Free memory was 26.6MB in the beginning and 24.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 348.51ms. Allocated memory is still 48.2MB. Free memory was 24.3MB in the beginning and 26.4MB in the end (delta: -2.1MB). Peak memory consumption was 8.3MB. Max. memory is 16.1GB. * TraceAbstraction took 587.05ms. Allocated memory was 48.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Free memory was 25.8MB in the beginning and 35.9MB in the end (delta: -10.1MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. * Witness Printer took 29.50ms. Allocated memory is still 58.7MB. Free memory was 35.9MB in the beginning and 34.1MB in the end (delta: 1.8MB). 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, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 524]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L513] int i, j; [L514] int val; [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L516] length = 1 VAL [length=1] [L517] int *arr = __builtin_alloca (length); VAL [__builtin_alloca (length)={2:0}, arr={2:0}, length=1] [L518] COND FALSE !(!arr) [L519] i=0 VAL [__builtin_alloca (length)={2:0}, arr={2:0}, i=0, length=1] [L519] COND TRUE i