./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/alias_of_return.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/alias_of_return.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06301ba1d9ec863b6cc8897b223f4a327ace47ed ................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:22:13,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:22:13,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:22:13,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:22:13,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:22:13,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:22:13,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:22:13,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:22:13,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:22:13,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:22:13,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:22:13,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:22:13,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:22:13,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:22:13,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:22:13,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:22:13,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:22:13,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:22:13,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:22:13,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:22:13,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:22:13,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:22:13,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:22:13,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:22:13,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:22:13,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:22:13,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:22:13,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:22:13,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:22:13,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:22:13,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:22:13,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:22:13,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:22:13,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:22:13,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:22:13,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:22:13,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:22:13,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:22:13,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:22:13,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:22:13,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:22:13,952 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:22:13,996 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:22:13,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:22:13,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:22:13,999 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:22:13,999 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:22:13,999 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:22:13,999 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:22:14,000 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:22:14,009 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:22:14,010 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:22:14,011 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:22:14,011 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:22:14,012 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:22:14,012 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:22:14,012 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:22:14,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:22:14,014 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:22:14,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:22:14,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:22:14,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:22:14,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:22:14,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:22:14,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:22:14,016 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:22:14,016 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:22:14,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:22:14,016 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:22:14,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:22:14,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:22:14,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:22:14,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:22:14,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:22:14,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:22:14,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:22:14,019 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:22:14,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:22:14,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:22:14,020 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:22:14,020 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:22:14,020 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/bin/utaipan-WLngWcDbfI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06301ba1d9ec863b6cc8897b223f4a327ace47ed [2021-10-11 02:22:14,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:22:14,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:22:14,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:22:14,397 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:22:14,401 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:22:14,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/ldv-regression/alias_of_return.i [2021-10-11 02:22:14,522 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/bin/utaipan-WLngWcDbfI/data/2034be621/c010d0ca0d0b4d24a8f88f61a45ed03f/FLAG256f02acf [2021-10-11 02:22:14,994 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:22:14,994 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/sv-benchmarks/c/ldv-regression/alias_of_return.i [2021-10-11 02:22:15,001 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/bin/utaipan-WLngWcDbfI/data/2034be621/c010d0ca0d0b4d24a8f88f61a45ed03f/FLAG256f02acf [2021-10-11 02:22:15,373 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/bin/utaipan-WLngWcDbfI/data/2034be621/c010d0ca0d0b4d24a8f88f61a45ed03f [2021-10-11 02:22:15,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:22:15,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:22:15,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:22:15,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:22:15,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:22:15,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:15" (1/1) ... [2021-10-11 02:22:15,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a86051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:15, skipping insertion in model container [2021-10-11 02:22:15,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:15" (1/1) ... [2021-10-11 02:22:15,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:22:15,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:22:15,563 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/sv-benchmarks/c/ldv-regression/alias_of_return.i[288,301] [2021-10-11 02:22:15,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:22:15,612 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:22:15,630 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/sv-benchmarks/c/ldv-regression/alias_of_return.i[288,301] [2021-10-11 02:22:15,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:22:15,652 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:22:15,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:15 WrapperNode [2021-10-11 02:22:15,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:22:15,657 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:22:15,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:22:15,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:22:15,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:15" (1/1) ... [2021-10-11 02:22:15,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:15" (1/1) ... [2021-10-11 02:22:15,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:22:15,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:22:15,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:22:15,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:22:15,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:15" (1/1) ... [2021-10-11 02:22:15,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:15" (1/1) ... [2021-10-11 02:22:15,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:15" (1/1) ... [2021-10-11 02:22:15,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:15" (1/1) ... [2021-10-11 02:22:15,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:15" (1/1) ... [2021-10-11 02:22:15,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:15" (1/1) ... [2021-10-11 02:22:15,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:15" (1/1) ... [2021-10-11 02:22:15,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:22:15,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:22:15,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:22:15,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:22:15,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:15" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:22:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:22:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:22:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:22:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:22:15,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:22:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:22:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:22:16,117 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:22:16,117 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:22:16,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:16 BoogieIcfgContainer [2021-10-11 02:22:16,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:22:16,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:22:16,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:22:16,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:22:16,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:22:15" (1/3) ... [2021-10-11 02:22:16,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b5ca15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:16, skipping insertion in model container [2021-10-11 02:22:16,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:15" (2/3) ... [2021-10-11 02:22:16,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b5ca15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:16, skipping insertion in model container [2021-10-11 02:22:16,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:16" (3/3) ... [2021-10-11 02:22:16,130 INFO L111 eAbstractionObserver]: Analyzing ICFG alias_of_return.i [2021-10-11 02:22:16,146 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:22:16,150 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:22:16,164 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:22:16,192 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:22:16,192 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:22:16,192 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:22:16,192 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:22:16,193 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:22:16,193 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:22:16,193 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:22:16,193 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:22:16,207 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2021-10-11 02:22:16,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:22:16,213 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:16,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:22:16,214 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:16,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:16,221 INFO L82 PathProgramCache]: Analyzing trace with hash 49237, now seen corresponding path program 1 times [2021-10-11 02:22:16,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:16,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537411706] [2021-10-11 02:22:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:16,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537411706] [2021-10-11 02:22:16,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:16,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:22:16,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447218699] [2021-10-11 02:22:16,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:22:16,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:16,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:22:16,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:16,452 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2021-10-11 02:22:16,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:16,471 INFO L93 Difference]: Finished difference Result 8 states and 7 transitions. [2021-10-11 02:22:16,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:22:16,473 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:22:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:16,481 INFO L225 Difference]: With dead ends: 8 [2021-10-11 02:22:16,481 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:22:16,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:16,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:22:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:22:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:22:16,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:22:16,533 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 3 [2021-10-11 02:22:16,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:16,534 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:22:16,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:22:16,534 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:22:16,535 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:22:16,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:22:16,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:22:16,547 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:22:16,547 INFO L262 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2021-10-11 02:22:16,547 INFO L262 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2021-10-11 02:22:16,548 INFO L265 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-10-11 02:22:16,548 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2021-10-11 02:22:16,548 INFO L262 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2021-10-11 02:22:16,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:22:16 BoogieIcfgContainer [2021-10-11 02:22:16,558 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:22:16,559 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:22:16,559 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:22:16,559 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:22:16,560 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:16" (3/4) ... [2021-10-11 02:22:16,563 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:22:16,575 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-11 02:22:16,575 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-11 02:22:16,575 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:22:16,576 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:22:16,622 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f6fd821-55a8-443b-ab1a-5e104e38356c/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:22:16,622 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:22:16,625 INFO L168 Benchmark]: Toolchain (without parser) took 1245.37 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 59.2 MB in the beginning and 98.6 MB in the end (delta: -39.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:16,626 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 92.3 MB. Free memory was 61.9 MB in the beginning and 61.9 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:16,628 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.63 ms. Allocated memory is still 92.3 MB. Free memory was 59.0 MB in the beginning and 70.4 MB in the end (delta: -11.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:16,629 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.04 ms. Allocated memory is still 92.3 MB. Free memory was 70.4 MB in the beginning and 69.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:16,630 INFO L168 Benchmark]: Boogie Preprocessor took 40.63 ms. Allocated memory is still 92.3 MB. Free memory was 69.1 MB in the beginning and 68.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:16,632 INFO L168 Benchmark]: RCFGBuilder took 374.07 ms. Allocated memory is still 92.3 MB. Free memory was 68.0 MB in the beginning and 52.4 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:16,633 INFO L168 Benchmark]: TraceAbstraction took 435.85 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 52.0 MB in the beginning and 100.9 MB in the end (delta: -48.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:16,635 INFO L168 Benchmark]: Witness Printer took 63.89 ms. Allocated memory is still 123.7 MB. Free memory was 100.9 MB in the beginning and 98.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:16,643 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 92.3 MB. Free memory was 61.9 MB in the beginning and 61.9 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 275.63 ms. Allocated memory is still 92.3 MB. Free memory was 59.0 MB in the beginning and 70.4 MB in the end (delta: -11.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.04 ms. Allocated memory is still 92.3 MB. Free memory was 70.4 MB in the beginning and 69.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.63 ms. Allocated memory is still 92.3 MB. Free memory was 69.1 MB in the beginning and 68.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 374.07 ms. Allocated memory is still 92.3 MB. Free memory was 68.0 MB in the beginning and 52.4 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 435.85 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 52.0 MB in the beginning and 100.9 MB in the end (delta: -48.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 63.89 ms. Allocated memory is still 123.7 MB. Free memory was 100.9 MB in the beginning and 98.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: -1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 2 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 1 NumberOfFragments, 1 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 8 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...