./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/nested_structure_ptr-2.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-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/nested_structure_ptr-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/bin/utaipan --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 91b4b40d1d7f36b3a3986763f89b3e51f45025d6 ................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:31:29,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:31:29,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:31:29,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:31:29,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:31:29,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:31:29,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:31:29,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:31:29,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:31:29,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:31:29,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:31:29,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:31:29,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:31:29,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:31:29,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:31:29,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:31:29,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:31:29,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:31:29,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:31:29,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:31:29,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:31:29,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:31:29,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:31:29,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:31:29,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:31:29,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:31:29,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:31:29,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:31:29,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:31:29,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:31:29,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:31:29,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:31:29,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:31:29,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:31:29,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:31:29,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:31:29,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:31:29,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:31:29,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:31:29,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:31:29,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:31:29,668 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-03 12:31:29,711 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:31:29,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:31:29,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:31:29,713 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:31:29,713 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:31:29,713 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:31:29,713 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:31:29,714 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:31:29,714 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:31:29,714 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:31:29,715 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:31:29,715 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:31:29,715 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:31:29,716 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:31:29,716 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:31:29,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:31:29,717 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:31:29,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:31:29,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:31:29,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:31:29,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:31:29,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:31:29,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:31:29,718 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:31:29,718 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:31:29,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:31:29,719 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:31:29,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:31:29,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:31:29,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:31:29,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:31:29,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:31:29,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:31:29,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:31:29,722 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:31:29,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:31:29,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:31:29,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:31:29,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:31:29,723 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-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 91b4b40d1d7f36b3a3986763f89b3e51f45025d6 [2020-12-03 12:31:30,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:31:30,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:31:30,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:31:30,070 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:31:30,071 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:31:30,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/bin/utaipan/../../sv-benchmarks/c/ldv-regression/nested_structure_ptr-2.i [2020-12-03 12:31:30,137 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/bin/utaipan/data/bb84a7e39/799ff832c6d04d0da567d156decdd552/FLAGe0469c9ed [2020-12-03 12:31:30,614 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:31:30,614 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/sv-benchmarks/c/ldv-regression/nested_structure_ptr-2.i [2020-12-03 12:31:30,620 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/bin/utaipan/data/bb84a7e39/799ff832c6d04d0da567d156decdd552/FLAGe0469c9ed [2020-12-03 12:31:31,001 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/bin/utaipan/data/bb84a7e39/799ff832c6d04d0da567d156decdd552 [2020-12-03 12:31:31,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:31:31,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:31:31,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:31:31,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:31:31,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:31:31,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:31:31" (1/1) ... [2020-12-03 12:31:31,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dbf5930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:31, skipping insertion in model container [2020-12-03 12:31:31,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:31:31" (1/1) ... [2020-12-03 12:31:31,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:31:31,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:31:31,224 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/sv-benchmarks/c/ldv-regression/nested_structure_ptr-2.i[822,835] [2020-12-03 12:31:31,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:31:31,257 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:31:31,269 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/sv-benchmarks/c/ldv-regression/nested_structure_ptr-2.i[822,835] [2020-12-03 12:31:31,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:31:31,288 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:31:31,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:31 WrapperNode [2020-12-03 12:31:31,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:31:31,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:31:31,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:31:31,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:31:31,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:31" (1/1) ... [2020-12-03 12:31:31,305 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:31" (1/1) ... [2020-12-03 12:31:31,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:31:31,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:31:31,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:31:31,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:31:31,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:31" (1/1) ... [2020-12-03 12:31:31,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:31" (1/1) ... [2020-12-03 12:31:31,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:31" (1/1) ... [2020-12-03 12:31:31,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:31" (1/1) ... [2020-12-03 12:31:31,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:31" (1/1) ... [2020-12-03 12:31:31,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:31" (1/1) ... [2020-12-03 12:31:31,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:31" (1/1) ... [2020-12-03 12:31:31,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:31:31,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:31:31,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:31:31,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:31:31,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/bin/utaipan/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 [2020-12-03 12:31:31,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-03 12:31:31,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-03 12:31:31,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 12:31:31,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:31:31,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-03 12:31:31,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:31:31,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:31:31,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-03 12:31:31,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-03 12:31:31,859 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:31:31,859 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-03 12:31:31,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:31:31 BoogieIcfgContainer [2020-12-03 12:31:31,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:31:31,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:31:31,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:31:31,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:31:31,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:31:31" (1/3) ... [2020-12-03 12:31:31,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601988c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:31:31, skipping insertion in model container [2020-12-03 12:31:31,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:31" (2/3) ... [2020-12-03 12:31:31,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601988c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:31:31, skipping insertion in model container [2020-12-03 12:31:31,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:31:31" (3/3) ... [2020-12-03 12:31:31,879 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_structure_ptr-2.i [2020-12-03 12:31:31,892 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:31:31,896 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-03 12:31:31,907 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-03 12:31:31,929 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:31:31,930 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:31:31,930 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:31:31,930 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:31:31,931 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:31:31,931 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:31:31,931 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:31:31,931 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:31:31,943 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-12-03 12:31:31,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-03 12:31:31,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:31:31,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-03 12:31:31,949 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:31:31,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:31:31,954 INFO L82 PathProgramCache]: Analyzing trace with hash 46290, now seen corresponding path program 1 times [2020-12-03 12:31:31,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:31:31,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757726240] [2020-12-03 12:31:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:31:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:31:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:31:32,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757726240] [2020-12-03 12:31:32,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:31:32,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:31:32,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355760372] [2020-12-03 12:31:32,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:31:32,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:31:32,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:31:32,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:31:32,272 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2020-12-03 12:31:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:31:32,288 INFO L93 Difference]: Finished difference Result 8 states and 7 transitions. [2020-12-03 12:31:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:31:32,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-03 12:31:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:31:32,296 INFO L225 Difference]: With dead ends: 8 [2020-12-03 12:31:32,296 INFO L226 Difference]: Without dead ends: 0 [2020-12-03 12:31:32,299 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 [2020-12-03 12:31:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-03 12:31:32,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-03 12:31:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-03 12:31:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-03 12:31:32,323 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 3 [2020-12-03 12:31:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:31:32,323 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-03 12:31:32,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:31:32,324 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-03 12:31:32,324 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-03 12:31:32,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:31:32,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-03 12:31:32,336 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-03 12:31:32,336 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-03 12:31:32,337 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-12-03 12:31:32,337 INFO L262 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-12-03 12:31:32,337 INFO L262 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-12-03 12:31:32,337 INFO L258 CegarLoopResult]: At program point L14-2(lines 13 18) the Hoare annotation is: (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) [2020-12-03 12:31:32,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:31:32 BoogieIcfgContainer [2020-12-03 12:31:32,351 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:31:32,352 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:31:32,352 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:31:32,352 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:31:32,353 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:31:31" (3/4) ... [2020-12-03 12:31:32,355 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-03 12:31:32,365 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-03 12:31:32,365 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-03 12:31:32,365 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-03 12:31:32,365 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-03 12:31:32,403 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a779a83a-c87b-4419-927e-53a52c7778f9/bin/utaipan/witness.graphml [2020-12-03 12:31:32,403 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:31:32,405 INFO L168 Benchmark]: Toolchain (without parser) took 1399.36 ms. Allocated memory is still 111.1 MB. Free memory was 79.9 MB in the beginning and 77.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 1.8 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:32,406 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 81.8 MB. Free memory was 41.9 MB in the beginning and 41.9 MB in the end (delta: 36.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:31:32,406 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.11 ms. Allocated memory is still 111.1 MB. Free memory was 79.6 MB in the beginning and 86.6 MB in the end (delta: -7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:32,407 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.10 ms. Allocated memory is still 111.1 MB. Free memory was 86.6 MB in the beginning and 85.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:32,407 INFO L168 Benchmark]: Boogie Preprocessor took 20.54 ms. Allocated memory is still 111.1 MB. Free memory was 85.4 MB in the beginning and 84.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:31:32,408 INFO L168 Benchmark]: RCFGBuilder took 520.02 ms. Allocated memory is still 111.1 MB. Free memory was 84.1 MB in the beginning and 67.7 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:32,408 INFO L168 Benchmark]: TraceAbstraction took 486.73 ms. Allocated memory is still 111.1 MB. Free memory was 67.4 MB in the beginning and 79.8 MB in the end (delta: -12.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:31:32,409 INFO L168 Benchmark]: Witness Printer took 51.76 ms. Allocated memory is still 111.1 MB. Free memory was 79.8 MB in the beginning and 77.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:31:32,412 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 81.8 MB. Free memory was 41.9 MB in the beginning and 41.9 MB in the end (delta: 36.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 270.11 ms. Allocated memory is still 111.1 MB. Free memory was 79.6 MB in the beginning and 86.6 MB in the end (delta: -7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.10 ms. Allocated memory is still 111.1 MB. Free memory was 86.6 MB in the beginning and 85.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.54 ms. Allocated memory is still 111.1 MB. Free memory was 85.4 MB in the beginning and 84.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 520.02 ms. Allocated memory is still 111.1 MB. Free memory was 84.1 MB in the beginning and 67.7 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 486.73 ms. Allocated memory is still 111.1 MB. Free memory was 67.4 MB in the beginning and 79.8 MB in the end (delta: -12.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 51.76 ms. Allocated memory is still 111.1 MB. Free memory was 79.8 MB in the beginning and 77.4 MB in the end (delta: 2.5 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: 15]: 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: 13]: Loop Invariant Derived loop invariant: !(0 == cond) - 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, 2 SDslu, 0 SDs, 0 SdLazy, 1 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, 2 NumberOfFragments, 4 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 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...