./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/nested_structure-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/nested_structure-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/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 ce7b4c27a33a76fee7e236f9d14730a3f20cacd2 .................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:56:25,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:56:25,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:56:25,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:56:25,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:56:25,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:56:25,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:56:25,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:56:25,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:56:25,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:56:25,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:56:25,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:56:25,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:56:25,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:56:25,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:56:25,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:56:25,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:56:25,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:56:25,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:56:25,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:56:25,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:56:25,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:56:25,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:56:25,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:56:25,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:56:25,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:56:25,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:56:25,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:56:25,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:56:25,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:56:25,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:56:25,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:56:25,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:56:25,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:56:25,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:56:25,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:56:25,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:56:25,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:56:25,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:56:25,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:56:25,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:56:25,787 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:56:25,813 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:56:25,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:56:25,814 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:56:25,815 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:56:25,815 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:56:25,815 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:56:25,815 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:56:25,815 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:56:25,816 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:56:25,816 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:56:25,816 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:56:25,816 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:56:25,816 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:56:25,817 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:56:25,817 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:56:25,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:56:25,818 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:56:25,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:56:25,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:56:25,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:56:25,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:56:25,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:56:25,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:56:25,819 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:56:25,819 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:56:25,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:56:25,820 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:56:25,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:56:25,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:56:25,820 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:56:25,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:56:25,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:56:25,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:56:25,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:56:25,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:56:25,821 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:56:25,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:56:25,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:56:25,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:56:25,822 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:56:25,822 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_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce7b4c27a33a76fee7e236f9d14730a3f20cacd2 [2020-11-22 12:56:26,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:56:26,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:56:26,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:56:26,108 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:56:26,109 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:56:26,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/bin/utaipan/../../sv-benchmarks/c/ldv-regression/nested_structure-2.i [2020-11-22 12:56:26,187 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/bin/utaipan/data/f9e8cac12/fda26845734e4a38944ad17ed3baa21b/FLAG359e3c3b5 [2020-11-22 12:56:26,671 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:56:26,672 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/sv-benchmarks/c/ldv-regression/nested_structure-2.i [2020-11-22 12:56:26,688 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/bin/utaipan/data/f9e8cac12/fda26845734e4a38944ad17ed3baa21b/FLAG359e3c3b5 [2020-11-22 12:56:27,033 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/bin/utaipan/data/f9e8cac12/fda26845734e4a38944ad17ed3baa21b [2020-11-22 12:56:27,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:56:27,038 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:56:27,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:56:27,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:56:27,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:56:27,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:56:27" (1/1) ... [2020-11-22 12:56:27,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1602e325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:27, skipping insertion in model container [2020-11-22 12:56:27,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:56:27" (1/1) ... [2020-11-22 12:56:27,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:56:27,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:56:27,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:56:27,318 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:56:27,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:56:27,350 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:56:27,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:27 WrapperNode [2020-11-22 12:56:27,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:56:27,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:56:27,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:56:27,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:56:27,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:27" (1/1) ... [2020-11-22 12:56:27,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:27" (1/1) ... [2020-11-22 12:56:27,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:56:27,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:56:27,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:56:27,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:56:27,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:27" (1/1) ... [2020-11-22 12:56:27,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:27" (1/1) ... [2020-11-22 12:56:27,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:27" (1/1) ... [2020-11-22 12:56:27,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:27" (1/1) ... [2020-11-22 12:56:27,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:27" (1/1) ... [2020-11-22 12:56:27,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:27" (1/1) ... [2020-11-22 12:56:27,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:27" (1/1) ... [2020-11-22 12:56:27,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:56:27,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:56:27,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:56:27,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:56:27,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/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 [2020-11-22 12:56:27,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-22 12:56:27,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-11-22 12:56:27,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:56:27,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:56:27,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 12:56:27,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:56:27,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:56:27,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 12:56:27,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:56:28,002 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:56:28,003 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-22 12:56:28,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:56:28 BoogieIcfgContainer [2020-11-22 12:56:28,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:56:28,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:56:28,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:56:28,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:56:28,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:56:27" (1/3) ... [2020-11-22 12:56:28,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa1ee18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:56:28, skipping insertion in model container [2020-11-22 12:56:28,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:27" (2/3) ... [2020-11-22 12:56:28,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa1ee18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:56:28, skipping insertion in model container [2020-11-22 12:56:28,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:56:28" (3/3) ... [2020-11-22 12:56:28,015 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_structure-2.i [2020-11-22 12:56:28,028 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:56:28,034 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 12:56:28,045 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 12:56:28,101 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:56:28,101 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:56:28,101 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:56:28,101 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:56:28,102 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:56:28,102 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:56:28,102 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:56:28,102 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:56:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2020-11-22 12:56:28,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 12:56:28,124 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:56:28,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 12:56:28,125 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:56:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:56:28,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1693667, now seen corresponding path program 1 times [2020-11-22 12:56:28,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:56:28,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613586251] [2020-11-22 12:56:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:56:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:56:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:56:28,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613586251] [2020-11-22 12:56:28,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:56:28,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:56:28,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558223042] [2020-11-22 12:56:28,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:56:28,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:56:28,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:56:28,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:56:28,506 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2020-11-22 12:56:28,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:56:28,524 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2020-11-22 12:56:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:56:28,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-22 12:56:28,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:56:28,532 INFO L225 Difference]: With dead ends: 10 [2020-11-22 12:56:28,533 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:56:28,535 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 [2020-11-22 12:56:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:56:28,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:56:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:56:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:56:28,561 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2020-11-22 12:56:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:56:28,561 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:56:28,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:56:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:56:28,562 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:56:28,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:56:28,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 12:56:28,578 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 12:56:28,578 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 12:56:28,578 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-22 12:56:28,578 INFO L274 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-11-22 12:56:28,578 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-22 12:56:28,578 INFO L270 CegarLoopResult]: At program point L14-2(lines 13 18) the Hoare annotation is: (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) [2020-11-22 12:56:28,578 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-22 12:56:28,578 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-22 12:56:28,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:56:28 BoogieIcfgContainer [2020-11-22 12:56:28,597 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:56:28,599 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:56:28,600 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:56:28,600 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:56:28,600 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:56:28" (3/4) ... [2020-11-22 12:56:28,604 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:56:28,619 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-22 12:56:28,620 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-22 12:56:28,620 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 12:56:28,620 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:56:28,679 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ee1d6fad-9e2c-40c0-beeb-dd0d0666a3d6/bin/utaipan/witness.graphml [2020-11-22 12:56:28,679 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:56:28,681 INFO L168 Benchmark]: Toolchain (without parser) took 1643.27 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 62.9 MB in the beginning and 68.3 MB in the end (delta: -5.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:28,681 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 51.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:56:28,682 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.52 ms. Allocated memory is still 92.3 MB. Free memory was 62.9 MB in the beginning and 68.5 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:28,682 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.76 ms. Allocated memory is still 92.3 MB. Free memory was 68.5 MB in the beginning and 67.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:28,682 INFO L168 Benchmark]: Boogie Preprocessor took 22.96 ms. Allocated memory is still 92.3 MB. Free memory was 67.0 MB in the beginning and 65.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:56:28,683 INFO L168 Benchmark]: RCFGBuilder took 594.86 ms. Allocated memory is still 92.3 MB. Free memory was 65.7 MB in the beginning and 49.3 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:28,684 INFO L168 Benchmark]: TraceAbstraction took 591.14 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 49.0 MB in the beginning and 70.8 MB in the end (delta: -21.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:56:28,691 INFO L168 Benchmark]: Witness Printer took 79.60 ms. Allocated memory is still 111.1 MB. Free memory was 70.8 MB in the beginning and 68.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:28,693 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 51.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 308.52 ms. Allocated memory is still 92.3 MB. Free memory was 62.9 MB in the beginning and 68.5 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.76 ms. Allocated memory is still 92.3 MB. Free memory was 68.5 MB in the beginning and 67.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.96 ms. Allocated memory is still 92.3 MB. Free memory was 67.0 MB in the beginning and 65.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 594.86 ms. Allocated memory is still 92.3 MB. Free memory was 65.7 MB in the beginning and 49.3 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 591.14 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 49.0 MB in the beginning and 70.8 MB in the end (delta: -21.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 79.60 ms. Allocated memory is still 111.1 MB. Free memory was 70.8 MB in the beginning and 68.3 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: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() 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, 8 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.4s, 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=8occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 18 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...