./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a3f332cc-aa62-484e-9f06-69b9540f6956/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a3f332cc-aa62-484e-9f06-69b9540f6956/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a3f332cc-aa62-484e-9f06-69b9540f6956/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a3f332cc-aa62-484e-9f06-69b9540f6956/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/alias_of_return.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a3f332cc-aa62-484e-9f06-69b9540f6956/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a3f332cc-aa62-484e-9f06-69b9540f6956/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3925884d137f07b09b1c6b8320dffe7629fc0b49 ................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 18:30:12,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:30:12,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:30:12,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:30:12,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:30:12,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:30:12,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:30:12,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:30:12,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:30:12,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:30:12,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:30:12,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:30:12,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:30:12,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:30:12,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:30:12,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:30:12,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:30:12,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:30:12,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:30:12,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:30:12,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:30:12,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:30:12,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:30:12,301 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:30:12,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:30:12,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:30:12,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:30:12,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:30:12,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:30:12,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:30:12,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:30:12,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:30:12,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:30:12,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:30:12,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:30:12,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:30:12,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:30:12,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:30:12,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:30:12,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:30:12,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:30:12,309 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a3f332cc-aa62-484e-9f06-69b9540f6956/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 18:30:12,318 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:30:12,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:30:12,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:30:12,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:30:12,319 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:30:12,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:30:12,320 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:30:12,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:30:12,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:30:12,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:30:12,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 18:30:12,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:30:12,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 18:30:12,320 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:30:12,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:30:12,321 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:30:12,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 18:30:12,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:30:12,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:30:12,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:30:12,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:30:12,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:30:12,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:30:12,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:30:12,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 18:30:12,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:30:12,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 18:30:12,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 18:30:12,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:30:12,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_a3f332cc-aa62-484e-9f06-69b9540f6956/bin/uautomizer 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(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3925884d137f07b09b1c6b8320dffe7629fc0b49 [2019-12-07 18:30:12,422 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:30:12,429 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:30:12,431 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:30:12,432 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:30:12,432 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:30:12,433 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a3f332cc-aa62-484e-9f06-69b9540f6956/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/alias_of_return.i [2019-12-07 18:30:12,468 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a3f332cc-aa62-484e-9f06-69b9540f6956/bin/uautomizer/data/1a27a3b55/0fde28377f7e476889d420c3c7ca60de/FLAG970dc7050 [2019-12-07 18:30:12,856 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:30:12,856 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a3f332cc-aa62-484e-9f06-69b9540f6956/sv-benchmarks/c/ldv-regression/alias_of_return.i [2019-12-07 18:30:12,859 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a3f332cc-aa62-484e-9f06-69b9540f6956/bin/uautomizer/data/1a27a3b55/0fde28377f7e476889d420c3c7ca60de/FLAG970dc7050 [2019-12-07 18:30:12,868 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a3f332cc-aa62-484e-9f06-69b9540f6956/bin/uautomizer/data/1a27a3b55/0fde28377f7e476889d420c3c7ca60de [2019-12-07 18:30:12,869 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:30:12,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:30:12,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:30:12,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:30:12,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:30:12,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:30:12" (1/1) ... [2019-12-07 18:30:12,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ef5444d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:30:12, skipping insertion in model container [2019-12-07 18:30:12,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:30:12" (1/1) ... [2019-12-07 18:30:12,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:30:12,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:30:12,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:30:12,993 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:30:13,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:30:13,050 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:30:13,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:30:13 WrapperNode [2019-12-07 18:30:13,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:30:13,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:30:13,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:30:13,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:30:13,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:30:13" (1/1) ... [2019-12-07 18:30:13,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:30:13" (1/1) ... [2019-12-07 18:30:13,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:30:13,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:30:13,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:30:13,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:30:13,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:30:13" (1/1) ... [2019-12-07 18:30:13,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:30:13" (1/1) ... [2019-12-07 18:30:13,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:30:13" (1/1) ... [2019-12-07 18:30:13,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:30:13" (1/1) ... [2019-12-07 18:30:13,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:30:13" (1/1) ... [2019-12-07 18:30:13,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:30:13" (1/1) ... [2019-12-07 18:30:13,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:30:13" (1/1) ... [2019-12-07 18:30:13,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:30:13,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:30:13,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:30:13,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:30:13,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:30:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a3f332cc-aa62-484e-9f06-69b9540f6956/bin/uautomizer/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 [2019-12-07 18:30:13,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 18:30:13,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:30:13,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:30:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 18:30:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 18:30:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 18:30:13,252 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:30:13,253 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 18:30:13,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:30:13 BoogieIcfgContainer [2019-12-07 18:30:13,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:30:13,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:30:13,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:30:13,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:30:13,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:30:12" (1/3) ... [2019-12-07 18:30:13,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b31fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:30:13, skipping insertion in model container [2019-12-07 18:30:13,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:30:13" (2/3) ... [2019-12-07 18:30:13,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b31fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:30:13, skipping insertion in model container [2019-12-07 18:30:13,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:30:13" (3/3) ... [2019-12-07 18:30:13,261 INFO L109 eAbstractionObserver]: Analyzing ICFG alias_of_return.i [2019-12-07 18:30:13,268 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:30:13,272 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 18:30:13,281 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 18:30:13,296 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:30:13,297 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 18:30:13,297 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:30:13,297 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:30:13,297 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:30:13,297 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:30:13,297 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:30:13,297 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:30:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-12-07 18:30:13,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 18:30:13,310 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:30:13,311 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 18:30:13,311 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:30:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:30:13,315 INFO L82 PathProgramCache]: Analyzing trace with hash 28692803, now seen corresponding path program 1 times [2019-12-07 18:30:13,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:30:13,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804414976] [2019-12-07 18:30:13,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:30:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:30:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:30:13,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804414976] [2019-12-07 18:30:13,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:30:13,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 18:30:13,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503459400] [2019-12-07 18:30:13,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:30:13,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:30:13,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:30:13,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:30:13,444 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2019-12-07 18:30:13,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:30:13,479 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2019-12-07 18:30:13,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:30:13,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-12-07 18:30:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:30:13,484 INFO L225 Difference]: With dead ends: 14 [2019-12-07 18:30:13,485 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 18:30:13,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:30:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 18:30:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 18:30:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 18:30:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 18:30:13,503 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2019-12-07 18:30:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:30:13,503 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 18:30:13,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:30:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 18:30:13,503 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 18:30:13,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 18:30:13,516 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 18:30:13,516 INFO L246 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2019-12-07 18:30:13,517 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 18:30:13,517 INFO L246 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2019-12-07 18:30:13,517 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 18:30:13,517 INFO L246 CegarLoopResult]: For program point L29-1(line 29) no Hoare annotation was computed. [2019-12-07 18:30:13,517 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2019-12-07 18:30:13,517 INFO L246 CegarLoopResult]: For program point L16(lines 16 30) no Hoare annotation was computed. [2019-12-07 18:30:13,518 INFO L242 CegarLoopResult]: At program point L13(lines 11 14) the Hoare annotation is: (and (= |ULTIMATE.start_main_~#a~0.offset| |ULTIMATE.start_return_self_#res.offset|) (= |ULTIMATE.start_return_self_#res.base| |ULTIMATE.start_main_~#a~0.base|)) [2019-12-07 18:30:13,518 INFO L246 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2019-12-07 18:30:13,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:30:13 BoogieIcfgContainer [2019-12-07 18:30:13,532 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:30:13,532 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:30:13,532 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:30:13,532 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:30:13,533 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:30:13" (3/4) ... [2019-12-07 18:30:13,535 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 18:30:13,542 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-12-07 18:30:13,542 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 18:30:13,542 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 18:30:13,559 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: a == \result && \result == a [2019-12-07 18:30:13,568 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a3f332cc-aa62-484e-9f06-69b9540f6956/bin/uautomizer/witness.graphml [2019-12-07 18:30:13,568 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:30:13,569 INFO L168 Benchmark]: Toolchain (without parser) took 698.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -122.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 11.5 GB. [2019-12-07 18:30:13,570 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:30:13,570 INFO L168 Benchmark]: CACSL2BoogieTranslator took 179.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -176.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 18:30:13,571 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.27 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:30:13,571 INFO L168 Benchmark]: Boogie Preprocessor took 12.39 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:30:13,571 INFO L168 Benchmark]: RCFGBuilder took 167.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 11.5 GB. [2019-12-07 18:30:13,572 INFO L168 Benchmark]: TraceAbstraction took 277.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 11.5 GB. [2019-12-07 18:30:13,572 INFO L168 Benchmark]: Witness Printer took 35.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:30:13,574 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 179.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -176.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.27 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.39 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 167.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 277.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 11.5 GB. * Witness Printer took 35.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 11]: Loop Invariant Derived loop invariant: a == \result && \result == a - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Result: SAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 4 SDtfs, 1 SDslu, 6 SDs, 0 SdLazy, 7 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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, 7 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, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...