./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 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-regression/alias_of_return.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06301ba1d9ec863b6cc8897b223f4a327ace47ed .................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:08:31,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:08:31,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:08:31,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:08:31,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:08:31,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:08:31,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:08:31,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:08:31,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:08:31,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:08:31,496 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:08:31,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:08:31,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:08:31,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:08:31,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:08:31,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:08:31,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:08:31,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:08:31,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:08:31,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:08:31,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:08:31,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:08:31,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:08:31,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:08:31,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:08:31,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:08:31,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:08:31,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:08:31,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:08:31,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:08:31,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:08:31,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:08:31,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:08:31,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:08:31,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:08:31,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:08:31,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:08:31,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:08:31,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:08:31,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:08:31,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:08:31,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 02:08:31,588 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:08:31,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:08:31,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:08:31,590 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:08:31,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:08:31,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:08:31,592 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:08:31,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:08:31,592 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:08:31,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 02:08:31,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:08:31,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:08:31,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:08:31,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:08:31,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:08:31,594 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:08:31,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:08:31,594 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:08:31,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:08:31,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:08:31,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:08:31,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:08:31,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:08:31,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:08:31,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:08:31,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:08:31,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 02:08:31,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 02:08:31,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:08:31,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:08:31,596 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06301ba1d9ec863b6cc8897b223f4a327ace47ed [2021-08-26 02:08:31,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:08:31,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:08:31,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:08:31,970 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:08:31,970 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:08:31,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/alias_of_return.i [2021-08-26 02:08:32,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/135533106/6ad507345a014472b3ecda3a9249c715/FLAG87119cd32 [2021-08-26 02:08:32,368 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:08:32,368 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/alias_of_return.i [2021-08-26 02:08:32,373 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/135533106/6ad507345a014472b3ecda3a9249c715/FLAG87119cd32 [2021-08-26 02:08:32,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/135533106/6ad507345a014472b3ecda3a9249c715 [2021-08-26 02:08:32,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:08:32,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:08:32,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:08:32,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:08:32,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:08:32,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:08:32" (1/1) ... [2021-08-26 02:08:32,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba6c2c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:32, skipping insertion in model container [2021-08-26 02:08:32,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:08:32" (1/1) ... [2021-08-26 02:08:32,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:08:32,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:08:32,885 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/alias_of_return.i[288,301] [2021-08-26 02:08:32,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:08:32,902 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:08:32,912 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/alias_of_return.i[288,301] [2021-08-26 02:08:32,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:08:32,925 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:08:32,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:32 WrapperNode [2021-08-26 02:08:32,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:08:32,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:08:32,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:08:32,927 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:08:32,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:32" (1/1) ... [2021-08-26 02:08:32,937 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:32" (1/1) ... [2021-08-26 02:08:32,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:08:32,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:08:32,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:08:32,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:08:32,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:32" (1/1) ... [2021-08-26 02:08:32,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:32" (1/1) ... [2021-08-26 02:08:32,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:32" (1/1) ... [2021-08-26 02:08:32,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:32" (1/1) ... [2021-08-26 02:08:32,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:32" (1/1) ... [2021-08-26 02:08:32,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:32" (1/1) ... [2021-08-26 02:08:32,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:32" (1/1) ... [2021-08-26 02:08:32,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:08:32,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:08:32,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:08:32,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:08:32,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:32" (1/1) ... [2021-08-26 02:08:33,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:08:33,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:08:33,026 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 02:08:33,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 02:08:33,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 02:08:33,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:08:33,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 02:08:33,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:08:33,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:08:33,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 02:08:33,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:08:33,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:08:33,219 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-26 02:08:33,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:08:33 BoogieIcfgContainer [2021-08-26 02:08:33,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:08:33,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:08:33,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:08:33,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:08:33,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:08:32" (1/3) ... [2021-08-26 02:08:33,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d732780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:08:33, skipping insertion in model container [2021-08-26 02:08:33,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:32" (2/3) ... [2021-08-26 02:08:33,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d732780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:08:33, skipping insertion in model container [2021-08-26 02:08:33,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:08:33" (3/3) ... [2021-08-26 02:08:33,227 INFO L111 eAbstractionObserver]: Analyzing ICFG alias_of_return.i [2021-08-26 02:08:33,231 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:08:33,232 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 02:08:33,266 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:08:33,272 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 02:08:33,272 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 02:08:33,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:08:33,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-26 02:08:33,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:08:33,286 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-26 02:08:33,287 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:08:33,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:08:33,291 INFO L82 PathProgramCache]: Analyzing trace with hash 28692803, now seen corresponding path program 1 times [2021-08-26 02:08:33,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:08:33,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666998101] [2021-08-26 02:08:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:08:33,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:08:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:08:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:08:33,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:08:33,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666998101] [2021-08-26 02:08:33,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666998101] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:08:33,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:08:33,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 02:08:33,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933931262] [2021-08-26 02:08:33,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:08:33,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:08:33,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:08:33,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:08:33,624 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:08:33,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:08:33,700 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2021-08-26 02:08:33,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:08:33,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-08-26 02:08:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:08:33,706 INFO L225 Difference]: With dead ends: 14 [2021-08-26 02:08:33,707 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 02:08:33,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:08:33,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 02:08:33,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 02:08:33,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:08:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 02:08:33,727 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2021-08-26 02:08:33,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:08:33,728 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 02:08:33,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:08:33,728 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 02:08:33,729 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 02:08:33,731 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:08:33,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 02:08:33,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 02:08:33,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 02:08:33,765 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 02:08:33,765 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 02:08:33,765 INFO L857 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2021-08-26 02:08:33,765 INFO L857 garLoopResultBuilder]: For program point L31-1(line 31) no Hoare annotation was computed. [2021-08-26 02:08:33,766 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 02:08:33,766 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 02:08:33,766 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2021-08-26 02:08:33,766 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 32) no Hoare annotation was computed. [2021-08-26 02:08:33,767 INFO L853 garLoopResultBuilder]: At program point L15(lines 13 16) the Hoare annotation is: (and (= |ULTIMATE.start_return_self_#res.base| |ULTIMATE.start_main_~#a~0.base|) (= |ULTIMATE.start_main_~#a~0.offset| |ULTIMATE.start_return_self_#res.offset|)) [2021-08-26 02:08:33,767 INFO L857 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2021-08-26 02:08:33,770 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 02:08:33,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:08:33 BoogieIcfgContainer [2021-08-26 02:08:33,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 02:08:33,787 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 02:08:33,788 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 02:08:33,788 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 02:08:33,789 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:08:33" (3/4) ... [2021-08-26 02:08:33,792 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 02:08:33,800 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-26 02:08:33,801 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 02:08:33,801 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-26 02:08:33,801 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 02:08:33,822 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: \result == a && a == \result [2021-08-26 02:08:33,840 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 02:08:33,840 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 02:08:33,842 INFO L168 Benchmark]: Toolchain (without parser) took 1066.79 ms. Allocated memory is still 62.9 MB. Free memory was 43.7 MB in the beginning and 25.2 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-08-26 02:08:33,842 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 62.9 MB. Free memory was 43.8 MB in the beginning and 43.8 MB in the end (delta: 40.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:08:33,843 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.15 ms. Allocated memory is still 62.9 MB. Free memory was 43.5 MB in the beginning and 34.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 02:08:33,844 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.52 ms. Allocated memory is still 62.9 MB. Free memory was 34.3 MB in the beginning and 32.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:08:33,844 INFO L168 Benchmark]: Boogie Preprocessor took 47.32 ms. Allocated memory is still 62.9 MB. Free memory was 32.9 MB in the beginning and 46.4 MB in the end (delta: -13.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:08:33,845 INFO L168 Benchmark]: RCFGBuilder took 222.23 ms. Allocated memory is still 62.9 MB. Free memory was 46.2 MB in the beginning and 34.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 02:08:33,845 INFO L168 Benchmark]: TraceAbstraction took 561.65 ms. Allocated memory is still 62.9 MB. Free memory was 34.1 MB in the beginning and 27.8 MB in the end (delta: 6.3 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-08-26 02:08:33,846 INFO L168 Benchmark]: Witness Printer took 52.96 ms. Allocated memory is still 62.9 MB. Free memory was 27.8 MB in the beginning and 25.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:08:33,851 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 62.9 MB. Free memory was 43.8 MB in the beginning and 43.8 MB in the end (delta: 40.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 150.15 ms. Allocated memory is still 62.9 MB. Free memory was 43.5 MB in the beginning and 34.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 23.52 ms. Allocated memory is still 62.9 MB. Free memory was 34.3 MB in the beginning and 32.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.32 ms. Allocated memory is still 62.9 MB. Free memory was 32.9 MB in the beginning and 46.4 MB in the end (delta: -13.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 222.23 ms. Allocated memory is still 62.9 MB. Free memory was 46.2 MB in the beginning and 34.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 561.65 ms. Allocated memory is still 62.9 MB. Free memory was 34.1 MB in the beginning and 27.8 MB in the end (delta: 6.3 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Witness Printer took 52.96 ms. Allocated memory is still 62.9 MB. Free memory was 27.8 MB in the beginning and 25.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 10]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 505.2ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 6.7ms, AutomataDifference: 115.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 32.4ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4 SDtfs, 1 SDslu, 6 SDs, 0 SdLazy, 7 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 1 NumberOfFragments, 7 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 16.7ms HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 10.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 15.0ms SsaConstructionTime, 38.1ms SatisfiabilityAnalysisTime, 164.0ms InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 12 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: \result == a && a == \result RESULT: Ultimate proved your program to be correct! [2021-08-26 02:08:33,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...