./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/id_b3_o2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b3_o2-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 484424e2603cb6f289397755afc3736c2105460d ............................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 22:56:25,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:56:25,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:56:25,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:56:25,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:56:25,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:56:25,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:56:25,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:56:25,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:56:25,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:56:25,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:56:25,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:56:25,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:56:25,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:56:25,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:56:25,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:56:25,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:56:25,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:56:25,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:56:25,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:56:25,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:56:25,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:56:25,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:56:25,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:56:25,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:56:25,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:56:25,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:56:25,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:56:25,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:56:25,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:56:25,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:56:25,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:56:25,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:56:25,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:56:25,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:56:25,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:56:25,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:56:25,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:56:25,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:56:25,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:56:25,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:56:25,861 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf [2020-11-29 22:56:25,897 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:56:25,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:56:25,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:56:25,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:56:25,900 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:56:25,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:56:25,901 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 22:56:25,901 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 22:56:25,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:56:25,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 22:56:25,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:56:25,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 22:56:25,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 22:56:25,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 22:56:25,903 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-29 22:56:25,903 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 22:56:25,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:56:25,904 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:56:25,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 22:56:25,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:56:25,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:56:25,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 22:56:25,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 22:56:25,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:56:25,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:56:25,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 22:56:25,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 22:56:25,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:56:25,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 22:56:25,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 22:56:25,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:56:25,906 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:/tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 484424e2603cb6f289397755afc3736c2105460d [2020-11-29 22:56:26,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:56:26,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:56:26,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:56:26,241 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:56:26,242 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:56:26,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_b3_o2-1.c [2020-11-29 22:56:26,309 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/bin/uautomizer/data/931918902/af4d3e18a85d47a58139b47727fc6477/FLAG454da6d35 [2020-11-29 22:56:26,740 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:56:26,741 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/sv-benchmarks/c/recursive-simple/id_b3_o2-1.c [2020-11-29 22:56:26,753 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/bin/uautomizer/data/931918902/af4d3e18a85d47a58139b47727fc6477/FLAG454da6d35 [2020-11-29 22:56:27,133 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/bin/uautomizer/data/931918902/af4d3e18a85d47a58139b47727fc6477 [2020-11-29 22:56:27,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:56:27,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:56:27,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:56:27,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:56:27,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:56:27,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:56:27" (1/1) ... [2020-11-29 22:56:27,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b5c95e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:56:27, skipping insertion in model container [2020-11-29 22:56:27,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:56:27" (1/1) ... [2020-11-29 22:56:27,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:56:27,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:56:27,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:56:27,325 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:56:27,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:56:27,353 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:56:27,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:56:27 WrapperNode [2020-11-29 22:56:27,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:56:27,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:56:27,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:56:27,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:56:27,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:56:27" (1/1) ... [2020-11-29 22:56:27,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:56:27" (1/1) ... [2020-11-29 22:56:27,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:56:27,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:56:27,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:56:27,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:56:27,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:56:27" (1/1) ... [2020-11-29 22:56:27,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:56:27" (1/1) ... [2020-11-29 22:56:27,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:56:27" (1/1) ... [2020-11-29 22:56:27,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:56:27" (1/1) ... [2020-11-29 22:56:27,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:56:27" (1/1) ... [2020-11-29 22:56:27,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:56:27" (1/1) ... [2020-11-29 22:56:27,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:56:27" (1/1) ... [2020-11-29 22:56:27,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:56:27,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:56:27,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:56:27,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:56:27,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:56:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/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 [2020-11-29 22:56:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:56:27,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:56:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 22:56:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-29 22:56:27,485 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-29 22:56:27,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 22:56:27,738 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:56:27,739 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 22:56:27,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:56:27 BoogieIcfgContainer [2020-11-29 22:56:27,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:56:27,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 22:56:27,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 22:56:27,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 22:56:27,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 10:56:27" (1/3) ... [2020-11-29 22:56:27,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3064c030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:56:27, skipping insertion in model container [2020-11-29 22:56:27,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:56:27" (2/3) ... [2020-11-29 22:56:27,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3064c030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:56:27, skipping insertion in model container [2020-11-29 22:56:27,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:56:27" (3/3) ... [2020-11-29 22:56:27,758 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o2-1.c [2020-11-29 22:56:27,775 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 22:56:27,794 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-29 22:56:27,811 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-29 22:56:27,833 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 22:56:27,834 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 22:56:27,834 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 22:56:27,834 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:56:27,834 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:56:27,834 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 22:56:27,835 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:56:27,835 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 22:56:27,878 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-29 22:56:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 22:56:27,894 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:56:27,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 22:56:27,895 INFO L429 AbstractCegarLoop]: === Iteration 1 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:56:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:27,899 INFO L82 PathProgramCache]: Analyzing trace with hash 890470000, now seen corresponding path program 1 times [2020-11-29 22:56:27,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:27,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305158039] [2020-11-29 22:56:27,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:28,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305158039] [2020-11-29 22:56:28,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:56:28,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 22:56:28,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220855832] [2020-11-29 22:56:28,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:56:28,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:28,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:56:28,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:56:28,102 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-11-29 22:56:28,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:28,201 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-11-29 22:56:28,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:56:28,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-29 22:56:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:56:28,217 INFO L225 Difference]: With dead ends: 28 [2020-11-29 22:56:28,217 INFO L226 Difference]: Without dead ends: 17 [2020-11-29 22:56:28,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:56:28,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-29 22:56:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-29 22:56:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 22:56:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-11-29 22:56:28,253 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 6 [2020-11-29 22:56:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:56:28,254 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-11-29 22:56:28,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:56:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-11-29 22:56:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-29 22:56:28,255 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:56:28,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:56:28,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 22:56:28,255 INFO L429 AbstractCegarLoop]: === Iteration 2 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 22:56:28,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:28,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1834766279, now seen corresponding path program 1 times [2020-11-29 22:56:28,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:28,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860936113] [2020-11-29 22:56:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:28,287 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:28,305 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:28,323 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:28,323 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 22:56:28,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 22:56:28,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 10:56:28 BoogieIcfgContainer [2020-11-29 22:56:28,355 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 22:56:28,356 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:56:28,356 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:56:28,356 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:56:28,357 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:56:27" (3/4) ... [2020-11-29 22:56:28,359 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 22:56:28,385 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_90bb297d-456b-4451-b6ea-7fc6c3d4763a/bin/uautomizer/witness.graphml [2020-11-29 22:56:28,386 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:56:28,387 INFO L168 Benchmark]: Toolchain (without parser) took 1250.20 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 49.1 MB in the beginning and 53.4 MB in the end (delta: -4.3 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:28,388 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory was 61.3 MB in the beginning and 61.3 MB in the end (delta: 26.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:56:28,389 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.05 ms. Allocated memory is still 81.8 MB. Free memory was 49.0 MB in the beginning and 60.3 MB in the end (delta: -11.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:28,389 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.62 ms. Allocated memory is still 81.8 MB. Free memory was 60.3 MB in the beginning and 58.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:56:28,390 INFO L168 Benchmark]: Boogie Preprocessor took 16.70 ms. Allocated memory is still 81.8 MB. Free memory was 58.9 MB in the beginning and 58.0 MB in the end (delta: 915.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:28,390 INFO L168 Benchmark]: RCFGBuilder took 338.26 ms. Allocated memory is still 81.8 MB. Free memory was 57.8 MB in the beginning and 46.1 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:28,391 INFO L168 Benchmark]: TraceAbstraction took 613.11 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 45.7 MB in the beginning and 55.1 MB in the end (delta: -9.4 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:28,392 INFO L168 Benchmark]: Witness Printer took 29.79 ms. Allocated memory is still 98.6 MB. Free memory was 55.1 MB in the beginning and 53.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:56:28,396 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory was 61.3 MB in the beginning and 61.3 MB in the end (delta: 26.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 215.05 ms. Allocated memory is still 81.8 MB. Free memory was 49.0 MB in the beginning and 60.3 MB in the end (delta: -11.3 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.62 ms. Allocated memory is still 81.8 MB. Free memory was 60.3 MB in the beginning and 58.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.70 ms. Allocated memory is still 81.8 MB. Free memory was 58.9 MB in the beginning and 58.0 MB in the end (delta: 915.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 338.26 ms. Allocated memory is still 81.8 MB. Free memory was 57.8 MB in the beginning and 46.1 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 613.11 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 45.7 MB in the beginning and 55.1 MB in the end (delta: -9.4 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Witness Printer took 29.79 ms. Allocated memory is still 98.6 MB. Free memory was 55.1 MB in the beginning and 53.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: integer overflow possible integer overflow possible We found a FailurePath: [L14] int input = __VERIFIER_nondet_int(); [L15] CALL id(input) VAL [\old(x)=-2147483648] [L7] COND FALSE !(x==0) VAL [\old(x)=-2147483648, x=-2147483648] [L8] x-1 VAL [\old(x)=-2147483648, x=-2147483648] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 25 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 31 SDslu, 25 SDs, 0 SdLazy, 19 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 65 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 incorrect! Received shutdown request...