./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/signedintegeroverflow-regression/PostfixDecrement.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/signedintegeroverflow-regression/PostfixDecrement.i -s /tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5098e3d431ffea128b6fb3ac04da30361a618d04 ............................................................................................................................................................................................................................................................................... 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 [2020-11-28 07:25:32,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:25:32,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:25:32,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:25:32,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:25:32,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:25:32,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:25:32,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:25:32,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:25:32,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:25:32,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:25:32,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:25:32,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:25:32,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:25:32,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:25:32,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:25:32,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:25:32,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:25:32,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:25:32,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:25:32,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:25:32,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:25:32,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:25:32,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:25:32,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:25:32,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:25:32,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:25:32,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:25:32,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:25:32,882 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:25:32,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:25:32,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:25:32,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:25:32,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:25:32,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:25:32,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:25:32,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:25:32,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:25:32,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:25:32,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:25:32,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:25:32,895 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-28 07:25:32,942 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:25:32,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:25:32,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:25:32,945 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:25:32,945 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:25:32,945 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:25:32,945 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:25:32,946 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:25:32,946 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:25:32,946 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:25:32,947 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:25:32,948 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:25:32,948 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:25:32,948 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:25:32,949 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:25:32,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:25:32,950 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:25:32,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:25:32,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:25:32,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:25:32,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:25:32,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:25:32,951 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-28 07:25:32,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:25:32,952 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:25:32,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:25:32,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:25:32,952 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:25:32,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:25:32,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:25:32,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:25:32,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:25:32,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:25:32,954 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:25:32,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:25:32,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:25:32,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:25:32,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:25:32,955 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5098e3d431ffea128b6fb3ac04da30361a618d04 [2020-11-28 07:25:33,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:25:33,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:25:33,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:25:33,310 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:25:33,310 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:25:33,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/bin/utaipan/../../sv-benchmarks/c/signedintegeroverflow-regression/PostfixDecrement.i [2020-11-28 07:25:33,374 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/bin/utaipan/data/98ad13d7f/725fdeaba97644ff83db9f987427c079/FLAG6f6e2624c [2020-11-28 07:25:34,024 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:25:34,024 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/sv-benchmarks/c/signedintegeroverflow-regression/PostfixDecrement.i [2020-11-28 07:25:34,040 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/bin/utaipan/data/98ad13d7f/725fdeaba97644ff83db9f987427c079/FLAG6f6e2624c [2020-11-28 07:25:34,326 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/bin/utaipan/data/98ad13d7f/725fdeaba97644ff83db9f987427c079 [2020-11-28 07:25:34,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:25:34,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:25:34,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:25:34,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:25:34,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:25:34,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fcd563f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34, skipping insertion in model container [2020-11-28 07:25:34,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:25:34,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:25:34,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:25:34,699 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:25:34,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:25:34,806 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:25:34,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34 WrapperNode [2020-11-28 07:25:34,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:25:34,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:25:34,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:25:34,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:25:34,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:25:34,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:25:34,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:25:34,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:25:34,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... [2020-11-28 07:25:34,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:25:34,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:25:34,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:25:34,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:25:34,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:25:34,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:25:34,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:25:34,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:25:34,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:25:35,180 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:25:35,180 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-28 07:25:35,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:25:35 BoogieIcfgContainer [2020-11-28 07:25:35,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:25:35,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:25:35,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:25:35,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:25:35,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:25:34" (1/3) ... [2020-11-28 07:25:35,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1336e2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:25:35, skipping insertion in model container [2020-11-28 07:25:35,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:25:34" (2/3) ... [2020-11-28 07:25:35,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1336e2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:25:35, skipping insertion in model container [2020-11-28 07:25:35,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:25:35" (3/3) ... [2020-11-28 07:25:35,191 INFO L111 eAbstractionObserver]: Analyzing ICFG PostfixDecrement.i [2020-11-28 07:25:35,216 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:25:35,220 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 07:25:35,231 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 07:25:35,288 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:25:35,288 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:25:35,288 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:25:35,289 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:25:35,289 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:25:35,289 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:25:35,289 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:25:35,289 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:25:35,303 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-11-28 07:25:35,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2020-11-28 07:25:35,328 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:35,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2020-11-28 07:25:35,329 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:25:35,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:35,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1274, now seen corresponding path program 1 times [2020-11-28 07:25:35,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:35,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740910324] [2020-11-28 07:25:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:25:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:25:35,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740910324] [2020-11-28 07:25:35,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:25:35,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:25:35,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277989869] [2020-11-28 07:25:35,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:25:35,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:35,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:25:35,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:25:35,551 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2020-11-28 07:25:35,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:35,587 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2020-11-28 07:25:35,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:25:35,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2020-11-28 07:25:35,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:35,600 INFO L225 Difference]: With dead ends: 6 [2020-11-28 07:25:35,601 INFO L226 Difference]: Without dead ends: 4 [2020-11-28 07:25:35,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:25:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2020-11-28 07:25:35,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2020-11-28 07:25:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-28 07:25:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 3 transitions. [2020-11-28 07:25:35,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 3 transitions. Word has length 2 [2020-11-28 07:25:35,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:35,643 INFO L481 AbstractCegarLoop]: Abstraction has 4 states and 3 transitions. [2020-11-28 07:25:35,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:25:35,643 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 3 transitions. [2020-11-28 07:25:35,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:25:35,644 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:35,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:25:35,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:25:35,645 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:25:35,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:35,647 INFO L82 PathProgramCache]: Analyzing trace with hash 39530, now seen corresponding path program 1 times [2020-11-28 07:25:35,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:35,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470383373] [2020-11-28 07:25:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:25:35,669 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:25:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:25:35,683 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:25:35,702 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:25:35,703 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:25:35,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:25:35,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:25:35 BoogieIcfgContainer [2020-11-28 07:25:35,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:25:35,726 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:25:35,727 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:25:35,727 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:25:35,727 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:25:35" (3/4) ... [2020-11-28 07:25:35,730 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:25:35,764 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_267a6185-0eff-4f6f-801f-5ee7e8f338f5/bin/utaipan/witness.graphml [2020-11-28 07:25:35,765 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:25:35,767 INFO L168 Benchmark]: Toolchain (without parser) took 1431.20 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 59.2 MB in the beginning and 69.2 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:35,768 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory was 47.2 MB in the beginning and 47.2 MB in the end (delta: 38.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:25:35,769 INFO L168 Benchmark]: CACSL2BoogieTranslator took 470.46 ms. Allocated memory is still 90.2 MB. Free memory was 58.9 MB in the beginning and 58.7 MB in the end (delta: 190.0 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:35,770 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.88 ms. Allocated memory is still 90.2 MB. Free memory was 58.7 MB in the beginning and 57.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:35,770 INFO L168 Benchmark]: Boogie Preprocessor took 19.32 ms. Allocated memory is still 90.2 MB. Free memory was 57.3 MB in the beginning and 56.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:25:35,771 INFO L168 Benchmark]: RCFGBuilder took 316.46 ms. Allocated memory is still 90.2 MB. Free memory was 56.2 MB in the beginning and 44.4 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:35,772 INFO L168 Benchmark]: TraceAbstraction took 542.15 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 43.7 MB in the beginning and 70.7 MB in the end (delta: -27.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:25:35,773 INFO L168 Benchmark]: Witness Printer took 38.44 ms. Allocated memory is still 109.1 MB. Free memory was 70.7 MB in the beginning and 69.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:25:35,777 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory was 47.2 MB in the beginning and 47.2 MB in the end (delta: 38.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 470.46 ms. Allocated memory is still 90.2 MB. Free memory was 58.9 MB in the beginning and 58.7 MB in the end (delta: 190.0 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.88 ms. Allocated memory is still 90.2 MB. Free memory was 58.7 MB in the beginning and 57.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.32 ms. Allocated memory is still 90.2 MB. Free memory was 57.3 MB in the beginning and 56.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 316.46 ms. Allocated memory is still 90.2 MB. Free memory was 56.2 MB in the beginning and 44.4 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 542.15 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 43.7 MB in the beginning and 70.7 MB in the end (delta: -27.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 38.44 ms. Allocated memory is still 109.1 MB. Free memory was 70.7 MB in the beginning and 69.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 333]: integer overflow possible integer overflow possible We found a FailurePath: [L332] int x = -2147483647 - 1; [L333] x-- - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 SDtfs, 2 SDslu, 0 SDs, 0 SdLazy, 2 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 1 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 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...