./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/signedintegeroverflow-regression/PrefixDecrement.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5fbdf5bf 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/signedintegeroverflow-regression/PrefixDecrement.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 058f2b919df241022a2d1e4bdbdaa26cd8e08c13 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 22:06:39,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 22:06:39,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 22:06:39,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 22:06:39,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 22:06:39,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 22:06:39,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 22:06:39,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 22:06:39,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 22:06:39,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 22:06:39,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 22:06:39,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 22:06:39,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 22:06:39,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 22:06:39,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 22:06:39,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 22:06:39,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 22:06:39,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 22:06:39,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 22:06:39,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 22:06:39,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 22:06:39,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 22:06:39,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 22:06:39,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 22:06:39,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 22:06:39,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 22:06:39,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 22:06:39,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 22:06:39,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 22:06:39,889 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 22:06:39,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 22:06:39,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 22:06:39,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 22:06:39,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 22:06:39,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 22:06:39,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 22:06:39,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 22:06:39,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 22:06:39,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 22:06:39,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 22:06:39,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 22:06:39,895 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-08-30 22:06:39,910 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 22:06:39,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 22:06:39,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 22:06:39,911 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 22:06:39,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 22:06:39,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 22:06:39,912 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 22:06:39,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 22:06:39,913 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 22:06:39,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 22:06:39,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 22:06:39,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-30 22:06:39,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 22:06:39,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-30 22:06:39,914 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-08-30 22:06:39,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-30 22:06:39,914 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 22:06:39,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-30 22:06:39,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 22:06:39,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 22:06:39,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 22:06:39,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 22:06:39,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 22:06:39,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 22:06:39,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-30 22:06:39,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 22:06:39,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 22:06:39,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-30 22:06:39,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 22:06:39,917 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 058f2b919df241022a2d1e4bdbdaa26cd8e08c13 [2021-08-30 22:06:40,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 22:06:40,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 22:06:40,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 22:06:40,179 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 22:06:40,180 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 22:06:40,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/signedintegeroverflow-regression/PrefixDecrement.i [2021-08-30 22:06:40,224 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98330dc62/562a3398d11043d1851cd416c21e2b01/FLAG5810355d2 [2021-08-30 22:06:40,627 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 22:06:40,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/signedintegeroverflow-regression/PrefixDecrement.i [2021-08-30 22:06:40,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98330dc62/562a3398d11043d1851cd416c21e2b01/FLAG5810355d2 [2021-08-30 22:06:40,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98330dc62/562a3398d11043d1851cd416c21e2b01 [2021-08-30 22:06:40,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 22:06:40,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-30 22:06:40,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 22:06:40,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 22:06:40,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 22:06:40,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:06:40" (1/1) ... [2021-08-30 22:06:40,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@daa79d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:40, skipping insertion in model container [2021-08-30 22:06:40,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:06:40" (1/1) ... [2021-08-30 22:06:40,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 22:06:40,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 22:06:40,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 22:06:40,862 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 22:06:40,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 22:06:40,921 INFO L208 MainTranslator]: Completed translation [2021-08-30 22:06:40,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:40 WrapperNode [2021-08-30 22:06:40,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 22:06:40,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-30 22:06:40,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-30 22:06:40,923 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-30 22:06:40,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:40" (1/1) ... [2021-08-30 22:06:40,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:40" (1/1) ... [2021-08-30 22:06:40,956 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-30 22:06:40,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 22:06:40,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 22:06:40,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 22:06:40,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:40" (1/1) ... [2021-08-30 22:06:40,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:40" (1/1) ... [2021-08-30 22:06:40,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:40" (1/1) ... [2021-08-30 22:06:40,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:40" (1/1) ... [2021-08-30 22:06:40,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:40" (1/1) ... [2021-08-30 22:06:40,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:40" (1/1) ... [2021-08-30 22:06:40,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:40" (1/1) ... [2021-08-30 22:06:40,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 22:06:40,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 22:06:40,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 22:06:40,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 22:06:40,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:40" (1/1) ... [2021-08-30 22:06:40,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 22:06:40,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 22:06:41,009 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) [2021-08-30 22:06:41,011 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 [2021-08-30 22:06:41,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 22:06:41,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-30 22:06:41,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 22:06:41,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 22:06:41,128 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 22:06:41,129 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-30 22:06:41,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:06:41 BoogieIcfgContainer [2021-08-30 22:06:41,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 22:06:41,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 22:06:41,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 22:06:41,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 22:06:41,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:06:40" (1/3) ... [2021-08-30 22:06:41,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140a2dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:06:41, skipping insertion in model container [2021-08-30 22:06:41,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:40" (2/3) ... [2021-08-30 22:06:41,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140a2dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:06:41, skipping insertion in model container [2021-08-30 22:06:41,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:06:41" (3/3) ... [2021-08-30 22:06:41,137 INFO L111 eAbstractionObserver]: Analyzing ICFG PrefixDecrement.i [2021-08-30 22:06:41,141 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 22:06:41,141 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-30 22:06:41,183 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 22:06:41,190 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 [2021-08-30 22:06:41,190 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-30 22:06:41,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 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) [2021-08-30 22:06:41,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-08-30 22:06:41,205 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 22:06:41,205 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-08-30 22:06:41,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-30 22:06:41,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 22:06:41,209 INFO L82 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2021-08-30 22:06:41,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 22:06:41,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476041812] [2021-08-30 22:06:41,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 22:06:41,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 22:06:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 22:06:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 22:06:41,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 22:06:41,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476041812] [2021-08-30 22:06:41,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476041812] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 22:06:41,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 22:06:41,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-30 22:06:41,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77787618] [2021-08-30 22:06:41,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-30 22:06:41,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 22:06:41,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-30 22:06:41,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 22:06:41,403 INFO L87 Difference]: Start difference. First operand has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-08-30 22:06:41,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 22:06:41,487 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2021-08-30 22:06:41,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 22:06:41,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2021-08-30 22:06:41,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 22:06:41,494 INFO L225 Difference]: With dead ends: 9 [2021-08-30 22:06:41,508 INFO L226 Difference]: Without dead ends: 5 [2021-08-30 22:06:41,511 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.50ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 22:06:41,513 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.00ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.53ms IncrementalHoareTripleChecker+Time [2021-08-30 22:06:41,514 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 6 Unknown, 0 Unchecked, 1.00ms Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 74.53ms Time] [2021-08-30 22:06:41,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2021-08-30 22:06:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2021-08-30 22:06:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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) [2021-08-30 22:06:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 4 transitions. [2021-08-30 22:06:41,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 4 transitions. Word has length 3 [2021-08-30 22:06:41,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 22:06:41,533 INFO L470 AbstractCegarLoop]: Abstraction has 5 states and 4 transitions. [2021-08-30 22:06:41,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-08-30 22:06:41,534 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 4 transitions. [2021-08-30 22:06:41,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-08-30 22:06:41,534 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 22:06:41,534 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-08-30 22:06:41,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 22:06:41,535 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-30 22:06:41,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 22:06:41,535 INFO L82 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2021-08-30 22:06:41,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 22:06:41,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17680397] [2021-08-30 22:06:41,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 22:06:41,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 22:06:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 22:06:41,545 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 22:06:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 22:06:41,561 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-30 22:06:41,561 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 22:06:41,562 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2021-08-30 22:06:41,564 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2021-08-30 22:06:41,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 22:06:41,570 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 22:06:41,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 10:06:41 BoogieIcfgContainer [2021-08-30 22:06:41,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 22:06:41,599 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 22:06:41,600 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 22:06:41,600 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 22:06:41,600 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:06:41" (3/4) ... [2021-08-30 22:06:41,601 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-30 22:06:41,618 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 22:06:41,619 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 22:06:41,619 INFO L158 Benchmark]: Toolchain (without parser) took 962.80ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 27.6MB in the beginning and 47.9MB in the end (delta: -20.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 22:06:41,620 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 50.3MB. Free memory was 32.4MB in the beginning and 32.4MB in the end (delta: 33.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 22:06:41,620 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.52ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 27.5MB in the beginning and 47.2MB in the end (delta: -19.8MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. [2021-08-30 22:06:41,620 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.60ms. Allocated memory is still 67.1MB. Free memory was 47.1MB in the beginning and 45.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 22:06:41,621 INFO L158 Benchmark]: Boogie Preprocessor took 26.12ms. Allocated memory is still 67.1MB. Free memory was 45.6MB in the beginning and 44.6MB in the end (delta: 983.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 22:06:41,621 INFO L158 Benchmark]: RCFGBuilder took 145.94ms. Allocated memory is still 67.1MB. Free memory was 44.6MB in the beginning and 36.1MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-30 22:06:41,622 INFO L158 Benchmark]: TraceAbstraction took 466.29ms. Allocated memory is still 67.1MB. Free memory was 35.7MB in the beginning and 49.7MB in the end (delta: -13.9MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2021-08-30 22:06:41,622 INFO L158 Benchmark]: Witness Printer took 19.19ms. Allocated memory is still 67.1MB. Free memory was 49.3MB in the beginning and 47.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 22:06:41,624 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 50.3MB. Free memory was 32.4MB in the beginning and 32.4MB in the end (delta: 33.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.52ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 27.5MB in the beginning and 47.2MB in the end (delta: -19.8MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.60ms. Allocated memory is still 67.1MB. Free memory was 47.1MB in the beginning and 45.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.12ms. Allocated memory is still 67.1MB. Free memory was 45.6MB in the beginning and 44.6MB in the end (delta: 983.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 145.94ms. Allocated memory is still 67.1MB. Free memory was 44.6MB in the beginning and 36.1MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 466.29ms. Allocated memory is still 67.1MB. Free memory was 35.7MB in the beginning and 49.7MB in the end (delta: -13.9MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * Witness Printer took 19.19ms. Allocated memory is still 67.1MB. Free memory was 49.3MB in the beginning and 47.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 333]: integer overflow possible integer overflow possible We found a FailurePath: [L332] int x = -2147483647 - 1; [L333] --x - UnprovableResult [Line: 333]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 385.88ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 8.66ms, AutomataDifference: 131.75ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 6.11ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 74.53ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 44.81ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 0 mSDtfsCounter, 5 mSolverCounterSat, 1.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.50ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 8.35ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.40ms SsaConstructionTime, 21.36ms SatisfiabilityAnalysisTime, 85.09ms InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 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! [2021-08-30 22:06:41,657 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...