./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted/Ackermann-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-crafted/Ackermann-1.c -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 5917ee93972738bd406398210804e4342159e8a8 ...................................................................................................................................................................................................................................................................... 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-dev-20ed64e [2021-08-27 10:41:07,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 10:41:07,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 10:41:07,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 10:41:07,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 10:41:07,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 10:41:07,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 10:41:07,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 10:41:07,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 10:41:07,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 10:41:07,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 10:41:07,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 10:41:07,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 10:41:07,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 10:41:07,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 10:41:07,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 10:41:07,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 10:41:08,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 10:41:08,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 10:41:08,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 10:41:08,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 10:41:08,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 10:41:08,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 10:41:08,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 10:41:08,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 10:41:08,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 10:41:08,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 10:41:08,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 10:41:08,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 10:41:08,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 10:41:08,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 10:41:08,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 10:41:08,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 10:41:08,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 10:41:08,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 10:41:08,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 10:41:08,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 10:41:08,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 10:41:08,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 10:41:08,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 10:41:08,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 10:41:08,025 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-08-27 10:41:08,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 10:41:08,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 10:41:08,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 10:41:08,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 10:41:08,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 10:41:08,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 10:41:08,068 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 10:41:08,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 10:41:08,068 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 10:41:08,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 10:41:08,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 10:41:08,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-27 10:41:08,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 10:41:08,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-27 10:41:08,070 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-08-27 10:41:08,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 10:41:08,070 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 10:41:08,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-27 10:41:08,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 10:41:08,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 10:41:08,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 10:41:08,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 10:41:08,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 10:41:08,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 10:41:08,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-27 10:41:08,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 10:41:08,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 10:41:08,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-27 10:41:08,073 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 10:41:08,073 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5917ee93972738bd406398210804e4342159e8a8 [2021-08-27 10:41:08,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 10:41:08,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 10:41:08,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 10:41:08,444 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 10:41:08,445 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 10:41:08,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/Ackermann-1.c [2021-08-27 10:41:08,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c032cec69/35e1552b11744f0c8d606a80dae530c1/FLAG113015ab5 [2021-08-27 10:41:08,950 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 10:41:08,950 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/Ackermann-1.c [2021-08-27 10:41:08,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c032cec69/35e1552b11744f0c8d606a80dae530c1/FLAG113015ab5 [2021-08-27 10:41:09,352 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c032cec69/35e1552b11744f0c8d606a80dae530c1 [2021-08-27 10:41:09,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 10:41:09,360 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 10:41:09,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 10:41:09,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 10:41:09,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 10:41:09,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 10:41:09" (1/1) ... [2021-08-27 10:41:09,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f03dedf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:09, skipping insertion in model container [2021-08-27 10:41:09,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 10:41:09" (1/1) ... [2021-08-27 10:41:09,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 10:41:09,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 10:41:09,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 10:41:09,516 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 10:41:09,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 10:41:09,538 INFO L208 MainTranslator]: Completed translation [2021-08-27 10:41:09,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:09 WrapperNode [2021-08-27 10:41:09,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 10:41:09,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 10:41:09,540 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 10:41:09,540 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 10:41:09,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:09" (1/1) ... [2021-08-27 10:41:09,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:09" (1/1) ... [2021-08-27 10:41:09,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 10:41:09,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 10:41:09,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 10:41:09,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 10:41:09,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:09" (1/1) ... [2021-08-27 10:41:09,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:09" (1/1) ... [2021-08-27 10:41:09,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:09" (1/1) ... [2021-08-27 10:41:09,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:09" (1/1) ... [2021-08-27 10:41:09,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:09" (1/1) ... [2021-08-27 10:41:09,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:09" (1/1) ... [2021-08-27 10:41:09,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:09" (1/1) ... [2021-08-27 10:41:09,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 10:41:09,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 10:41:09,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 10:41:09,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 10:41:09,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:09" (1/1) ... [2021-08-27 10:41:09,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 10:41:09,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 10:41:09,643 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) [2021-08-27 10:41:09,651 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 [2021-08-27 10:41:09,678 INFO L130 BoogieDeclarations]: Found specification of procedure Ack [2021-08-27 10:41:09,679 INFO L138 BoogieDeclarations]: Found implementation of procedure Ack [2021-08-27 10:41:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 10:41:09,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 10:41:09,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 10:41:09,928 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-27 10:41:09,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 10:41:09 BoogieIcfgContainer [2021-08-27 10:41:09,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 10:41:09,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 10:41:09,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 10:41:09,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 10:41:09,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 10:41:09" (1/3) ... [2021-08-27 10:41:09,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d171b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 10:41:09, skipping insertion in model container [2021-08-27 10:41:09,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:09" (2/3) ... [2021-08-27 10:41:09,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d171b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 10:41:09, skipping insertion in model container [2021-08-27 10:41:09,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 10:41:09" (3/3) ... [2021-08-27 10:41:09,947 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann-1.c [2021-08-27 10:41:09,951 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 10:41:09,951 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-08-27 10:41:10,013 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 10:41:10,022 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 [2021-08-27 10:41:10,022 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-08-27 10:41:10,037 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.55) internal successors, (31), 28 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 10:41:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-27 10:41:10,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 10:41:10,040 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-27 10:41:10,041 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-08-27 10:41:10,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 10:41:10,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1868849109, now seen corresponding path program 1 times [2021-08-27 10:41:10,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 10:41:10,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233184943] [2021-08-27 10:41:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 10:41:10,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 10:41:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 10:41:10,147 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 10:41:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 10:41:10,176 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 10:41:10,178 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 10:41:10,179 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 10:41:10,185 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 10:41:10,186 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 10:41:10,186 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 10:41:10,186 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr4ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 10:41:10,187 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr5ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 10:41:10,187 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr6ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 10:41:10,188 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 10:41:10,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 10:41:10,200 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 10:41:10,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 10:41:10 BoogieIcfgContainer [2021-08-27 10:41:10,216 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 10:41:10,220 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 10:41:10,220 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 10:41:10,220 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 10:41:10,222 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 10:41:09" (3/4) ... [2021-08-27 10:41:10,223 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-27 10:41:10,251 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 10:41:10,251 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 10:41:10,253 INFO L168 Benchmark]: Toolchain (without parser) took 892.31 ms. Allocated memory is still 69.2 MB. Free memory was 49.8 MB in the beginning and 45.7 MB in the end (delta: 4.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 10:41:10,254 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 69.2 MB. Free memory was 50.2 MB in the beginning and 50.1 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 10:41:10,254 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.13 ms. Allocated memory is still 69.2 MB. Free memory was 49.6 MB in the beginning and 41.1 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 10:41:10,255 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.73 ms. Allocated memory is still 69.2 MB. Free memory was 40.9 MB in the beginning and 39.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 10:41:10,255 INFO L168 Benchmark]: Boogie Preprocessor took 24.96 ms. Allocated memory is still 69.2 MB. Free memory was 39.7 MB in the beginning and 38.8 MB in the end (delta: 878.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 10:41:10,256 INFO L168 Benchmark]: RCFGBuilder took 337.77 ms. Allocated memory is still 69.2 MB. Free memory was 38.8 MB in the beginning and 41.0 MB in the end (delta: -2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 10:41:10,256 INFO L168 Benchmark]: TraceAbstraction took 285.47 ms. Allocated memory is still 69.2 MB. Free memory was 40.5 MB in the beginning and 47.0 MB in the end (delta: -6.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 10:41:10,256 INFO L168 Benchmark]: Witness Printer took 31.68 ms. Allocated memory is still 69.2 MB. Free memory was 47.0 MB in the beginning and 45.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 10:41:10,259 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 69.2 MB. Free memory was 50.2 MB in the beginning and 50.1 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 176.13 ms. Allocated memory is still 69.2 MB. Free memory was 49.6 MB in the beginning and 41.1 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.73 ms. Allocated memory is still 69.2 MB. Free memory was 40.9 MB in the beginning and 39.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.96 ms. Allocated memory is still 69.2 MB. Free memory was 39.7 MB in the beginning and 38.8 MB in the end (delta: 878.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 337.77 ms. Allocated memory is still 69.2 MB. Free memory was 38.8 MB in the beginning and 41.0 MB in the end (delta: -2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 285.47 ms. Allocated memory is still 69.2 MB. Free memory was 40.5 MB in the beginning and 47.0 MB in the end (delta: -6.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 31.68 ms. Allocated memory is still 69.2 MB. Free memory was 47.0 MB in the beginning and 45.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 10]: integer overflow possible integer overflow possible We found a FailurePath: [L16] int x = __VERIFIER_nondet_int(); [L17] int y = __VERIFIER_nondet_int(); [L18] COND FALSE !(x < 0 || y < 0) [L21] CALL Ack(x, y) VAL [\old(m)=0, \old(n)=2147483647] [L10] COND TRUE m == 0 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] [L10] n+1 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] - UnprovableResult [Line: 10]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 12]: 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 2 procedures, 34 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 187.3ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 6.2ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.4ms SsaConstructionTime, 50.6ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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! [2021-08-27 10:41:10,293 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...