./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted/Cairo_nondet.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/Cairo_nondet.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 de94f0c7b8482738d507216e71ac3b33c5f9a9e3 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 10:41:11,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 10:41:11,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 10:41:11,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 10:41:11,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 10:41:11,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 10:41:11,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 10:41:11,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 10:41:11,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 10:41:11,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 10:41:11,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 10:41:11,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 10:41:11,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 10:41:11,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 10:41:11,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 10:41:11,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 10:41:11,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 10:41:11,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 10:41:11,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 10:41:11,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 10:41:11,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 10:41:11,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 10:41:11,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 10:41:11,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 10:41:11,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 10:41:11,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 10:41:11,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 10:41:11,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 10:41:11,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 10:41:11,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 10:41:11,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 10:41:11,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 10:41:11,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 10:41:11,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 10:41:11,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 10:41:11,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 10:41:11,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 10:41:11,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 10:41:11,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 10:41:11,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 10:41:11,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 10:41:11,470 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-08-27 10:41:11,501 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 10:41:11,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 10:41:11,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 10:41:11,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 10:41:11,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 10:41:11,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 10:41:11,503 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 10:41:11,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 10:41:11,503 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 10:41:11,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 10:41:11,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 10:41:11,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-27 10:41:11,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 10:41:11,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-27 10:41:11,504 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-08-27 10:41:11,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 10:41:11,505 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 10:41:11,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-27 10:41:11,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 10:41:11,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 10:41:11,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 10:41:11,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 10:41:11,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 10:41:11,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 10:41:11,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-27 10:41:11,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 10:41:11,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 10:41:11,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-27 10:41:11,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 10:41:11,507 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de94f0c7b8482738d507216e71ac3b33c5f9a9e3 [2021-08-27 10:41:11,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 10:41:11,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 10:41:11,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 10:41:11,781 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 10:41:11,782 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 10:41:11,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/Cairo_nondet.c [2021-08-27 10:41:11,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/959fe3165/5b5b2759651a4ce5b1b8da944866b6e1/FLAG400f3cd92 [2021-08-27 10:41:12,112 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 10:41:12,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/Cairo_nondet.c [2021-08-27 10:41:12,116 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/959fe3165/5b5b2759651a4ce5b1b8da944866b6e1/FLAG400f3cd92 [2021-08-27 10:41:12,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/959fe3165/5b5b2759651a4ce5b1b8da944866b6e1 [2021-08-27 10:41:12,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 10:41:12,565 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 10:41:12,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 10:41:12,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 10:41:12,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 10:41:12,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 10:41:12" (1/1) ... [2021-08-27 10:41:12,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b31d08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:12, skipping insertion in model container [2021-08-27 10:41:12,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 10:41:12" (1/1) ... [2021-08-27 10:41:12,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 10:41:12,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 10:41:12,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 10:41:12,661 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 10:41:12,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 10:41:12,675 INFO L208 MainTranslator]: Completed translation [2021-08-27 10:41:12,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:12 WrapperNode [2021-08-27 10:41:12,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 10:41:12,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 10:41:12,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 10:41:12,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 10:41:12,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:12" (1/1) ... [2021-08-27 10:41:12,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:12" (1/1) ... [2021-08-27 10:41:12,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 10:41:12,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 10:41:12,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 10:41:12,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 10:41:12,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:12" (1/1) ... [2021-08-27 10:41:12,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:12" (1/1) ... [2021-08-27 10:41:12,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:12" (1/1) ... [2021-08-27 10:41:12,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:12" (1/1) ... [2021-08-27 10:41:12,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:12" (1/1) ... [2021-08-27 10:41:12,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:12" (1/1) ... [2021-08-27 10:41:12,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:12" (1/1) ... [2021-08-27 10:41:12,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 10:41:12,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 10:41:12,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 10:41:12,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 10:41:12,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:12" (1/1) ... [2021-08-27 10:41:12,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 10:41:12,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 10:41:12,727 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 10:41:12,760 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 10:41:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 10:41:12,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 10:41:12,902 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 10:41:12,902 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-27 10:41:12,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 10:41:12 BoogieIcfgContainer [2021-08-27 10:41:12,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 10:41:12,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 10:41:12,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 10:41:12,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 10:41:12,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 10:41:12" (1/3) ... [2021-08-27 10:41:12,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a8888e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 10:41:12, skipping insertion in model container [2021-08-27 10:41:12,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 10:41:12" (2/3) ... [2021-08-27 10:41:12,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a8888e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 10:41:12, skipping insertion in model container [2021-08-27 10:41:12,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 10:41:12" (3/3) ... [2021-08-27 10:41:12,909 INFO L111 eAbstractionObserver]: Analyzing ICFG Cairo_nondet.c [2021-08-27 10:41:12,912 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 10:41:12,912 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-27 10:41:12,939 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 10:41:12,944 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 10:41:12,945 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-27 10:41:12,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 8 states have (on average 1.625) internal successors, (13), 10 states have internal predecessors, (13), 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) [2021-08-27 10:41:12,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-08-27 10:41:12,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 10:41:12,958 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-08-27 10:41:12,958 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 10:41:12,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 10:41:12,963 INFO L82 PathProgramCache]: Analyzing trace with hash 957573, now seen corresponding path program 1 times [2021-08-27 10:41:12,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 10:41:12,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746101410] [2021-08-27 10:41:12,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 10:41:12,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 10:41:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 10:41:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 10:41:13,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 10:41:13,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746101410] [2021-08-27 10:41:13,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746101410] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 10:41:13,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 10:41:13,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-27 10:41:13,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434599496] [2021-08-27 10:41:13,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 10:41:13,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 10:41:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 10:41:13,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 10:41:13,142 INFO L87 Difference]: Start difference. First operand has 11 states, 8 states have (on average 1.625) internal successors, (13), 10 states have internal predecessors, (13), 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 2.0) internal successors, (4), 2 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) [2021-08-27 10:41:13,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 10:41:13,181 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-08-27 10:41:13,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 10:41:13,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) Word has length 4 [2021-08-27 10:41:13,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 10:41:13,197 INFO L225 Difference]: With dead ends: 15 [2021-08-27 10:41:13,197 INFO L226 Difference]: Without dead ends: 6 [2021-08-27 10:41:13,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 10:41:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-08-27 10:41:13,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-08-27 10:41:13,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-08-27 10:41:13,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-08-27 10:41:13,228 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-08-27 10:41:13,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 10:41:13,241 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-08-27 10:41:13,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-08-27 10:41:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-08-27 10:41:13,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-27 10:41:13,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 10:41:13,242 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-27 10:41:13,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 10:41:13,242 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 10:41:13,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 10:41:13,243 INFO L82 PathProgramCache]: Analyzing trace with hash 29684810, now seen corresponding path program 1 times [2021-08-27 10:41:13,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 10:41:13,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944605263] [2021-08-27 10:41:13,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 10:41:13,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 10:41:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 10:41:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 10:41:13,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 10:41:13,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944605263] [2021-08-27 10:41:13,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944605263] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 10:41:13,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 10:41:13,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-27 10:41:13,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41573109] [2021-08-27 10:41:13,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 10:41:13,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 10:41:13,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 10:41:13,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 10:41:13,277 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 10:41:13,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 10:41:13,297 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2021-08-27 10:41:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 10:41:13,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-08-27 10:41:13,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 10:41:13,299 INFO L225 Difference]: With dead ends: 10 [2021-08-27 10:41:13,299 INFO L226 Difference]: Without dead ends: 9 [2021-08-27 10:41:13,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 10:41:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-08-27 10:41:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-08-27 10:41:13,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2021-08-27 10:41:13,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-08-27 10:41:13,304 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-08-27 10:41:13,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 10:41:13,305 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-08-27 10:41:13,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 10:41:13,305 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-08-27 10:41:13,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-27 10:41:13,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 10:41:13,306 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-08-27 10:41:13,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 10:41:13,307 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-08-27 10:41:13,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 10:41:13,308 INFO L82 PathProgramCache]: Analyzing trace with hash -423045501, now seen corresponding path program 1 times [2021-08-27 10:41:13,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 10:41:13,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705958546] [2021-08-27 10:41:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 10:41:13,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 10:41:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 10:41:13,316 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 10:41:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 10:41:13,329 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 10:41:13,329 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 10:41:13,330 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 10:41:13,331 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 10:41:13,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 10:41:13,335 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 10:41:13,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 10:41:13 BoogieIcfgContainer [2021-08-27 10:41:13,346 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 10:41:13,347 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 10:41:13,347 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 10:41:13,347 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 10:41:13,348 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 10:41:12" (3/4) ... [2021-08-27 10:41:13,349 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-27 10:41:13,366 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 10:41:13,367 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 10:41:13,368 INFO L168 Benchmark]: Toolchain (without parser) took 802.95 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.6 MB in the beginning and 47.8 MB in the end (delta: -16.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 10:41:13,368 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 54.5 MB. Free memory was 36.2 MB in the beginning and 36.1 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 10:41:13,369 INFO L168 Benchmark]: CACSL2BoogieTranslator took 110.85 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.5 MB in the beginning and 49.2 MB in the end (delta: -17.8 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2021-08-27 10:41:13,369 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.78 ms. Allocated memory is still 67.1 MB. Free memory was 49.2 MB in the beginning and 47.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 10:41:13,369 INFO L168 Benchmark]: Boogie Preprocessor took 9.63 ms. Allocated memory is still 67.1 MB. Free memory was 47.8 MB in the beginning and 47.1 MB in the end (delta: 681.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 10:41:13,370 INFO L168 Benchmark]: RCFGBuilder took 200.68 ms. Allocated memory is still 67.1 MB. Free memory was 46.9 MB in the beginning and 42.4 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 10:41:13,370 INFO L168 Benchmark]: TraceAbstraction took 441.96 ms. Allocated memory is still 67.1 MB. Free memory was 41.9 MB in the beginning and 49.6 MB in the end (delta: -7.6 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2021-08-27 10:41:13,370 INFO L168 Benchmark]: Witness Printer took 19.69 ms. Allocated memory is still 67.1 MB. Free memory was 49.6 MB in the beginning and 47.8 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 10:41:13,372 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 54.5 MB. Free memory was 36.2 MB in the beginning and 36.1 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 110.85 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.5 MB in the beginning and 49.2 MB in the end (delta: -17.8 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 15.78 ms. Allocated memory is still 67.1 MB. Free memory was 49.2 MB in the beginning and 47.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 9.63 ms. Allocated memory is still 67.1 MB. Free memory was 47.8 MB in the beginning and 47.1 MB in the end (delta: 681.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 200.68 ms. Allocated memory is still 67.1 MB. Free memory was 46.9 MB in the beginning and 42.4 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 441.96 ms. Allocated memory is still 67.1 MB. Free memory was 41.9 MB in the beginning and 49.6 MB in the end (delta: -7.6 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. * Witness Printer took 19.69 ms. Allocated memory is still 67.1 MB. Free memory was 49.6 MB in the beginning and 47.8 MB in the end (delta: 1.7 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: 17]: integer overflow possible integer overflow possible We found a FailurePath: [L13] int x; [L14] x = __VERIFIER_nondet_int() [L15] COND TRUE x > __VERIFIER_nondet_int() [L16] COND TRUE x != 0 [L17] EXPR x - 1 [L17] x = x - 1 [L16] COND TRUE x != 0 [L17] x - 1 - UnprovableResult [Line: 17]: 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, 11 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 395.8ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 6.6ms, AutomataDifference: 92.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6 SDtfs, 7 SDslu, 1 SDs, 0 SdLazy, 20 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 34.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 25.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.7ms SsaConstructionTime, 20.2ms SatisfiabilityAnalysisTime, 110.6ms InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 29 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 10:41:13,398 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...