./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/count_up_down-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/loops/count_up_down-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 879dd5fbfc79b275a6e1d55253b97d5658b902e6 ...................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:02:09,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:02:09,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:02:10,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:02:10,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:02:10,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:02:10,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:02:10,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:02:10,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:02:10,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:02:10,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:02:10,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:02:10,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:02:10,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:02:10,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:02:10,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:02:10,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:02:10,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:02:10,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:02:10,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:02:10,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:02:10,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:02:10,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:02:10,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:02:10,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:02:10,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:02:10,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:02:10,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:02:10,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:02:10,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:02:10,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:02:10,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:02:10,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:02:10,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:02:10,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:02:10,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:02:10,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:02:10,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:02:10,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:02:10,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:02:10,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:02:10,076 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:02:10,089 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:02:10,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:02:10,090 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:02:10,090 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:02:10,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:02:10,091 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:02:10,091 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:02:10,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:02:10,092 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:02:10,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:02:10,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:02:10,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:02:10,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:02:10,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:02:10,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:02:10,093 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:02:10,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:02:10,093 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:02:10,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:02:10,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:02:10,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:02:10,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:02:10,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:02:10,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:02:10,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:02:10,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:02:10,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:02:10,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:02:10,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:02:10,095 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:02:10,095 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 879dd5fbfc79b275a6e1d55253b97d5658b902e6 [2021-08-26 03:02:10,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:02:10,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:02:10,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:02:10,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:02:10,366 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:02:10,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/count_up_down-2.c [2021-08-26 03:02:10,442 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4466e1942/74797c82ea354549ac41427841502401/FLAG006930074 [2021-08-26 03:02:10,826 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:02:10,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/count_up_down-2.c [2021-08-26 03:02:10,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4466e1942/74797c82ea354549ac41427841502401/FLAG006930074 [2021-08-26 03:02:10,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4466e1942/74797c82ea354549ac41427841502401 [2021-08-26 03:02:10,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:02:10,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:02:10,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:02:10,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:02:10,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:02:10,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:02:10" (1/1) ... [2021-08-26 03:02:10,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40314ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:10, skipping insertion in model container [2021-08-26 03:02:10,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:02:10" (1/1) ... [2021-08-26 03:02:10,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:02:10,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:02:10,997 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/count_up_down-2.c[327,340] [2021-08-26 03:02:11,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:02:11,017 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:02:11,025 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/count_up_down-2.c[327,340] [2021-08-26 03:02:11,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:02:11,037 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:02:11,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:11 WrapperNode [2021-08-26 03:02:11,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:02:11,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:02:11,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:02:11,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:02:11,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:11" (1/1) ... [2021-08-26 03:02:11,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:11" (1/1) ... [2021-08-26 03:02:11,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:02:11,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:02:11,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:02:11,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:02:11,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:11" (1/1) ... [2021-08-26 03:02:11,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:11" (1/1) ... [2021-08-26 03:02:11,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:11" (1/1) ... [2021-08-26 03:02:11,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:11" (1/1) ... [2021-08-26 03:02:11,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:11" (1/1) ... [2021-08-26 03:02:11,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:11" (1/1) ... [2021-08-26 03:02:11,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:11" (1/1) ... [2021-08-26 03:02:11,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:02:11,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:02:11,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:02:11,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:02:11,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:11" (1/1) ... [2021-08-26 03:02:11,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:02:11,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:11,121 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) [2021-08-26 03:02:11,127 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 [2021-08-26 03:02:11,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:02:11,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:02:11,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:02:11,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:02:11,358 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:02:11,359 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-26 03:02:11,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:02:11 BoogieIcfgContainer [2021-08-26 03:02:11,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:02:11,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:02:11,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:02:11,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:02:11,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:02:10" (1/3) ... [2021-08-26 03:02:11,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1e1de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:02:11, skipping insertion in model container [2021-08-26 03:02:11,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:11" (2/3) ... [2021-08-26 03:02:11,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1e1de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:02:11, skipping insertion in model container [2021-08-26 03:02:11,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:02:11" (3/3) ... [2021-08-26 03:02:11,367 INFO L111 eAbstractionObserver]: Analyzing ICFG count_up_down-2.c [2021-08-26 03:02:11,371 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:02:11,371 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:02:11,407 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:02:11,414 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 [2021-08-26 03:02:11,414 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:02:11,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 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) [2021-08-26 03:02:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 03:02:11,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:11,428 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 03:02:11,429 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:11,433 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-08-26 03:02:11,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:11,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230660595] [2021-08-26 03:02:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:11,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:02:11,532 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 03:02:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:02:11,582 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 03:02:11,584 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 03:02:11,585 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:02:11,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:02:11,591 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:02:11,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:02:11 BoogieIcfgContainer [2021-08-26 03:02:11,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:02:11,608 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:02:11,608 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:02:11,608 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:02:11,609 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:02:11" (3/4) ... [2021-08-26 03:02:11,610 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 03:02:11,640 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:02:11,640 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:02:11,642 INFO L168 Benchmark]: Toolchain (without parser) took 789.63 ms. Allocated memory is still 67.1 MB. Free memory was 47.7 MB in the beginning and 42.9 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-08-26 03:02:11,642 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 67.1 MB. Free memory was 48.2 MB in the beginning and 48.1 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:02:11,643 INFO L168 Benchmark]: CACSL2BoogieTranslator took 185.34 ms. Allocated memory is still 67.1 MB. Free memory was 47.5 MB in the beginning and 38.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 03:02:11,644 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.30 ms. Allocated memory is still 67.1 MB. Free memory was 38.3 MB in the beginning and 50.8 MB in the end (delta: -12.6 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2021-08-26 03:02:11,644 INFO L168 Benchmark]: Boogie Preprocessor took 27.42 ms. Allocated memory is still 67.1 MB. Free memory was 50.8 MB in the beginning and 49.9 MB in the end (delta: 911.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:02:11,646 INFO L168 Benchmark]: RCFGBuilder took 261.08 ms. Allocated memory is still 67.1 MB. Free memory was 49.9 MB in the beginning and 38.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 03:02:11,647 INFO L168 Benchmark]: TraceAbstraction took 243.99 ms. Allocated memory is still 67.1 MB. Free memory was 38.3 MB in the beginning and 44.6 MB in the end (delta: -6.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:02:11,649 INFO L168 Benchmark]: Witness Printer took 33.13 ms. Allocated memory is still 67.1 MB. Free memory was 44.6 MB in the beginning and 42.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:02:11,652 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 67.1 MB. Free memory was 48.2 MB in the beginning and 48.1 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 185.34 ms. Allocated memory is still 67.1 MB. Free memory was 47.5 MB in the beginning and 38.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.30 ms. Allocated memory is still 67.1 MB. Free memory was 38.3 MB in the beginning and 50.8 MB in the end (delta: -12.6 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.42 ms. Allocated memory is still 67.1 MB. Free memory was 50.8 MB in the beginning and 49.9 MB in the end (delta: 911.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 261.08 ms. Allocated memory is still 67.1 MB. Free memory was 49.9 MB in the beginning and 38.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 243.99 ms. Allocated memory is still 67.1 MB. Free memory was 38.3 MB in the beginning and 44.6 MB in the end (delta: -6.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 33.13 ms. Allocated memory is still 67.1 MB. Free memory was 44.6 MB in the beginning and 42.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. 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: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] unsigned int n = __VERIFIER_nondet_uint(); [L16] unsigned int x=n, y=0; [L17] COND FALSE !(x>0) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 184.2ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 5.9ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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: 8.2ms SsaConstructionTime, 39.4ms 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! [2021-08-26 03:02:11,683 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...