./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/nec20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8d31f386 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/nec20.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 b24dfa0dd4504b10530e4ddbc9574e106897fa2d ........................................................................................................................................................................................................................................................................................................................................................... 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-wip.dd.multireach-323-8d31f38 [2021-07-05 02:20:28,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-05 02:20:28,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-05 02:20:28,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-05 02:20:28,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-05 02:20:28,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-05 02:20:28,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-05 02:20:28,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-05 02:20:28,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-05 02:20:28,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-05 02:20:28,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-05 02:20:28,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-05 02:20:28,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-05 02:20:28,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-05 02:20:28,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-05 02:20:28,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-05 02:20:28,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-05 02:20:28,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-05 02:20:28,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-05 02:20:28,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-05 02:20:28,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-05 02:20:28,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-05 02:20:28,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-05 02:20:28,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-05 02:20:28,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-05 02:20:28,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-05 02:20:28,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-05 02:20:28,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-05 02:20:28,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-05 02:20:28,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-05 02:20:28,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-05 02:20:28,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-05 02:20:28,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-05 02:20:28,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-05 02:20:28,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-05 02:20:28,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-05 02:20:28,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-05 02:20:28,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-05 02:20:28,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-05 02:20:28,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-05 02:20:28,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-05 02:20:28,313 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-07-05 02:20:28,342 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-05 02:20:28,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-05 02:20:28,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-05 02:20:28,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-05 02:20:28,344 INFO L138 SettingsManager]: * Use SBE=true [2021-07-05 02:20:28,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-05 02:20:28,344 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-05 02:20:28,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-05 02:20:28,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-05 02:20:28,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-05 02:20:28,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-05 02:20:28,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-05 02:20:28,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-05 02:20:28,346 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-05 02:20:28,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-05 02:20:28,346 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-05 02:20:28,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-05 02:20:28,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-05 02:20:28,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-05 02:20:28,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-05 02:20:28,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-05 02:20:28,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-05 02:20:28,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-05 02:20:28,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-05 02:20:28,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-05 02:20:28,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-05 02:20:28,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-05 02:20:28,348 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-05 02:20:28,349 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b24dfa0dd4504b10530e4ddbc9574e106897fa2d [2021-07-05 02:20:28,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-05 02:20:28,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-05 02:20:28,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-05 02:20:28,604 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-05 02:20:28,608 INFO L275 PluginConnector]: CDTParser initialized [2021-07-05 02:20:28,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/nec20.c [2021-07-05 02:20:28,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800d5800d/e46a3420aba540a7b71f6433b03aaae2/FLAG32afe954d [2021-07-05 02:20:29,042 INFO L306 CDTParser]: Found 1 translation units. [2021-07-05 02:20:29,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec20.c [2021-07-05 02:20:29,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800d5800d/e46a3420aba540a7b71f6433b03aaae2/FLAG32afe954d [2021-07-05 02:20:29,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800d5800d/e46a3420aba540a7b71f6433b03aaae2 [2021-07-05 02:20:29,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-05 02:20:29,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-05 02:20:29,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-05 02:20:29,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-05 02:20:29,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-05 02:20:29,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.07 02:20:29" (1/1) ... [2021-07-05 02:20:29,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@466dfec2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 02:20:29, skipping insertion in model container [2021-07-05 02:20:29,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.07 02:20:29" (1/1) ... [2021-07-05 02:20:29,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-05 02:20:29,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-05 02:20:29,180 WARN L224 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/nec20.c[356,369] [2021-07-05 02:20:29,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-05 02:20:29,195 INFO L203 MainTranslator]: Completed pre-run [2021-07-05 02:20:29,202 WARN L224 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/nec20.c[356,369] [2021-07-05 02:20:29,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-05 02:20:29,228 INFO L208 MainTranslator]: Completed translation [2021-07-05 02:20:29,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 02:20:29 WrapperNode [2021-07-05 02:20:29,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-05 02:20:29,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-05 02:20:29,230 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-05 02:20:29,230 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-05 02:20:29,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 02:20:29" (1/1) ... [2021-07-05 02:20:29,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 02:20:29" (1/1) ... [2021-07-05 02:20:29,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-05 02:20:29,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-05 02:20:29,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-05 02:20:29,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-05 02:20:29,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 02:20:29" (1/1) ... [2021-07-05 02:20:29,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 02:20:29" (1/1) ... [2021-07-05 02:20:29,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 02:20:29" (1/1) ... [2021-07-05 02:20:29,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 02:20:29" (1/1) ... [2021-07-05 02:20:29,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 02:20:29" (1/1) ... [2021-07-05 02:20:29,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 02:20:29" (1/1) ... [2021-07-05 02:20:29,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 02:20:29" (1/1) ... [2021-07-05 02:20:29,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-05 02:20:29,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-05 02:20:29,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-05 02:20:29,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-05 02:20:29,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 02:20:29" (1/1) ... [2021-07-05 02:20:29,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-05 02:20:29,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-05 02:20:29,314 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) [2021-07-05 02:20:29,317 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 [2021-07-05 02:20:29,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-05 02:20:29,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-05 02:20:29,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-05 02:20:29,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-05 02:20:29,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-05 02:20:29,547 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-07-05 02:20:29,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 02:20:29 BoogieIcfgContainer [2021-07-05 02:20:29,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-05 02:20:29,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-05 02:20:29,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-05 02:20:29,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-05 02:20:29,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.07 02:20:29" (1/3) ... [2021-07-05 02:20:29,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab81cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.07 02:20:29, skipping insertion in model container [2021-07-05 02:20:29,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 02:20:29" (2/3) ... [2021-07-05 02:20:29,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab81cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.07 02:20:29, skipping insertion in model container [2021-07-05 02:20:29,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 02:20:29" (3/3) ... [2021-07-05 02:20:29,554 INFO L111 eAbstractionObserver]: Analyzing ICFG nec20.c [2021-07-05 02:20:29,559 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-05 02:20:29,559 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-05 02:20:29,595 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-05 02:20:29,602 INFO L329 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, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-05 02:20:29,602 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-05 02:20:29,613 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-07-05 02:20:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-05 02:20:29,616 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 02:20:29,617 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-05 02:20:29,617 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 02:20:29,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 02:20:29,622 INFO L82 PathProgramCache]: Analyzing trace with hash -592064849, now seen corresponding path program 1 times [2021-07-05 02:20:29,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 02:20:29,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610027824] [2021-07-05 02:20:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 02:20:29,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 02:20:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 02:20:29,805 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 02:20:29,807 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 02:20:29,808 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 02:20:29,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 02:20:29,848 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 02:20:29,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-05 02:20:29,873 INFO L142 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-07-05 02:20:29,874 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 02:20:29,874 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 02:20:29,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 02:20:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-05 02:20:29,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 02:20:29,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610027824] [2021-07-05 02:20:29,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610027824] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-05 02:20:29,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-05 02:20:29,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-05 02:20:29,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182151985] [2021-07-05 02:20:29,882 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-05 02:20:29,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 02:20:29,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-05 02:20:29,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-05 02:20:29,919 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-07-05 02:20:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 02:20:29,962 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-07-05 02:20:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-05 02:20:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) Word has length 9 [2021-07-05 02:20:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 02:20:29,969 INFO L225 Difference]: With dead ends: 43 [2021-07-05 02:20:29,969 INFO L226 Difference]: Without dead ends: 18 [2021-07-05 02:20:29,971 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-05 02:20:29,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-05 02:20:29,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-07-05 02:20:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2021-07-05 02:20:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-07-05 02:20:29,992 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-07-05 02:20:29,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 02:20:29,993 INFO L442 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-07-05 02:20:29,993 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-07-05 02:20:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-07-05 02:20:29,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-05 02:20:29,994 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 02:20:29,994 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-05 02:20:29,994 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-05 02:20:29,994 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 02:20:29,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 02:20:29,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1182942513, now seen corresponding path program 1 times [2021-07-05 02:20:29,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 02:20:29,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260728514] [2021-07-05 02:20:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 02:20:29,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 02:20:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 02:20:30,053 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 02:20:30,054 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 02:20:30,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 02:20:30,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 02:20:30,062 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 02:20:30,063 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-07-05 02:20:30,065 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 02:20:30,065 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 02:20:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-05 02:20:30,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 02:20:30,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260728514] [2021-07-05 02:20:30,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260728514] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-05 02:20:30,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-05 02:20:30,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-05 02:20:30,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070472912] [2021-07-05 02:20:30,067 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-05 02:20:30,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 02:20:30,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-05 02:20:30,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-05 02:20:30,068 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-07-05 02:20:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 02:20:30,075 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-07-05 02:20:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-05 02:20:30,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) Word has length 9 [2021-07-05 02:20:30,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 02:20:30,076 INFO L225 Difference]: With dead ends: 18 [2021-07-05 02:20:30,076 INFO L226 Difference]: Without dead ends: 14 [2021-07-05 02:20:30,077 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-05 02:20:30,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-07-05 02:20:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 11. [2021-07-05 02:20:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 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) [2021-07-05 02:20:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-07-05 02:20:30,079 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-07-05 02:20:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 02:20:30,079 INFO L442 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-07-05 02:20:30,080 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2021-07-05 02:20:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-07-05 02:20:30,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-05 02:20:30,080 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 02:20:30,082 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-05 02:20:30,083 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-05 02:20:30,083 INFO L374 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 02:20:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 02:20:30,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1172475752, now seen corresponding path program 1 times [2021-07-05 02:20:30,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 02:20:30,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962272811] [2021-07-05 02:20:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 02:20:30,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 02:20:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-05 02:20:30,097 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-05 02:20:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-05 02:20:30,112 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-05 02:20:30,139 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-05 02:20:30,141 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-05 02:20:30,144 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-05 02:20:30,144 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-05 02:20:30,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.07 02:20:30 BoogieIcfgContainer [2021-07-05 02:20:30,170 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-05 02:20:30,170 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-05 02:20:30,171 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-05 02:20:30,171 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-05 02:20:30,171 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 02:20:29" (3/4) ... [2021-07-05 02:20:30,173 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-07-05 02:20:30,207 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-05 02:20:30,207 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-05 02:20:30,208 INFO L168 Benchmark]: Toolchain (without parser) took 1143.99 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 29.4 MB in the beginning and 37.5 MB in the end (delta: -8.1 MB). Peak memory consumption was 1.3 MB. Max. memory is 16.1 GB. [2021-07-05 02:20:30,208 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 52.4 MB. Free memory was 33.1 MB in the beginning and 33.0 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-05 02:20:30,209 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.17 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 29.1 MB in the beginning and 47.1 MB in the end (delta: -17.9 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2021-07-05 02:20:30,209 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.11 ms. Allocated memory is still 62.9 MB. Free memory was 47.1 MB in the beginning and 45.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-05 02:20:30,209 INFO L168 Benchmark]: Boogie Preprocessor took 13.67 ms. Allocated memory is still 62.9 MB. Free memory was 45.5 MB in the beginning and 44.5 MB in the end (delta: 990.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-05 02:20:30,210 INFO L168 Benchmark]: RCFGBuilder took 260.38 ms. Allocated memory is still 62.9 MB. Free memory was 44.4 MB in the beginning and 45.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. [2021-07-05 02:20:30,210 INFO L168 Benchmark]: TraceAbstraction took 620.15 ms. Allocated memory is still 62.9 MB. Free memory was 44.9 MB in the beginning and 39.5 MB in the end (delta: 5.5 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2021-07-05 02:20:30,210 INFO L168 Benchmark]: Witness Printer took 37.02 ms. Allocated memory is still 62.9 MB. Free memory was 39.5 MB in the beginning and 37.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-05 02:20:30,212 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 52.4 MB. Free memory was 33.1 MB in the beginning and 33.0 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 163.17 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 29.1 MB in the beginning and 47.1 MB in the end (delta: -17.9 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.11 ms. Allocated memory is still 62.9 MB. Free memory was 47.1 MB in the beginning and 45.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 13.67 ms. Allocated memory is still 62.9 MB. Free memory was 45.5 MB in the beginning and 44.5 MB in the end (delta: 990.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 260.38 ms. Allocated memory is still 62.9 MB. Free memory was 44.4 MB in the beginning and 45.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 620.15 ms. Allocated memory is still 62.9 MB. Free memory was 44.9 MB in the beginning and 39.5 MB in the end (delta: 5.5 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Witness Printer took 37.02 ms. Allocated memory is still 62.9 MB. Free memory was 39.5 MB in the beginning and 37.5 MB in the end (delta: 2.0 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: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int b; VAL [b=0] [L15] _Bool k=__VERIFIER_nondet_bool(); [L16] unsigned int i,n,j; [L17] int a[1025]; VAL [b=0] [L19] COND TRUE \read(k) [L20] n=0 VAL [b=0] [L25] i=0 [L26] j=__VERIFIER_nondet_uint() [L27] COND FALSE !(j > 10000) VAL [b=0] [L30] COND TRUE i <= n [L31] i++ [L32] j= j +2 VAL [b=0] [L30] COND FALSE !(i <= n) VAL [b=0] [L35] a[i]=0 [L7] COND TRUE !(cond) VAL [b=0] [L8] reach_error() VAL [b=0] - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 552.9ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 6.6ms, AutomataDifference: 83.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 36 SDtfs, 20 SDslu, 28 SDs, 0 SdLazy, 15 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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: 14.1ms AutomataMinimizationTime, 2 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 12.3ms SsaConstructionTime, 89.5ms SatisfiabilityAnalysisTime, 173.8ms InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 34 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! [2021-07-05 02:20:30,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...