./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/phases_2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/loop-acceleration/phases_2-1.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 40774f15dea268138f2179cc2f832c9729515e75ef9c65e50e7b347c749bb02c --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 15:00:16,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 15:00:16,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 15:00:16,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 15:00:16,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 15:00:16,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 15:00:16,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 15:00:16,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 15:00:16,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 15:00:16,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 15:00:16,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 15:00:16,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 15:00:16,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 15:00:16,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 15:00:16,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 15:00:16,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 15:00:16,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 15:00:16,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 15:00:16,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 15:00:16,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 15:00:16,326 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 15:00:16,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 15:00:16,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 15:00:16,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 15:00:16,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 15:00:16,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 15:00:16,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 15:00:16,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 15:00:16,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 15:00:16,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 15:00:16,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 15:00:16,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 15:00:16,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 15:00:16,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 15:00:16,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 15:00:16,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 15:00:16,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 15:00:16,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 15:00:16,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 15:00:16,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 15:00:16,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 15:00:16,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 15:00:16,338 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 15:00:16,354 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 15:00:16,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 15:00:16,354 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 15:00:16,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 15:00:16,355 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 15:00:16,355 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 15:00:16,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 15:00:16,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 15:00:16,356 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 15:00:16,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 15:00:16,356 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 15:00:16,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 15:00:16,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 15:00:16,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 15:00:16,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 15:00:16,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 15:00:16,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 15:00:16,357 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 15:00:16,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 15:00:16,357 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 15:00:16,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 15:00:16,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 15:00:16,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 15:00:16,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 15:00:16,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:00:16,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 15:00:16,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 15:00:16,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 15:00:16,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 15:00:16,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 15:00:16,359 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 15:00:16,359 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 15:00:16,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 15:00:16,360 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40774f15dea268138f2179cc2f832c9729515e75ef9c65e50e7b347c749bb02c [2022-07-19 15:00:16,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 15:00:16,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 15:00:16,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 15:00:16,581 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 15:00:16,596 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 15:00:16,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/phases_2-1.c [2022-07-19 15:00:16,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/754406b84/face0ecdc371485e8e253a0ceee41a5d/FLAG18d22f746 [2022-07-19 15:00:16,962 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 15:00:16,963 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_2-1.c [2022-07-19 15:00:16,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/754406b84/face0ecdc371485e8e253a0ceee41a5d/FLAG18d22f746 [2022-07-19 15:00:17,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/754406b84/face0ecdc371485e8e253a0ceee41a5d [2022-07-19 15:00:17,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 15:00:17,406 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 15:00:17,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 15:00:17,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 15:00:17,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 15:00:17,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:00:17" (1/1) ... [2022-07-19 15:00:17,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ceac130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:00:17, skipping insertion in model container [2022-07-19 15:00:17,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:00:17" (1/1) ... [2022-07-19 15:00:17,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 15:00:17,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 15:00:17,547 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_2-1.c[459,472] [2022-07-19 15:00:17,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:00:17,565 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 15:00:17,580 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_2-1.c[459,472] [2022-07-19 15:00:17,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:00:17,597 INFO L208 MainTranslator]: Completed translation [2022-07-19 15:00:17,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:00:17 WrapperNode [2022-07-19 15:00:17,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 15:00:17,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 15:00:17,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 15:00:17,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 15:00:17,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:00:17" (1/1) ... [2022-07-19 15:00:17,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:00:17" (1/1) ... [2022-07-19 15:00:17,619 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-07-19 15:00:17,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 15:00:17,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 15:00:17,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 15:00:17,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 15:00:17,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:00:17" (1/1) ... [2022-07-19 15:00:17,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:00:17" (1/1) ... [2022-07-19 15:00:17,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:00:17" (1/1) ... [2022-07-19 15:00:17,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:00:17" (1/1) ... [2022-07-19 15:00:17,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:00:17" (1/1) ... [2022-07-19 15:00:17,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:00:17" (1/1) ... [2022-07-19 15:00:17,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:00:17" (1/1) ... [2022-07-19 15:00:17,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 15:00:17,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 15:00:17,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 15:00:17,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 15:00:17,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:00:17" (1/1) ... [2022-07-19 15:00:17,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:00:17,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:00:17,666 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) [2022-07-19 15:00:17,681 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 [2022-07-19 15:00:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 15:00:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 15:00:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 15:00:17,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 15:00:17,730 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 15:00:17,732 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 15:00:17,805 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 15:00:17,808 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 15:00:17,808 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 15:00:17,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:00:17 BoogieIcfgContainer [2022-07-19 15:00:17,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 15:00:17,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 15:00:17,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 15:00:17,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 15:00:17,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 03:00:17" (1/3) ... [2022-07-19 15:00:17,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de458d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:00:17, skipping insertion in model container [2022-07-19 15:00:17,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:00:17" (2/3) ... [2022-07-19 15:00:17,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de458d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:00:17, skipping insertion in model container [2022-07-19 15:00:17,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:00:17" (3/3) ... [2022-07-19 15:00:17,820 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_2-1.c [2022-07-19 15:00:17,829 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 15:00:17,831 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 15:00:17,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 15:00:17,867 INFO L357 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, mAutomataTypeConcurrency=PETRI_NET, 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7da217dc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@18d41fb0 [2022-07-19 15:00:17,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 15:00:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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) [2022-07-19 15:00:17,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-19 15:00:17,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:00:17,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:00:17,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:00:17,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:00:17,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1807274184, now seen corresponding path program 1 times [2022-07-19 15:00:17,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:00:17,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522322477] [2022-07-19 15:00:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:00:17,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:00:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:00:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:00:17,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:00:17,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522322477] [2022-07-19 15:00:17,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522322477] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:00:17,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:00:17,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 15:00:17,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371329212] [2022-07-19 15:00:17,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:00:17,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 15:00:17,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:00:17,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 15:00:17,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:00:17,993 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-19 15:00:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:00:18,002 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-07-19 15:00:18,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 15:00:18,004 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-07-19 15:00:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:00:18,009 INFO L225 Difference]: With dead ends: 21 [2022-07-19 15:00:18,009 INFO L226 Difference]: Without dead ends: 9 [2022-07-19 15:00:18,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:00:18,017 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:00:18,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:00:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-19 15:00:18,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-07-19 15:00:18,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-07-19 15:00:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-07-19 15:00:18,077 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2022-07-19 15:00:18,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:00:18,077 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-07-19 15:00:18,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-19 15:00:18,078 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-07-19 15:00:18,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-19 15:00:18,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:00:18,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:00:18,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 15:00:18,080 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:00:18,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:00:18,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1806976274, now seen corresponding path program 1 times [2022-07-19 15:00:18,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:00:18,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884343489] [2022-07-19 15:00:18,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:00:18,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:00:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 15:00:18,115 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 15:00:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 15:00:18,149 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 15:00:18,150 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 15:00:18,151 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 15:00:18,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 15:00:18,164 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 15:00:18,166 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 15:00:18,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 03:00:18 BoogieIcfgContainer [2022-07-19 15:00:18,187 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 15:00:18,188 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 15:00:18,188 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 15:00:18,189 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 15:00:18,189 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:00:17" (3/4) ... [2022-07-19 15:00:18,190 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-19 15:00:18,213 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 15:00:18,213 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 15:00:18,214 INFO L158 Benchmark]: Toolchain (without parser) took 807.94ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 53.8MB in the beginning and 76.6MB in the end (delta: -22.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 15:00:18,214 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 88.1MB. Free memory was 58.1MB in the beginning and 58.1MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 15:00:18,214 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.60ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 53.6MB in the beginning and 83.3MB in the end (delta: -29.7MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2022-07-19 15:00:18,214 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.08ms. Allocated memory is still 107.0MB. Free memory was 83.3MB in the beginning and 81.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 15:00:18,215 INFO L158 Benchmark]: Boogie Preprocessor took 13.08ms. Allocated memory is still 107.0MB. Free memory was 81.9MB in the beginning and 80.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 15:00:18,215 INFO L158 Benchmark]: RCFGBuilder took 174.82ms. Allocated memory is still 107.0MB. Free memory was 80.9MB in the beginning and 72.1MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 15:00:18,215 INFO L158 Benchmark]: TraceAbstraction took 376.11ms. Allocated memory is still 107.0MB. Free memory was 71.4MB in the beginning and 78.4MB in the end (delta: -7.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 15:00:18,215 INFO L158 Benchmark]: Witness Printer took 25.39ms. Allocated memory is still 107.0MB. Free memory was 78.4MB in the beginning and 76.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 15:00:18,231 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 88.1MB. Free memory was 58.1MB in the beginning and 58.1MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 191.60ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 53.6MB in the beginning and 83.3MB in the end (delta: -29.7MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.08ms. Allocated memory is still 107.0MB. Free memory was 83.3MB in the beginning and 81.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.08ms. Allocated memory is still 107.0MB. Free memory was 81.9MB in the beginning and 80.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 174.82ms. Allocated memory is still 107.0MB. Free memory was 80.9MB in the beginning and 72.1MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 376.11ms. Allocated memory is still 107.0MB. Free memory was 71.4MB in the beginning and 78.4MB in the end (delta: -7.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 25.39ms. Allocated memory is still 107.0MB. Free memory was 78.4MB in the beginning and 76.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] unsigned int x = 1; [L19] unsigned int y = __VERIFIER_nondet_uint(); [L21] COND FALSE !(!(y > 0)) VAL [x=1, y=1] [L23] COND FALSE !(x < y) VAL [x=1, y=1] [L31] CALL __VERIFIER_assert(x != y) [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L12] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 15 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 15 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-19 15:00:18,262 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE