./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array30_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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/array-patterns/array30_pattern.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 40316420d170caa386c877d75b06d463d59aea9e ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 01:13:58,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 01:13:58,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 01:13:58,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 01:13:58,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 01:13:58,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 01:13:58,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 01:13:58,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 01:13:58,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 01:13:58,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 01:13:58,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 01:13:58,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 01:13:58,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 01:13:58,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 01:13:58,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 01:13:58,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 01:13:58,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 01:13:58,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 01:13:58,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 01:13:58,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 01:13:58,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 01:13:58,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 01:13:58,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 01:13:58,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 01:13:58,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 01:13:58,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 01:13:58,289 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 01:13:58,291 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 01:13:58,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 01:13:58,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 01:13:58,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 01:13:58,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 01:13:58,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 01:13:58,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 01:13:58,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 01:13:58,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 01:13:58,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 01:13:58,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 01:13:58,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 01:13:58,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 01:13:58,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 01:13:58,303 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 01:13:58,337 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 01:13:58,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 01:13:58,339 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 01:13:58,339 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 01:13:58,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 01:13:58,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 01:13:58,341 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 01:13:58,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 01:13:58,342 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 01:13:58,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 01:13:58,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 01:13:58,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 01:13:58,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 01:13:58,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 01:13:58,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 01:13:58,344 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 01:13:58,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 01:13:58,344 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 01:13:58,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 01:13:58,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 01:13:58,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 01:13:58,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 01:13:58,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 01:13:58,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 01:13:58,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 01:13:58,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 01:13:58,346 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 01:13:58,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 01:13:58,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 01:13:58,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 01:13:58,347 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40316420d170caa386c877d75b06d463d59aea9e [2021-08-29 01:13:58,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 01:13:58,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 01:13:58,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 01:13:58,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 01:13:58,745 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 01:13:58,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array30_pattern.c [2021-08-29 01:13:58,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da98f6917/96ab7c8db9eb463ba965d681bead40bf/FLAG119f0d8c0 [2021-08-29 01:13:59,193 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 01:13:59,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array30_pattern.c [2021-08-29 01:13:59,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da98f6917/96ab7c8db9eb463ba965d681bead40bf/FLAG119f0d8c0 [2021-08-29 01:13:59,590 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da98f6917/96ab7c8db9eb463ba965d681bead40bf [2021-08-29 01:13:59,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 01:13:59,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 01:13:59,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 01:13:59,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 01:13:59,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 01:13:59,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 01:13:59" (1/1) ... [2021-08-29 01:13:59,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51b674f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:13:59, skipping insertion in model container [2021-08-29 01:13:59,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 01:13:59" (1/1) ... [2021-08-29 01:13:59,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 01:13:59,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 01:13:59,710 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array30_pattern.c[1189,1202] [2021-08-29 01:13:59,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 01:13:59,729 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 01:13:59,743 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array30_pattern.c[1189,1202] [2021-08-29 01:13:59,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 01:13:59,801 INFO L208 MainTranslator]: Completed translation [2021-08-29 01:13:59,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:13:59 WrapperNode [2021-08-29 01:13:59,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 01:13:59,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 01:13:59,816 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 01:13:59,817 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 01:13:59,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:13:59" (1/1) ... [2021-08-29 01:13:59,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:13:59" (1/1) ... [2021-08-29 01:13:59,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 01:13:59,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 01:13:59,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 01:13:59,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 01:13:59,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:13:59" (1/1) ... [2021-08-29 01:13:59,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:13:59" (1/1) ... [2021-08-29 01:13:59,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:13:59" (1/1) ... [2021-08-29 01:13:59,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:13:59" (1/1) ... [2021-08-29 01:13:59,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:13:59" (1/1) ... [2021-08-29 01:13:59,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:13:59" (1/1) ... [2021-08-29 01:13:59,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:13:59" (1/1) ... [2021-08-29 01:13:59,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 01:13:59,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 01:13:59,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 01:13:59,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 01:13:59,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:13:59" (1/1) ... [2021-08-29 01:13:59,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 01:13:59,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:13:59,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 01:13:59,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 01:13:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 01:13:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 01:13:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-29 01:13:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 01:13:59,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 01:13:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-29 01:13:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 01:14:00,155 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 01:14:00,157 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-08-29 01:14:00,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 01:14:00 BoogieIcfgContainer [2021-08-29 01:14:00,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 01:14:00,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 01:14:00,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 01:14:00,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 01:14:00,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 01:13:59" (1/3) ... [2021-08-29 01:14:00,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b1aab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 01:14:00, skipping insertion in model container [2021-08-29 01:14:00,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:13:59" (2/3) ... [2021-08-29 01:14:00,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b1aab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 01:14:00, skipping insertion in model container [2021-08-29 01:14:00,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 01:14:00" (3/3) ... [2021-08-29 01:14:00,166 INFO L111 eAbstractionObserver]: Analyzing ICFG array30_pattern.c [2021-08-29 01:14:00,170 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 01:14:00,170 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 01:14:00,219 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 01:14:00,227 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 01:14:00,228 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 01:14:00,240 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:14:00,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 01:14:00,248 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:14:00,249 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:14:00,249 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:14:00,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:14:00,259 INFO L82 PathProgramCache]: Analyzing trace with hash -409725857, now seen corresponding path program 1 times [2021-08-29 01:14:00,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:14:00,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926656386] [2021-08-29 01:14:00,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:14:00,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:14:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:14:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:14:00,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:14:00,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926656386] [2021-08-29 01:14:00,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926656386] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 01:14:00,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:14:00,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 01:14:00,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803463069] [2021-08-29 01:14:00,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 01:14:00,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:14:00,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 01:14:00,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 01:14:00,480 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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 5.0) internal successors, (10), 2 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) [2021-08-29 01:14:00,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:14:00,570 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2021-08-29 01:14:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 01:14:00,587 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) Word has length 10 [2021-08-29 01:14:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:14:00,594 INFO L225 Difference]: With dead ends: 43 [2021-08-29 01:14:00,594 INFO L226 Difference]: Without dead ends: 19 [2021-08-29 01:14:00,597 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 01:14:00,599 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.94ms IncrementalHoareTripleChecker+Time [2021-08-29 01:14:00,600 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 27 Unknown, 0 Unchecked, 0.30ms Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 76.94ms Time] [2021-08-29 01:14:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-29 01:14:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-29 01:14:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:14:00,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-08-29 01:14:00,625 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2021-08-29 01:14:00,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:14:00,625 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-08-29 01:14:00,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-08-29 01:14:00,626 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-08-29 01:14:00,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 01:14:00,626 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:14:00,627 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:14:00,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 01:14:00,627 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:14:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:14:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1934801258, now seen corresponding path program 1 times [2021-08-29 01:14:00,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:14:00,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503902153] [2021-08-29 01:14:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:14:00,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:14:00,660 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:14:00,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872949698] [2021-08-29 01:14:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:14:00,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:14:00,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:14:00,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 01:14:00,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 01:14:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:14:00,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 01:14:00,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:14:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:14:00,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 01:14:00,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:14:00,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503902153] [2021-08-29 01:14:00,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:14:00,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872949698] [2021-08-29 01:14:00,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872949698] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 01:14:00,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:14:00,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 01:14:00,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357962073] [2021-08-29 01:14:00,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 01:14:00,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:14:00,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 01:14:00,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-29 01:14:00,819 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-08-29 01:14:00,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:14:00,942 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-08-29 01:14:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 01:14:00,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) Word has length 10 [2021-08-29 01:14:00,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:14:00,943 INFO L225 Difference]: With dead ends: 38 [2021-08-29 01:14:00,944 INFO L226 Difference]: Without dead ends: 29 [2021-08-29 01:14:00,944 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.26ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-29 01:14:00,946 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.63ms IncrementalHoareTripleChecker+Time [2021-08-29 01:14:00,947 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 53 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 75.63ms Time] [2021-08-29 01:14:00,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-29 01:14:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2021-08-29 01:14:00,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:14:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-08-29 01:14:00,955 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 10 [2021-08-29 01:14:00,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:14:00,955 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-08-29 01:14:00,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-08-29 01:14:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-08-29 01:14:00,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 01:14:00,958 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:14:00,959 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:14:00,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 01:14:01,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:14:01,173 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:14:01,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:14:01,174 INFO L82 PathProgramCache]: Analyzing trace with hash 761451258, now seen corresponding path program 1 times [2021-08-29 01:14:01,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:14:01,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326130181] [2021-08-29 01:14:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:14:01,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:14:01,183 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:14:01,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142608376] [2021-08-29 01:14:01,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:14:01,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:14:01,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:14:01,185 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 01:14:01,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 01:14:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:14:01,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-29 01:14:01,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:14:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 01:14:01,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 01:14:01,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:14:01,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326130181] [2021-08-29 01:14:01,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:14:01,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142608376] [2021-08-29 01:14:01,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142608376] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 01:14:01,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:14:01,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 01:14:01,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907066376] [2021-08-29 01:14:01,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 01:14:01,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:14:01,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 01:14:01,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 01:14:01,328 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:14:01,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:14:01,402 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-08-29 01:14:01,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 01:14:01,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2021-08-29 01:14:01,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:14:01,404 INFO L225 Difference]: With dead ends: 43 [2021-08-29 01:14:01,404 INFO L226 Difference]: Without dead ends: 27 [2021-08-29 01:14:01,404 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.47ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 01:14:01,405 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.63ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.63ms IncrementalHoareTripleChecker+Time [2021-08-29 01:14:01,406 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 54 Unknown, 0 Unchecked, 0.63ms Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 61.63ms Time] [2021-08-29 01:14:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-29 01:14:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-08-29 01:14:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:14:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-29 01:14:01,411 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2021-08-29 01:14:01,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:14:01,412 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-29 01:14:01,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:14:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-29 01:14:01,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 01:14:01,413 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:14:01,413 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:14:01,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 01:14:01,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-29 01:14:01,636 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:14:01,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:14:01,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1879431543, now seen corresponding path program 1 times [2021-08-29 01:14:01,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:14:01,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705832088] [2021-08-29 01:14:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:14:01,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:14:01,649 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:14:01,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369413030] [2021-08-29 01:14:01,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:14:01,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:14:01,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:14:01,656 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 01:14:01,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 01:14:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:14:01,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-29 01:14:01,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:14:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 01:14:01,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 01:14:01,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:14:01,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705832088] [2021-08-29 01:14:01,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:14:01,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369413030] [2021-08-29 01:14:01,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369413030] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 01:14:01,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:14:01,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 01:14:01,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706141461] [2021-08-29 01:14:01,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 01:14:01,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:14:01,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 01:14:01,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-29 01:14:01,785 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:14:01,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:14:01,890 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2021-08-29 01:14:01,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 01:14:01,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 22 [2021-08-29 01:14:01,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:14:01,893 INFO L225 Difference]: With dead ends: 75 [2021-08-29 01:14:01,894 INFO L226 Difference]: Without dead ends: 57 [2021-08-29 01:14:01,894 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.99ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-29 01:14:01,898 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.10ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.01ms IncrementalHoareTripleChecker+Time [2021-08-29 01:14:01,908 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 1.10ms Time], IncrementalHoareTripleChecker [14 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 74.01ms Time] [2021-08-29 01:14:01,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-29 01:14:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 25. [2021-08-29 01:14:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:14:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-08-29 01:14:01,919 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-08-29 01:14:01,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:14:01,920 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-08-29 01:14:01,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:14:01,920 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-08-29 01:14:01,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 01:14:01,921 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:14:01,921 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:14:01,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-29 01:14:02,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:14:02,137 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:14:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:14:02,137 INFO L82 PathProgramCache]: Analyzing trace with hash 858363189, now seen corresponding path program 1 times [2021-08-29 01:14:02,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:14:02,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604504244] [2021-08-29 01:14:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:14:02,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:14:02,146 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:14:02,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436334231] [2021-08-29 01:14:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:14:02,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:14:02,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:14:02,160 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 01:14:02,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 01:14:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:14:02,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-29 01:14:02,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:14:02,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-08-29 01:14:02,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-08-29 01:14:02,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-08-29 01:14:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:14:02,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:14:04,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 01:14:04,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 82 [2021-08-29 01:14:04,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 4 [2021-08-29 01:14:04,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 4 [2021-08-29 01:14:04,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 01:14:04,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 110 [2021-08-29 01:14:50,922 WARN L210 SmtUtils]: Spent 11.37s on a formula simplification that was a NOOP. DAG size: 53 [2021-08-29 01:14:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:14:52,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:14:52,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604504244] [2021-08-29 01:14:52,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:14:52,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436334231] [2021-08-29 01:14:52,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436334231] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 01:14:52,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 01:14:52,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-08-29 01:14:52,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183612614] [2021-08-29 01:14:52,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-29 01:14:52,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:14:52,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-29 01:14:52,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-29 01:14:52,451 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:14:52,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:14:52,452 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-08-29 01:14:52,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 01:14:52,452 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 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 22 [2021-08-29 01:14:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:14:52,452 INFO L225 Difference]: With dead ends: 25 [2021-08-29 01:14:52,452 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 01:14:52,453 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 16598.68ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-29 01:14:52,453 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-08-29 01:14:52,454 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-08-29 01:14:52,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 01:14:52,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 01:14:52,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:14:52,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 01:14:52,454 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-08-29 01:14:52,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:14:52,455 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 01:14:52,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:14:52,455 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 01:14:52,455 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 01:14:52,457 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 01:14:52,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 01:14:52,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:14:52,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 01:14:52,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 01:14:52,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 01:14:52,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 01:14:52,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 01:14:52,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 01:14:52,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 01:14:52,687 INFO L858 garLoopResultBuilder]: For program point L27(line 27) no Hoare annotation was computed. [2021-08-29 01:14:52,687 INFO L854 garLoopResultBuilder]: At program point L40(lines 35 41) the Hoare annotation is: false [2021-08-29 01:14:52,687 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 01:14:52,687 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 01:14:52,687 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 01:14:52,687 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 29) no Hoare annotation was computed. [2021-08-29 01:14:52,687 INFO L858 garLoopResultBuilder]: For program point L53-2(lines 53 55) no Hoare annotation was computed. [2021-08-29 01:14:52,687 INFO L854 garLoopResultBuilder]: At program point L53-3(lines 53 55) the Hoare annotation is: false [2021-08-29 01:14:52,687 INFO L858 garLoopResultBuilder]: For program point L53-4(lines 53 55) no Hoare annotation was computed. [2021-08-29 01:14:52,688 INFO L858 garLoopResultBuilder]: For program point L37(lines 37 40) no Hoare annotation was computed. [2021-08-29 01:14:52,688 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 01:14:52,688 INFO L858 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2021-08-29 01:14:52,688 INFO L858 garLoopResultBuilder]: For program point L29-1(line 29) no Hoare annotation was computed. [2021-08-29 01:14:52,688 INFO L858 garLoopResultBuilder]: For program point L29-3(line 29) no Hoare annotation was computed. [2021-08-29 01:14:52,688 INFO L858 garLoopResultBuilder]: For program point L58-2(lines 58 60) no Hoare annotation was computed. [2021-08-29 01:14:52,688 INFO L854 garLoopResultBuilder]: At program point L58-3(lines 58 60) the Hoare annotation is: false [2021-08-29 01:14:52,688 INFO L858 garLoopResultBuilder]: For program point L58-4(lines 58 60) no Hoare annotation was computed. [2021-08-29 01:14:52,688 INFO L858 garLoopResultBuilder]: For program point L54-2(lines 54 55) no Hoare annotation was computed. [2021-08-29 01:14:52,688 INFO L854 garLoopResultBuilder]: At program point L54-3(lines 54 55) the Hoare annotation is: false [2021-08-29 01:14:52,688 INFO L861 garLoopResultBuilder]: At program point L63(lines 43 64) the Hoare annotation is: true [2021-08-29 01:14:52,688 INFO L858 garLoopResultBuilder]: For program point L26(lines 26 28) no Hoare annotation was computed. [2021-08-29 01:14:52,689 INFO L858 garLoopResultBuilder]: For program point L59-2(lines 59 60) no Hoare annotation was computed. [2021-08-29 01:14:52,689 INFO L854 garLoopResultBuilder]: At program point L59-3(lines 59 60) the Hoare annotation is: false [2021-08-29 01:14:52,692 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 01:14:52,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 01:14:52 BoogieIcfgContainer [2021-08-29 01:14:52,699 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 01:14:52,699 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 01:14:52,700 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 01:14:52,700 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 01:14:52,700 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 01:14:00" (3/4) ... [2021-08-29 01:14:52,702 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 01:14:52,710 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-08-29 01:14:52,710 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-08-29 01:14:52,710 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 01:14:52,710 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 01:14:52,735 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 01:14:52,735 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 01:14:52,736 INFO L158 Benchmark]: Toolchain (without parser) took 53142.38ms. Allocated memory was 65.0MB in the beginning and 109.1MB in the end (delta: 44.0MB). Free memory was 45.4MB in the beginning and 39.0MB in the end (delta: 6.4MB). Peak memory consumption was 50.6MB. Max. memory is 16.1GB. [2021-08-29 01:14:52,736 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 65.0MB. Free memory was 46.9MB in the beginning and 46.9MB in the end (delta: 48.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 01:14:52,736 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.24ms. Allocated memory is still 65.0MB. Free memory was 45.1MB in the beginning and 49.3MB in the end (delta: -4.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-08-29 01:14:52,737 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.48ms. Allocated memory is still 65.0MB. Free memory was 49.3MB in the beginning and 47.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 01:14:52,737 INFO L158 Benchmark]: Boogie Preprocessor took 34.78ms. Allocated memory is still 65.0MB. Free memory was 47.6MB in the beginning and 46.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 01:14:52,737 INFO L158 Benchmark]: RCFGBuilder took 260.61ms. Allocated memory is still 65.0MB. Free memory was 46.3MB in the beginning and 36.9MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 01:14:52,738 INFO L158 Benchmark]: TraceAbstraction took 52538.51ms. Allocated memory was 65.0MB in the beginning and 109.1MB in the end (delta: 44.0MB). Free memory was 36.6MB in the beginning and 42.2MB in the end (delta: -5.6MB). Peak memory consumption was 39.0MB. Max. memory is 16.1GB. [2021-08-29 01:14:52,738 INFO L158 Benchmark]: Witness Printer took 35.95ms. Allocated memory is still 109.1MB. Free memory was 42.2MB in the beginning and 39.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 01:14:52,739 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 65.0MB. Free memory was 46.9MB in the beginning and 46.9MB in the end (delta: 48.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 209.24ms. Allocated memory is still 65.0MB. Free memory was 45.1MB in the beginning and 49.3MB in the end (delta: -4.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.48ms. Allocated memory is still 65.0MB. Free memory was 49.3MB in the beginning and 47.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.78ms. Allocated memory is still 65.0MB. Free memory was 47.6MB in the beginning and 46.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 260.61ms. Allocated memory is still 65.0MB. Free memory was 46.3MB in the beginning and 36.9MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 52538.51ms. Allocated memory was 65.0MB in the beginning and 109.1MB in the end (delta: 44.0MB). Free memory was 36.6MB in the beginning and 42.2MB in the end (delta: -5.6MB). Peak memory consumption was 39.0MB. Max. memory is 16.1GB. * Witness Printer took 35.95ms. Allocated memory is still 109.1MB. Free memory was 42.2MB in the beginning and 39.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 29]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 52474.36ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 14.60ms, AutomataDifference: 486.59ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 21.62ms, InitialAbstractionConstructionTime: 9.33ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 126 SdHoareTripleChecker+Valid, 288.20ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 126 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 195.08ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 45 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 212 IncrementalHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 0 mSDtfsCounter, 212 mSolverCounterSat, 3.56ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 16690.42ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=4, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 34.45ms AutomataMinimizationTime, 5 MinimizatonAttempts, 44 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 7 NumberOfFragments, 6 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 13.04ms HoareSimplificationTime, 6 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 3.61ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 35.52ms SsaConstructionTime, 106.78ms SatisfiabilityAnalysisTime, 50534.24ms InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 96 ConstructedInterpolants, 1 QuantifiedInterpolants, 1189 SizeOfPredicates, 33 NumberOfNonLiveVariables, 348 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 6/14 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 43]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 54]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2021-08-29 01:14:52,783 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...