./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-new/half.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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-new/half.i -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 cd8ea842760c1d795b2a0ad721eea8bf94078967bffa91c75f5537bf4a53b968 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 15:42:11,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 15:42:11,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 15:42:11,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 15:42:11,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 15:42:11,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 15:42:11,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 15:42:11,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 15:42:11,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 15:42:11,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 15:42:11,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 15:42:11,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 15:42:11,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 15:42:11,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 15:42:11,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 15:42:11,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 15:42:11,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 15:42:11,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 15:42:11,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 15:42:11,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 15:42:11,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 15:42:11,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 15:42:11,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 15:42:11,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 15:42:11,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 15:42:11,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 15:42:11,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 15:42:11,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 15:42:11,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 15:42:11,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 15:42:11,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 15:42:11,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 15:42:11,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 15:42:11,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 15:42:11,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 15:42:11,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 15:42:11,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 15:42:11,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 15:42:11,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 15:42:11,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 15:42:11,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 15:42:11,425 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 15:42:11,446 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 15:42:11,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 15:42:11,447 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 15:42:11,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 15:42:11,448 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 15:42:11,448 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 15:42:11,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 15:42:11,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 15:42:11,449 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 15:42:11,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 15:42:11,450 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 15:42:11,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 15:42:11,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 15:42:11,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 15:42:11,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 15:42:11,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 15:42:11,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 15:42:11,451 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 15:42:11,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 15:42:11,451 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 15:42:11,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 15:42:11,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 15:42:11,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 15:42:11,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 15:42:11,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 15:42:11,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 15:42:11,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 15:42:11,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 15:42:11,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 15:42:11,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 15:42:11,453 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 15:42:11,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 15:42:11,453 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 15:42:11,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 15:42:11,454 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 15:42:11,454 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd8ea842760c1d795b2a0ad721eea8bf94078967bffa91c75f5537bf4a53b968 [2023-02-18 15:42:11,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 15:42:11,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 15:42:11,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 15:42:11,661 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 15:42:11,662 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 15:42:11,662 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/half.i [2023-02-18 15:42:12,620 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 15:42:12,782 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 15:42:12,783 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/half.i [2023-02-18 15:42:12,786 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f8aede83/d5f09ab5795e432c9c17702053fb6b77/FLAG629b240ac [2023-02-18 15:42:12,798 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f8aede83/d5f09ab5795e432c9c17702053fb6b77 [2023-02-18 15:42:12,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 15:42:12,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 15:42:12,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 15:42:12,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 15:42:12,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 15:42:12,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:42:12" (1/1) ... [2023-02-18 15:42:12,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2e0519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:42:12, skipping insertion in model container [2023-02-18 15:42:12,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:42:12" (1/1) ... [2023-02-18 15:42:12,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 15:42:12,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 15:42:12,905 WARN L237 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-new/half.i[891,904] [2023-02-18 15:42:12,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 15:42:12,920 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 15:42:12,929 WARN L237 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-new/half.i[891,904] [2023-02-18 15:42:12,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 15:42:12,941 INFO L208 MainTranslator]: Completed translation [2023-02-18 15:42:12,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:42:12 WrapperNode [2023-02-18 15:42:12,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 15:42:12,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 15:42:12,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 15:42:12,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 15:42:12,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:42:12" (1/1) ... [2023-02-18 15:42:12,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:42:12" (1/1) ... [2023-02-18 15:42:12,959 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2023-02-18 15:42:12,959 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 15:42:12,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 15:42:12,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 15:42:12,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 15:42:12,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:42:12" (1/1) ... [2023-02-18 15:42:12,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:42:12" (1/1) ... [2023-02-18 15:42:12,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:42:12" (1/1) ... [2023-02-18 15:42:12,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:42:12" (1/1) ... [2023-02-18 15:42:12,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:42:12" (1/1) ... [2023-02-18 15:42:12,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:42:12" (1/1) ... [2023-02-18 15:42:12,970 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:42:12" (1/1) ... [2023-02-18 15:42:12,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:42:12" (1/1) ... [2023-02-18 15:42:12,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 15:42:12,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 15:42:12,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 15:42:12,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 15:42:12,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:42:12" (1/1) ... [2023-02-18 15:42:12,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 15:42:12,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:42:12,998 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) [2023-02-18 15:42:13,002 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 [2023-02-18 15:42:13,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 15:42:13,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 15:42:13,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 15:42:13,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 15:42:13,062 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 15:42:13,063 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 15:42:13,129 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 15:42:13,133 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 15:42:13,133 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-18 15:42:13,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:42:13 BoogieIcfgContainer [2023-02-18 15:42:13,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 15:42:13,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 15:42:13,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 15:42:13,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 15:42:13,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 03:42:12" (1/3) ... [2023-02-18 15:42:13,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e5ce90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:42:13, skipping insertion in model container [2023-02-18 15:42:13,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:42:12" (2/3) ... [2023-02-18 15:42:13,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e5ce90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:42:13, skipping insertion in model container [2023-02-18 15:42:13,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:42:13" (3/3) ... [2023-02-18 15:42:13,140 INFO L112 eAbstractionObserver]: Analyzing ICFG half.i [2023-02-18 15:42:13,150 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 15:42:13,151 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 15:42:13,180 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 15:42:13,184 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@273020af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 15:42:13,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 15:42:13,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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) [2023-02-18 15:42:13,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 15:42:13,190 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:42:13,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:42:13,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:42:13,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:42:13,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1807274184, now seen corresponding path program 1 times [2023-02-18 15:42:13,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:42:13,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551981448] [2023-02-18 15:42:13,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:42:13,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:42:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:42:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:42:13,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:42:13,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551981448] [2023-02-18 15:42:13,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551981448] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:42:13,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:42:13,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 15:42:13,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823160731] [2023-02-18 15:42:13,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:42:13,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 15:42:13,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:42:13,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 15:42:13,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 15:42:13,340 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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) [2023-02-18 15:42:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:42:13,350 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-02-18 15:42:13,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 15:42:13,353 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 [2023-02-18 15:42:13,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:42:13,359 INFO L225 Difference]: With dead ends: 22 [2023-02-18 15:42:13,359 INFO L226 Difference]: Without dead ends: 10 [2023-02-18 15:42:13,361 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 [2023-02-18 15:42:13,365 INFO L413 NwaCegarLoop]: 16 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, 16 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 [2023-02-18 15:42:13,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:42:13,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-02-18 15:42:13,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-02-18 15:42:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2023-02-18 15:42:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-02-18 15:42:13,384 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2023-02-18 15:42:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:42:13,385 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-02-18 15:42:13,385 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) [2023-02-18 15:42:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-02-18 15:42:13,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 15:42:13,385 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:42:13,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:42:13,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 15:42:13,386 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:42:13,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:42:13,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1806946483, now seen corresponding path program 1 times [2023-02-18 15:42:13,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:42:13,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088585745] [2023-02-18 15:42:13,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:42:13,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:42:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:42:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:42:13,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:42:13,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088585745] [2023-02-18 15:42:13,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088585745] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:42:13,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:42:13,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 15:42:13,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116820954] [2023-02-18 15:42:13,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:42:13,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 15:42:13,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:42:13,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 15:42:13,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 15:42:13,544 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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) [2023-02-18 15:42:13,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:42:13,600 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-02-18 15:42:13,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 15:42:13,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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 [2023-02-18 15:42:13,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:42:13,602 INFO L225 Difference]: With dead ends: 22 [2023-02-18 15:42:13,602 INFO L226 Difference]: Without dead ends: 16 [2023-02-18 15:42:13,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-02-18 15:42:13,603 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:42:13,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:42:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-02-18 15:42:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2023-02-18 15:42:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2023-02-18 15:42:13,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-18 15:42:13,607 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-02-18 15:42:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:42:13,607 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-18 15:42:13,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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) [2023-02-18 15:42:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-18 15:42:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 15:42:13,608 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:42:13,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:42:13,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 15:42:13,608 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:42:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:42:13,609 INFO L85 PathProgramCache]: Analyzing trace with hash -838413826, now seen corresponding path program 1 times [2023-02-18 15:42:13,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:42:13,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208905786] [2023-02-18 15:42:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:42:13,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:42:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:42:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:42:13,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:42:13,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208905786] [2023-02-18 15:42:13,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208905786] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:42:13,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031257096] [2023-02-18 15:42:13,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:42:13,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:42:13,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:42:13,705 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) [2023-02-18 15:42:13,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 15:42:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:42:13,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 15:42:13,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:42:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:42:13,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:42:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:42:13,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031257096] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:42:13,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:42:13,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2023-02-18 15:42:13,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29148687] [2023-02-18 15:42:13,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:42:13,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 15:42:13,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:42:13,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 15:42:13,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-02-18 15:42:13,839 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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) [2023-02-18 15:42:13,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:42:13,939 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2023-02-18 15:42:13,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 15:42:13,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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 [2023-02-18 15:42:13,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:42:13,940 INFO L225 Difference]: With dead ends: 32 [2023-02-18 15:42:13,940 INFO L226 Difference]: Without dead ends: 22 [2023-02-18 15:42:13,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-02-18 15:42:13,942 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:42:13,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:42:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-18 15:42:13,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2023-02-18 15:42:13,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2023-02-18 15:42:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-02-18 15:42:13,948 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2023-02-18 15:42:13,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:42:13,948 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-02-18 15:42:13,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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) [2023-02-18 15:42:13,948 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-02-18 15:42:13,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 15:42:13,949 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:42:13,949 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:42:13,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 15:42:14,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:42:14,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:42:14,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:42:14,157 INFO L85 PathProgramCache]: Analyzing trace with hash -355206639, now seen corresponding path program 1 times [2023-02-18 15:42:14,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:42:14,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383670771] [2023-02-18 15:42:14,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:42:14,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:42:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:42:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:42:14,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:42:14,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383670771] [2023-02-18 15:42:14,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383670771] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:42:14,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426553763] [2023-02-18 15:42:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:42:14,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:42:14,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:42:14,365 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) [2023-02-18 15:42:14,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 15:42:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:42:14,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 15:42:14,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:42:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:42:14,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:42:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:42:14,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426553763] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:42:14,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:42:14,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 23 [2023-02-18 15:42:14,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794806492] [2023-02-18 15:42:14,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:42:14,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 15:42:14,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:42:14,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 15:42:14,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2023-02-18 15:42:14,654 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 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) [2023-02-18 15:42:14,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:42:14,947 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2023-02-18 15:42:14,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 15:42:14,948 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 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 13 [2023-02-18 15:42:14,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:42:14,948 INFO L225 Difference]: With dead ends: 41 [2023-02-18 15:42:14,948 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 15:42:14,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 15:42:14,949 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:42:14,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 36 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:42:14,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 15:42:14,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2023-02-18 15:42:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2023-02-18 15:42:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-02-18 15:42:14,953 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2023-02-18 15:42:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:42:14,954 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-02-18 15:42:14,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 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) [2023-02-18 15:42:14,955 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-02-18 15:42:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 15:42:14,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:42:14,955 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:42:14,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 15:42:15,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-18 15:42:15,160 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:42:15,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:42:15,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1670059902, now seen corresponding path program 2 times [2023-02-18 15:42:15,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:42:15,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581412783] [2023-02-18 15:42:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:42:15,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:42:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:42:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:42:15,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:42:15,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581412783] [2023-02-18 15:42:15,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581412783] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:42:15,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808552732] [2023-02-18 15:42:15,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:42:15,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:42:15,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:42:15,280 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) [2023-02-18 15:42:15,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 15:42:15,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:42:15,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:42:15,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 15:42:15,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:42:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:42:15,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:42:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:42:15,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808552732] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:42:15,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:42:15,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 30 [2023-02-18 15:42:15,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723984805] [2023-02-18 15:42:15,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:42:15,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 15:42:15,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:42:15,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 15:42:15,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2023-02-18 15:42:15,592 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2023-02-18 15:42:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:42:15,746 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-02-18 15:42:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 15:42:15,747 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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 [2023-02-18 15:42:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:42:15,747 INFO L225 Difference]: With dead ends: 36 [2023-02-18 15:42:15,747 INFO L226 Difference]: Without dead ends: 0 [2023-02-18 15:42:15,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 15:42:15,748 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:42:15,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 18 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:42:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-18 15:42:15,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-18 15:42:15,749 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) [2023-02-18 15:42:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-18 15:42:15,750 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2023-02-18 15:42:15,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:42:15,750 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-18 15:42:15,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2023-02-18 15:42:15,750 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-18 15:42:15,750 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-18 15:42:15,752 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-18 15:42:15,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 15:42:15,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:42:15,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-18 15:42:15,962 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-18 15:42:15,962 INFO L899 garLoopResultBuilder]: For program point L29-2(lines 29 33) no Hoare annotation was computed. [2023-02-18 15:42:15,963 INFO L895 garLoopResultBuilder]: At program point L29-3(lines 29 33) the Hoare annotation is: (let ((.cse7 (+ |ULTIMATE.start_main_~i~0#1| 1))) (let ((.cse26 (* 2 |ULTIMATE.start_main_~n~0#1|)) (.cse32 (div .cse7 2))) (let ((.cse21 (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~k~0#1|)) (.cse23 (< |ULTIMATE.start_main_~k~0#1| 0)) (.cse24 (< .cse7 (* |ULTIMATE.start_main_~k~0#1| 2))) (.cse22 (let ((.cse37 (= 0 (mod |ULTIMATE.start_main_~i~0#1| 2)))) (and .cse37 (or .cse37 (not (< |ULTIMATE.start_main_~i~0#1| 0)))))) (.cse12 (div |ULTIMATE.start_main_~i~0#1| 2)) (.cse6 (< .cse7 0)) (.cse13 (* .cse32 2)) (.cse25 (<= |ULTIMATE.start_main_~i~0#1| (+ .cse26 (- 1)))) (.cse36 (* 2 |ULTIMATE.start_main_~k~0#1|)) (.cse30 (+ |ULTIMATE.start_main_~n~0#1| (- 1))) (.cse3 (+ |ULTIMATE.start_main_~i~0#1| (- 1)))) (let ((.cse2 (<= .cse3 1)) (.cse4 (= .cse30 0)) (.cse16 (< 1 .cse36)) (.cse20 (let ((.cse34 (<= .cse3 0)) (.cse35 (<= 0 (+ .cse36 (- 1))))) (or (let ((.cse33 (<= (+ |ULTIMATE.start_main_~k~0#1| (* (- 1) |ULTIMATE.start_main_~n~0#1|) 1) 0))) (and (or (not .cse33) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~k~0#1|)) (or .cse33 .cse25) .cse34 .cse35)) (and .cse34 .cse35) (< |ULTIMATE.start_main_~i~0#1| .cse36)))) (.cse1 (or .cse22 (let ((.cse31 (* |ULTIMATE.start_main_~n~0#1| 2))) (and (or (< .cse7 (+ (* .cse12 2) 2)) (< .cse7 (+ .cse31 2)) .cse6) (or (< .cse32 0) (< .cse30 0) (< (+ .cse31 (- 2)) .cse7) (< .cse13 .cse7)))))) (.cse15 (or .cse21 .cse23 .cse24))) (let ((.cse0 (<= |ULTIMATE.start_main_~n~0#1| 1)) (.cse14 (<= 0 .cse30)) (.cse17 (<= |ULTIMATE.start_main_~i~0#1| .cse26)) (.cse19 (<= .cse26 |ULTIMATE.start_main_~i~0#1|)) (.cse18 (or (and .cse1 .cse2 .cse4 .cse16) (and .cse20 .cse1) (and .cse1 .cse15)))) (or (and .cse0 .cse1 .cse2 (= .cse3 1) .cse4 (or (let ((.cse5 (= 0 (mod .cse7 2)))) (and (or .cse5 (not .cse6)) .cse5)) (let ((.cse9 (+ 1 |ULTIMATE.start_main_~n~0#1|))) (let ((.cse11 (+ .cse7 1)) (.cse10 (* .cse9 2))) (and (let ((.cse8 (+ .cse12 1))) (or (< .cse8 0) (< (+ .cse9 (- 1)) 0) (< (+ .cse10 (- 2)) .cse11) (< (* .cse8 2) .cse11))) (or (< .cse11 0) (< .cse11 (+ .cse13 2)) (< .cse11 (+ .cse10 2))))))) .cse14 .cse15 .cse16) (and .cse17 .cse18 .cse19 .cse15) (and .cse0 .cse20 .cse4 .cse14 (= .cse3 0)) (and .cse1 .cse17 (or .cse21 .cse22 .cse23 .cse24) .cse19 .cse15) (and .cse20 .cse25 (<= .cse26 .cse7)) (let ((.cse28 (= |ULTIMATE.start_main_~i~0#1| 0))) (and (let ((.cse27 (= |ULTIMATE.start_main_~k~0#1| 0))) (let ((.cse29 (or (not .cse27) (and (= 0 |ULTIMATE.start_main_~k~0#1|) (= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~n~0#1|))))) (or (and (or .cse27 .cse28) .cse29) (and (or .cse27 (<= |ULTIMATE.start_main_~k~0#1| 0)) .cse29)))) (= |ULTIMATE.start_main_~n~0#1| 0) .cse28)) (and (<= .cse30 1) .cse18 (<= 0 (+ .cse30 (- 1))) (= (+ .cse3 (- 1)) 1)))))))) [2023-02-18 15:42:15,963 INFO L899 garLoopResultBuilder]: For program point L29-4(lines 29 33) no Hoare annotation was computed. [2023-02-18 15:42:15,963 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2023-02-18 15:42:15,964 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-18 15:42:15,964 INFO L902 garLoopResultBuilder]: At program point main_returnLabel#1(lines 24 36) the Hoare annotation is: true [2023-02-18 15:42:15,964 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-18 15:42:15,964 INFO L899 garLoopResultBuilder]: For program point L30(lines 30 32) no Hoare annotation was computed. [2023-02-18 15:42:15,964 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-18 15:42:15,964 INFO L899 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2023-02-18 15:42:15,964 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2023-02-18 15:42:15,964 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2023-02-18 15:42:15,965 INFO L902 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2023-02-18 15:42:15,966 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-02-18 15:42:15,968 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-18 15:42:15,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 03:42:15 BoogieIcfgContainer [2023-02-18 15:42:15,998 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-18 15:42:15,998 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 15:42:15,998 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 15:42:15,998 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 15:42:15,999 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:42:13" (3/4) ... [2023-02-18 15:42:16,001 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-18 15:42:16,007 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2023-02-18 15:42:16,007 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-02-18 15:42:16,007 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-18 15:42:16,007 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-18 15:42:16,029 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-18 15:42:16,029 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 15:42:16,029 INFO L158 Benchmark]: Toolchain (without parser) took 3228.39ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 102.5MB in the beginning and 89.5MB in the end (delta: 13.0MB). Peak memory consumption was 41.5MB. Max. memory is 16.1GB. [2023-02-18 15:42:16,029 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 96.5MB. Free memory is still 48.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 15:42:16,029 INFO L158 Benchmark]: CACSL2BoogieTranslator took 138.33ms. Allocated memory is still 132.1MB. Free memory was 102.0MB in the beginning and 92.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 15:42:16,030 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.08ms. Allocated memory is still 132.1MB. Free memory was 91.7MB in the beginning and 90.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 15:42:16,030 INFO L158 Benchmark]: Boogie Preprocessor took 11.14ms. Allocated memory is still 132.1MB. Free memory was 90.6MB in the beginning and 89.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 15:42:16,030 INFO L158 Benchmark]: RCFGBuilder took 162.99ms. Allocated memory is still 132.1MB. Free memory was 89.5MB in the beginning and 80.1MB in the end (delta: 9.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-18 15:42:16,030 INFO L158 Benchmark]: TraceAbstraction took 2861.90ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 79.1MB in the beginning and 92.6MB in the end (delta: -13.6MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. [2023-02-18 15:42:16,030 INFO L158 Benchmark]: Witness Printer took 30.56ms. Allocated memory is still 159.4MB. Free memory was 92.6MB in the beginning and 89.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 15:42:16,031 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 96.5MB. Free memory is still 48.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 138.33ms. Allocated memory is still 132.1MB. Free memory was 102.0MB in the beginning and 92.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.08ms. Allocated memory is still 132.1MB. Free memory was 91.7MB in the beginning and 90.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 11.14ms. Allocated memory is still 132.1MB. Free memory was 90.6MB in the beginning and 89.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 162.99ms. Allocated memory is still 132.1MB. Free memory was 89.5MB in the beginning and 80.1MB in the end (delta: 9.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2861.90ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 79.1MB in the beginning and 92.6MB in the end (delta: -13.6MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. * Witness Printer took 30.56ms. Allocated memory is still 159.4MB. Free memory was 92.6MB in the beginning and 89.5MB in the end (delta: 3.1MB). 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 - PositiveResult [Line: 19]: 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, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.8s, OverallIterations: 5, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 72 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 72 mSDsluCounter, 113 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 76 mSDsCounter, 53 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 446 IncrementalHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 53 mSolverCounterUnsat, 37 mSDtfsCounter, 446 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 54 SyntacticMatches, 10 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, InterpolantAutomatonStates: 56, 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, 5 MinimizatonAttempts, 16 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 12 NumberOfFragments, 1255 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 138 ConstructedInterpolants, 0 QuantifiedInterpolants, 2380 SizeOfPredicates, 12 NumberOfNonLiveVariables, 164 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 22/123 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: 29]: Loop Invariant Derived loop invariant: (((((((((((((n <= 1 && ((0 == i % 2 && (0 == i % 2 || !(i < 0))) || (((i + 1 < i / 2 * 2 + 2 || i + 1 < n * 2 + 2) || i + 1 < 0) && ((((i + 1) / 2 < 0 || n + -1 < 0) || n * 2 + -2 < i + 1) || (i + 1) / 2 * 2 < i + 1)))) && i + -1 <= 1) && i + -1 == 1) && n + -1 == 0) && (((0 == (i + 1) % 2 || !(i + 1 < 0)) && 0 == (i + 1) % 2) || ((((i / 2 + 1 < 0 || 1 + n + -1 < 0) || (1 + n) * 2 + -2 < i + 1 + 1) || (i / 2 + 1) * 2 < i + 1 + 1) && ((i + 1 + 1 < 0 || i + 1 + 1 < (i + 1) / 2 * 2 + 2) || i + 1 + 1 < (1 + n) * 2 + 2)))) && 0 <= n + -1) && ((n == k || k < 0) || i + 1 < k * 2)) && 1 < 2 * k) || (((i <= 2 * n && (((((((0 == i % 2 && (0 == i % 2 || !(i < 0))) || (((i + 1 < i / 2 * 2 + 2 || i + 1 < n * 2 + 2) || i + 1 < 0) && ((((i + 1) / 2 < 0 || n + -1 < 0) || n * 2 + -2 < i + 1) || (i + 1) / 2 * 2 < i + 1))) && i + -1 <= 1) && n + -1 == 0) && 1 < 2 * k) || (((((((!(k + -1 * n + 1 <= 0) || n <= k) && (k + -1 * n + 1 <= 0 || i <= 2 * n + -1)) && i + -1 <= 0) && 0 <= 2 * k + -1) || (i + -1 <= 0 && 0 <= 2 * k + -1)) || i < 2 * k) && ((0 == i % 2 && (0 == i % 2 || !(i < 0))) || (((i + 1 < i / 2 * 2 + 2 || i + 1 < n * 2 + 2) || i + 1 < 0) && ((((i + 1) / 2 < 0 || n + -1 < 0) || n * 2 + -2 < i + 1) || (i + 1) / 2 * 2 < i + 1))))) || (((0 == i % 2 && (0 == i % 2 || !(i < 0))) || (((i + 1 < i / 2 * 2 + 2 || i + 1 < n * 2 + 2) || i + 1 < 0) && ((((i + 1) / 2 < 0 || n + -1 < 0) || n * 2 + -2 < i + 1) || (i + 1) / 2 * 2 < i + 1))) && ((n == k || k < 0) || i + 1 < k * 2)))) && 2 * n <= i) && ((n == k || k < 0) || i + 1 < k * 2))) || ((((n <= 1 && ((((((!(k + -1 * n + 1 <= 0) || n <= k) && (k + -1 * n + 1 <= 0 || i <= 2 * n + -1)) && i + -1 <= 0) && 0 <= 2 * k + -1) || (i + -1 <= 0 && 0 <= 2 * k + -1)) || i < 2 * k)) && n + -1 == 0) && 0 <= n + -1) && i + -1 == 0)) || ((((((0 == i % 2 && (0 == i % 2 || !(i < 0))) || (((i + 1 < i / 2 * 2 + 2 || i + 1 < n * 2 + 2) || i + 1 < 0) && ((((i + 1) / 2 < 0 || n + -1 < 0) || n * 2 + -2 < i + 1) || (i + 1) / 2 * 2 < i + 1))) && i <= 2 * n) && (((n == k || (0 == i % 2 && (0 == i % 2 || !(i < 0)))) || k < 0) || i + 1 < k * 2)) && 2 * n <= i) && ((n == k || k < 0) || i + 1 < k * 2))) || ((((((((!(k + -1 * n + 1 <= 0) || n <= k) && (k + -1 * n + 1 <= 0 || i <= 2 * n + -1)) && i + -1 <= 0) && 0 <= 2 * k + -1) || (i + -1 <= 0 && 0 <= 2 * k + -1)) || i < 2 * k) && i <= 2 * n + -1) && 2 * n <= i + 1)) || (((((k == 0 || i == 0) && (!(k == 0) || (0 == k && k == n))) || ((k == 0 || k <= 0) && (!(k == 0) || (0 == k && k == n)))) && n == 0) && i == 0)) || (((n + -1 <= 1 && (((((((0 == i % 2 && (0 == i % 2 || !(i < 0))) || (((i + 1 < i / 2 * 2 + 2 || i + 1 < n * 2 + 2) || i + 1 < 0) && ((((i + 1) / 2 < 0 || n + -1 < 0) || n * 2 + -2 < i + 1) || (i + 1) / 2 * 2 < i + 1))) && i + -1 <= 1) && n + -1 == 0) && 1 < 2 * k) || (((((((!(k + -1 * n + 1 <= 0) || n <= k) && (k + -1 * n + 1 <= 0 || i <= 2 * n + -1)) && i + -1 <= 0) && 0 <= 2 * k + -1) || (i + -1 <= 0 && 0 <= 2 * k + -1)) || i < 2 * k) && ((0 == i % 2 && (0 == i % 2 || !(i < 0))) || (((i + 1 < i / 2 * 2 + 2 || i + 1 < n * 2 + 2) || i + 1 < 0) && ((((i + 1) / 2 < 0 || n + -1 < 0) || n * 2 + -2 < i + 1) || (i + 1) / 2 * 2 < i + 1))))) || (((0 == i % 2 && (0 == i % 2 || !(i < 0))) || (((i + 1 < i / 2 * 2 + 2 || i + 1 < n * 2 + 2) || i + 1 < 0) && ((((i + 1) / 2 < 0 || n + -1 < 0) || n * 2 + -2 < i + 1) || (i + 1) / 2 * 2 < i + 1))) && ((n == k || k < 0) || i + 1 < k * 2)))) && 0 <= n + -1 + -1) && i + -1 + -1 == 1) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2023-02-18 15:42:16,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE