/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/loop-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:04:58,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:04:58,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:04:58,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:04:58,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:04:58,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:04:58,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:04:58,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:04:58,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:04:58,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:04:58,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:04:58,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:04:58,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:04:58,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:04:58,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:04:58,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:04:58,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:04:58,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:04:58,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:04:58,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:04:58,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:04:58,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:04:58,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:04:58,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:04:58,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 22:04:58,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 22:04:58,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 22:04:58,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 22:04:58,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 22:04:58,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 22:04:58,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:04:58,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:04:58,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:04:58,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:04:58,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:04:58,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:04:58,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:04:58,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:04:58,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:04:58,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:04:58,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:04:58,813 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 22:04:58,836 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:04:58,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:04:58,836 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:04:58,836 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:04:58,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:04:58,837 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:04:58,837 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:04:58,837 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:04:58,837 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:04:58,837 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:04:58,838 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:04:58,838 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:04:58,838 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:04:58,838 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:04:58,838 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:04:58,838 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:04:58,838 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:04:58,838 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:04:58,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:04:58,839 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:04:58,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:04:58,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:04:58,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:04:58,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:04:58,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:04:58,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:04:58,840 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:04:58,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:04:58,840 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:04:58,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:04:58,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:04:58,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:04:58,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:04:58,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:04:58,841 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:04:58,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:04:58,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:04:58,841 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:04:58,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:04:58,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:04:58,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:04:58,841 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:04:59,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:04:59,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:04:59,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:04:59,051 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:04:59,052 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:04:59,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/nested_1-1.c [2023-04-02 22:05:00,169 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:05:00,328 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:05:00,329 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-1.c [2023-04-02 22:05:00,332 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e27e1326/74c174b04baf4c868adfff1d6bf57c4e/FLAG46a8b0b76 [2023-04-02 22:05:00,346 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e27e1326/74c174b04baf4c868adfff1d6bf57c4e [2023-04-02 22:05:00,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:05:00,349 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:05:00,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:05:00,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:05:00,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:05:00,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:05:00" (1/1) ... [2023-04-02 22:05:00,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f41eca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:05:00, skipping insertion in model container [2023-04-02 22:05:00,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:05:00" (1/1) ... [2023-04-02 22:05:00,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:05:00,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:05:00,498 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-1.c[322,335] [2023-04-02 22:05:00,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:05:00,518 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:05:00,527 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-1.c[322,335] [2023-04-02 22:05:00,530 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:05:00,540 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:05:00,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:05:00 WrapperNode [2023-04-02 22:05:00,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:05:00,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:05:00,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:05:00,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:05:00,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:05:00" (1/1) ... [2023-04-02 22:05:00,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:05:00" (1/1) ... [2023-04-02 22:05:00,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:05:00" (1/1) ... [2023-04-02 22:05:00,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:05:00" (1/1) ... [2023-04-02 22:05:00,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:05:00" (1/1) ... [2023-04-02 22:05:00,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:05:00" (1/1) ... [2023-04-02 22:05:00,564 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:05:00" (1/1) ... [2023-04-02 22:05:00,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:05:00" (1/1) ... [2023-04-02 22:05:00,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:05:00,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:05:00,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:05:00,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:05:00,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:05:00" (1/1) ... [2023-04-02 22:05:00,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:05:00,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:05:00,595 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) [2023-04-02 22:05:00,613 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 [2023-04-02 22:05:00,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:05:00,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:05:00,625 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:05:00,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:05:00,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:05:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:05:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:05:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:05:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:05:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:05:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:05:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:05:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:05:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:05:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:05:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:05:00,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:05:00,678 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:05:00,679 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:05:00,854 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:05:00,882 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:05:00,882 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 22:05:00,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:05:00 BoogieIcfgContainer [2023-04-02 22:05:00,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:05:00,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:05:00,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:05:00,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:05:00,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:05:00" (1/3) ... [2023-04-02 22:05:00,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e818211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:05:00, skipping insertion in model container [2023-04-02 22:05:00,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:05:00" (2/3) ... [2023-04-02 22:05:00,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e818211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:05:00, skipping insertion in model container [2023-04-02 22:05:00,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:05:00" (3/3) ... [2023-04-02 22:05:00,890 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2023-04-02 22:05:00,901 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:05:00,901 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:05:00,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:05:00,960 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=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1fc362c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:05:00,960 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:05:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:05:00,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-02 22:05:00,968 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:05:00,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:05:00,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:05:00,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:05:00,977 INFO L85 PathProgramCache]: Analyzing trace with hash 952532715, now seen corresponding path program 1 times [2023-04-02 22:05:00,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:05:00,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422827041] [2023-04-02 22:05:00,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:05:00,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:05:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:05:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:05:01,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:05:01,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422827041] [2023-04-02 22:05:01,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422827041] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:05:01,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:05:01,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 22:05:01,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641436436] [2023-04-02 22:05:01,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:05:01,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 22:05:01,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:05:01,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 22:05:01,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:05:01,167 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:01,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:05:01,190 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-04-02 22:05:01,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 22:05:01,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-02 22:05:01,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:05:01,196 INFO L225 Difference]: With dead ends: 31 [2023-04-02 22:05:01,196 INFO L226 Difference]: Without dead ends: 14 [2023-04-02 22:05:01,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:05:01,200 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:05:01,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:05:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-04-02 22:05:01,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-04-02 22:05:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-04-02 22:05:01,222 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2023-04-02 22:05:01,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:05:01,222 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-04-02 22:05:01,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:01,223 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-04-02 22:05:01,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 22:05:01,223 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:05:01,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:05:01,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 22:05:01,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:05:01,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:05:01,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1380179267, now seen corresponding path program 1 times [2023-04-02 22:05:01,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:05:01,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337146824] [2023-04-02 22:05:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:05:01,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:05:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:05:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:05:01,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:05:01,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337146824] [2023-04-02 22:05:01,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337146824] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:05:01,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:05:01,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 22:05:01,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379268315] [2023-04-02 22:05:01,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:05:01,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 22:05:01,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:05:01,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 22:05:01,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:05:01,324 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:05:01,354 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-04-02 22:05:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 22:05:01,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 22:05:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:05:01,355 INFO L225 Difference]: With dead ends: 21 [2023-04-02 22:05:01,355 INFO L226 Difference]: Without dead ends: 14 [2023-04-02 22:05:01,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:05:01,356 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:05:01,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:05:01,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-04-02 22:05:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-04-02 22:05:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:01,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-04-02 22:05:01,359 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2023-04-02 22:05:01,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:05:01,360 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-04-02 22:05:01,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:01,360 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-04-02 22:05:01,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 22:05:01,360 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:05:01,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:05:01,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 22:05:01,361 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:05:01,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:05:01,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1845529672, now seen corresponding path program 1 times [2023-04-02 22:05:01,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:05:01,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604544671] [2023-04-02 22:05:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:05:01,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:05:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:05:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:05:01,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:05:01,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604544671] [2023-04-02 22:05:01,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604544671] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:05:01,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822014338] [2023-04-02 22:05:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:05:01,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:05:01,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:05:01,518 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) [2023-04-02 22:05:01,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 22:05:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:05:01,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 22:05:01,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:05:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 22:05:01,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:05:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 22:05:01,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822014338] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:05:01,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1489587636] [2023-04-02 22:05:01,753 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:05:01,753 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:05:01,755 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:05:01,775 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:05:01,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:05:01,874 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:05:02,018 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-02 22:05:02,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:05:02,041 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:05:02,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '234#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:05:02,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:05:02,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:05:02,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-04-02 22:05:02,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699125596] [2023-04-02 22:05:02,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:05:02,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 22:05:02,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:05:02,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 22:05:02,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-04-02 22:05:02,183 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:02,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:05:02,326 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-04-02 22:05:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 22:05:02,327 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-02 22:05:02,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:05:02,327 INFO L225 Difference]: With dead ends: 35 [2023-04-02 22:05:02,327 INFO L226 Difference]: Without dead ends: 27 [2023-04-02 22:05:02,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2023-04-02 22:05:02,329 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:05:02,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:05:02,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-02 22:05:02,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-02 22:05:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-04-02 22:05:02,334 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 13 [2023-04-02 22:05:02,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:05:02,334 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-04-02 22:05:02,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-04-02 22:05:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 22:05:02,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:05:02,335 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:05:02,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 22:05:02,542 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 [2023-04-02 22:05:02,542 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:05:02,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:05:02,543 INFO L85 PathProgramCache]: Analyzing trace with hash 530827979, now seen corresponding path program 2 times [2023-04-02 22:05:02,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:05:02,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763034247] [2023-04-02 22:05:02,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:05:02,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:05:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:05:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-02 22:05:02,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:05:02,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763034247] [2023-04-02 22:05:02,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763034247] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:05:02,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243704471] [2023-04-02 22:05:02,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:05:02,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:05:02,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:05:02,649 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) [2023-04-02 22:05:02,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 22:05:02,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 22:05:02,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:05:02,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 22:05:02,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:05:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-02 22:05:02,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:05:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-02 22:05:02,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243704471] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:05:02,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1790110558] [2023-04-02 22:05:02,761 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:05:02,761 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:05:02,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:05:02,761 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:05:02,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:05:02,792 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:05:02,885 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-02 22:05:02,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:05:02,900 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:05:03,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '536#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:05:03,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:05:03,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:05:03,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-04-02 22:05:03,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566155320] [2023-04-02 22:05:03,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:05:03,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 22:05:03,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:05:03,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 22:05:03,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-04-02 22:05:03,025 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:03,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:05:03,099 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2023-04-02 22:05:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 22:05:03,100 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-04-02 22:05:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:05:03,100 INFO L225 Difference]: With dead ends: 61 [2023-04-02 22:05:03,100 INFO L226 Difference]: Without dead ends: 43 [2023-04-02 22:05:03,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-04-02 22:05:03,101 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:05:03,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:05:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-02 22:05:03,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-04-02 22:05:03,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:03,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2023-04-02 22:05:03,118 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 26 [2023-04-02 22:05:03,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:05:03,118 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2023-04-02 22:05:03,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:03,118 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2023-04-02 22:05:03,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 22:05:03,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:05:03,119 INFO L195 NwaCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:05:03,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 22:05:03,325 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 [2023-04-02 22:05:03,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:05:03,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:05:03,326 INFO L85 PathProgramCache]: Analyzing trace with hash 555579339, now seen corresponding path program 3 times [2023-04-02 22:05:03,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:05:03,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271260512] [2023-04-02 22:05:03,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:05:03,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:05:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:05:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2023-04-02 22:05:03,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:05:03,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271260512] [2023-04-02 22:05:03,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271260512] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:05:03,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355287509] [2023-04-02 22:05:03,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:05:03,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:05:03,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:05:03,543 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) [2023-04-02 22:05:03,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 22:05:03,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:05:03,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:05:03,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 22:05:03,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:05:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-02 22:05:03,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:05:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 10 proven. 314 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-02 22:05:04,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355287509] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:05:04,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1631491725] [2023-04-02 22:05:04,029 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:05:04,029 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:05:04,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:05:04,030 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:05:04,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:05:04,049 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:05:04,106 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-02 22:05:04,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:05:04,116 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:05:04,344 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1023#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:05:04,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:05:04,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:05:04,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 29 [2023-04-02 22:05:04,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691376608] [2023-04-02 22:05:04,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:05:04,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-02 22:05:04,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:05:04,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-02 22:05:04,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 22:05:04,347 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:05:10,793 INFO L93 Difference]: Finished difference Result 143 states and 184 transitions. [2023-04-02 22:05:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-04-02 22:05:10,794 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-04-02 22:05:10,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:05:10,796 INFO L225 Difference]: With dead ends: 143 [2023-04-02 22:05:10,796 INFO L226 Difference]: Without dead ends: 113 [2023-04-02 22:05:10,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5367 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2727, Invalid=12279, Unknown=0, NotChecked=0, Total=15006 [2023-04-02 22:05:10,801 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 69 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 22:05:10,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 80 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 22:05:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-02 22:05:10,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-04-02 22:05:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.212962962962963) internal successors, (131), 108 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2023-04-02 22:05:10,844 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 42 [2023-04-02 22:05:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:05:10,844 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2023-04-02 22:05:10,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2023-04-02 22:05:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-02 22:05:10,846 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:05:10,846 INFO L195 NwaCegarLoop]: trace histogram [70, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:05:10,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 22:05:11,050 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 [2023-04-02 22:05:11,051 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:05:11,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:05:11,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1232245771, now seen corresponding path program 4 times [2023-04-02 22:05:11,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:05:11,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006540264] [2023-04-02 22:05:11,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:05:11,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:05:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:05:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 586 proven. 28 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2023-04-02 22:05:11,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:05:11,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006540264] [2023-04-02 22:05:11,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006540264] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:05:11,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901203100] [2023-04-02 22:05:11,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:05:11,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:05:11,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:05:11,359 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) [2023-04-02 22:05:11,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 22:05:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:05:11,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 22:05:11,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:05:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 586 proven. 28 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2023-04-02 22:05:11,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:05:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 586 proven. 28 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2023-04-02 22:05:11,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901203100] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:05:11,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [549404778] [2023-04-02 22:05:11,596 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 22:05:11,596 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:05:11,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:05:11,597 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:05:11,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:05:11,611 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:05:11,651 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-02 22:05:11,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:05:11,663 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:05:11,816 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2320#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:05:11,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:05:11,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:05:11,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-04-02 22:05:11,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503198949] [2023-04-02 22:05:11,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:05:11,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 22:05:11,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:05:11,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 22:05:11,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2023-04-02 22:05:11,818 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:05:11,896 INFO L93 Difference]: Finished difference Result 230 states and 291 transitions. [2023-04-02 22:05:11,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 22:05:11,897 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2023-04-02 22:05:11,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:05:11,898 INFO L225 Difference]: With dead ends: 230 [2023-04-02 22:05:11,898 INFO L226 Difference]: Without dead ends: 131 [2023-04-02 22:05:11,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2023-04-02 22:05:11,899 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:05:11,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:05:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-02 22:05:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-04-02 22:05:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0873015873015872) internal successors, (137), 126 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2023-04-02 22:05:11,941 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 100 [2023-04-02 22:05:11,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:05:11,943 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2023-04-02 22:05:11,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:11,943 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2023-04-02 22:05:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-02 22:05:11,949 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:05:11,949 INFO L195 NwaCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:05:11,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 22:05:12,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:05:12,155 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:05:12,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:05:12,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1565162085, now seen corresponding path program 5 times [2023-04-02 22:05:12,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:05:12,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942002872] [2023-04-02 22:05:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:05:12,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:05:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:05:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-04-02 22:05:12,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:05:12,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942002872] [2023-04-02 22:05:12,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942002872] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:05:12,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956713028] [2023-04-02 22:05:12,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:05:12,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:05:12,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:05:12,619 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:05:12,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 22:05:12,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-04-02 22:05:12,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:05:12,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 22:05:12,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:05:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 1099 proven. 0 refuted. 0 times theorem prover too weak. 4951 trivial. 0 not checked. [2023-04-02 22:05:12,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:05:12,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956713028] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:05:12,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 22:05:12,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2023-04-02 22:05:12,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156347187] [2023-04-02 22:05:12,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:05:12,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 22:05:12,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:05:12,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 22:05:12,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-04-02 22:05:12,954 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:13,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:05:13,075 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2023-04-02 22:05:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 22:05:13,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2023-04-02 22:05:13,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:05:13,076 INFO L225 Difference]: With dead ends: 131 [2023-04-02 22:05:13,076 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 22:05:13,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-04-02 22:05:13,081 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:05:13,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:05:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 22:05:13,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 22:05:13,082 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) [2023-04-02 22:05:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 22:05:13,083 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 130 [2023-04-02 22:05:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:05:13,083 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 22:05:13,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:05:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 22:05:13,083 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 22:05:13,085 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 22:05:13,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 22:05:13,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:05:13,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 22:05:15,623 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2023-04-02 22:05:15,623 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 3) no Hoare annotation was computed. [2023-04-02 22:05:15,623 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 22:05:15,623 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 22:05:15,623 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 22:05:15,623 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-04-02 22:05:15,623 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 22:05:15,623 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 22:05:15,623 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 12 27) no Hoare annotation was computed. [2023-04-02 22:05:15,624 INFO L895 garLoopResultBuilder]: At program point L19-2(lines 19 21) the Hoare annotation is: (let ((.cse3 (mod main_~y~0 4294967296)) (.cse0 (< (mod main_~x~0 4294967296) 268435455)) (.cse1 (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455))) (or (= main_~x~0 0) (and .cse0 .cse1 (<= 7 main_~y~0) (<= main_~y~0 7)) (let ((.cse2 (< (mod (+ main_~x~0 4) 4294967296) 268435455))) (and .cse0 .cse1 (or .cse2 (<= 10 (mod (+ main_~y~0 4) 4294967296))) (or .cse2 (<= 10 .cse3)))) (and .cse0 (<= 2 main_~y~0) (<= main_~y~0 2) .cse1) (and .cse0 .cse1 (<= 1 main_~y~0) (<= main_~y~0 1)) (and .cse0 .cse1 (< .cse3 10) (<= 10 (mod (+ main_~y~0 2) 4294967296))) (and .cse0 .cse1 (= main_~y~0 0)) (and .cse0 (<= main_~y~0 6) .cse1 (<= 6 main_~y~0)) (and .cse0 (<= main_~y~0 3) (<= 3 main_~y~0) .cse1) (and .cse0 (<= 5 main_~y~0) .cse1 (<= main_~y~0 5)) (and .cse0 (<= main_~y~0 4) .cse1 (<= 4 main_~y~0)))) [2023-04-02 22:05:15,624 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 12 27) no Hoare annotation was computed. [2023-04-02 22:05:15,624 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 12 27) the Hoare annotation is: true [2023-04-02 22:05:15,624 INFO L895 garLoopResultBuilder]: At program point L16-2(lines 16 24) the Hoare annotation is: (or (and (= main_~x~0 0) (= main_~y~0 0)) (and (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (or (< (mod (+ main_~x~0 4) 4294967296) 268435455) (<= 10 (mod main_~y~0 4294967296))))) [2023-04-02 22:05:15,624 INFO L895 garLoopResultBuilder]: At program point L16-3(lines 16 24) the Hoare annotation is: (and (<= 268435455 (mod main_~x~0 4294967296)) (<= 10 (mod main_~y~0 4294967296)) (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455)) [2023-04-02 22:05:15,624 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2023-04-02 22:05:15,624 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 5 10) the Hoare annotation is: true [2023-04-02 22:05:15,624 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2023-04-02 22:05:15,624 INFO L899 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2023-04-02 22:05:15,624 INFO L899 garLoopResultBuilder]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2023-04-02 22:05:15,624 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2023-04-02 22:05:15,626 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1, 1] [2023-04-02 22:05:15,628 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 22:05:15,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 10:05:15 BoogieIcfgContainer [2023-04-02 22:05:15,638 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 22:05:15,643 INFO L158 Benchmark]: Toolchain (without parser) took 15292.02ms. Allocated memory was 232.8MB in the beginning and 390.1MB in the end (delta: 157.3MB). Free memory was 184.9MB in the beginning and 226.1MB in the end (delta: -41.2MB). Peak memory consumption was 214.2MB. Max. memory is 8.0GB. [2023-04-02 22:05:15,643 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 184.5MB. Free memory is still 134.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 22:05:15,643 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.54ms. Allocated memory is still 232.8MB. Free memory was 184.5MB in the beginning and 174.6MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-04-02 22:05:15,643 INFO L158 Benchmark]: Boogie Preprocessor took 27.44ms. Allocated memory is still 232.8MB. Free memory was 174.6MB in the beginning and 173.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-02 22:05:15,644 INFO L158 Benchmark]: RCFGBuilder took 314.15ms. Allocated memory is still 232.8MB. Free memory was 173.3MB in the beginning and 162.1MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-02 22:05:15,644 INFO L158 Benchmark]: TraceAbstraction took 14752.92ms. Allocated memory was 232.8MB in the beginning and 390.1MB in the end (delta: 157.3MB). Free memory was 161.4MB in the beginning and 226.1MB in the end (delta: -64.6MB). Peak memory consumption was 190.1MB. Max. memory is 8.0GB. [2023-04-02 22:05:15,645 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 184.5MB. Free memory is still 134.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 189.54ms. Allocated memory is still 232.8MB. Free memory was 184.5MB in the beginning and 174.6MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.44ms. Allocated memory is still 232.8MB. Free memory was 174.6MB in the beginning and 173.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 314.15ms. Allocated memory is still 232.8MB. Free memory was 173.3MB in the beginning and 162.1MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 14752.92ms. Allocated memory was 232.8MB in the beginning and 390.1MB in the end (delta: 157.3MB). Free memory was 161.4MB in the beginning and 226.1MB in the end (delta: -64.6MB). Peak memory consumption was 190.1MB. Max. memory is 8.0GB. * 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: 7]: 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 5 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14.7s, OverallIterations: 7, TraceHistogramMax: 100, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 7.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 90 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 90 mSDsluCounter, 280 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 215 mSDsCounter, 45 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 888 IncrementalHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 45 mSolverCounterUnsat, 65 mSDtfsCounter, 888 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 818 GetRequests, 609 SyntacticMatches, 2 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5658 ImplicationChecksByTransitivity, 7.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=6, InterpolantAutomatonStates: 147, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 136 NumberOfFragments, 271 HoareAnnotationTreeSize, 14 FomulaSimplifications, 1456 FormulaSimplificationTreeSizeReduction, 1.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2042 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 644 NumberOfCodeBlocks, 540 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 809 ConstructedInterpolants, 2 QuantifiedInterpolants, 2211 SizeOfPredicates, 4 NumberOfNonLiveVariables, 731 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 16889/23144 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: 16]: Loop Invariant Derived loop invariant: (x == 0 && y == 0) || ((x + 4294967295) % 4294967296 < 268435455 && ((x + 4) % 4294967296 < 268435455 || 10 <= y % 4294967296)) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (((((((((x == 0 || (((x % 4294967296 < 268435455 && (x + 4294967295) % 4294967296 < 268435455) && 7 <= y) && y <= 7)) || (((x % 4294967296 < 268435455 && (x + 4294967295) % 4294967296 < 268435455) && ((x + 4) % 4294967296 < 268435455 || 10 <= (y + 4) % 4294967296)) && ((x + 4) % 4294967296 < 268435455 || 10 <= y % 4294967296))) || (((x % 4294967296 < 268435455 && 2 <= y) && y <= 2) && (x + 4294967295) % 4294967296 < 268435455)) || (((x % 4294967296 < 268435455 && (x + 4294967295) % 4294967296 < 268435455) && 1 <= y) && y <= 1)) || (((x % 4294967296 < 268435455 && (x + 4294967295) % 4294967296 < 268435455) && y % 4294967296 < 10) && 10 <= (y + 2) % 4294967296)) || ((x % 4294967296 < 268435455 && (x + 4294967295) % 4294967296 < 268435455) && y == 0)) || (((x % 4294967296 < 268435455 && y <= 6) && (x + 4294967295) % 4294967296 < 268435455) && 6 <= y)) || (((x % 4294967296 < 268435455 && y <= 3) && 3 <= y) && (x + 4294967295) % 4294967296 < 268435455)) || (((x % 4294967296 < 268435455 && 5 <= y) && (x + 4294967295) % 4294967296 < 268435455) && y <= 5)) || (((x % 4294967296 < 268435455 && y <= 4) && (x + 4294967295) % 4294967296 < 268435455) && 4 <= y) RESULT: Ultimate proved your program to be correct! [2023-04-02 22:05:15,670 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...