/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/array-lopstr16/sum_multi_array.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:21:03,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:21:03,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:21:03,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:21:03,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:21:03,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:21:03,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:21:03,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:21:03,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:21:03,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:21:03,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:21:03,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:21:03,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:21:03,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:21:03,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:21:03,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:21:03,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:21:03,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:21:03,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:21:03,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:21:03,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:21:03,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:21:03,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:21:03,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:21:03,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 15:21:03,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 15:21:03,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 15:21:03,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 15:21:03,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 15:21:03,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 15:21:03,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:21:03,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:21:03,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:21:03,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:21:03,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:21:03,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:21:03,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:21:03,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:21:03,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:21:03,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:21:03,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:21:03,455 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 15:21:03,469 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:21:03,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:21:03,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:21:03,469 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:21:03,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:21:03,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:21:03,470 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:21:03,470 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:21:03,470 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:21:03,470 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:21:03,471 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:21:03,471 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:21:03,471 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:21:03,471 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:21:03,471 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:21:03,471 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:21:03,471 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:21:03,471 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:21:03,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:21:03,472 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:21:03,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:21:03,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:21:03,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:21:03,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:21:03,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:21:03,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:21:03,473 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:21:03,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:21:03,473 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:21:03,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:21:03,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:21:03,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:21:03,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:21:03,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:21:03,474 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:21:03,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:21:03,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:21:03,474 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:21:03,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:21:03,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:21:03,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:21:03,475 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:21:03,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:21:03,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:21:03,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:21:03,670 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:21:03,671 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:21:03,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/sum_multi_array.i [2023-04-02 15:21:04,596 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:21:04,771 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:21:04,771 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/sum_multi_array.i [2023-04-02 15:21:04,776 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578bd5ceb/a146764913634a5f8924a9f3dc182fd7/FLAG488dabf7c [2023-04-02 15:21:04,785 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578bd5ceb/a146764913634a5f8924a9f3dc182fd7 [2023-04-02 15:21:04,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:21:04,788 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:21:04,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:21:04,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:21:04,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:21:04,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:21:04" (1/1) ... [2023-04-02 15:21:04,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d240099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:21:04, skipping insertion in model container [2023-04-02 15:21:04,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:21:04" (1/1) ... [2023-04-02 15:21:04,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:21:04,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:21:04,928 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/array-lopstr16/sum_multi_array.i[808,821] [2023-04-02 15:21:04,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:21:14,806 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:21:14,830 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/array-lopstr16/sum_multi_array.i[808,821] [2023-04-02 15:21:14,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:21:14,865 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:21:14,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:21:14 WrapperNode [2023-04-02 15:21:14,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:21:14,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:21:14,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:21:14,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:21:14,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:21:14" (1/1) ... [2023-04-02 15:21:14,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:21:14" (1/1) ... [2023-04-02 15:21:14,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:21:14" (1/1) ... [2023-04-02 15:21:14,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:21:14" (1/1) ... [2023-04-02 15:21:14,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:21:14" (1/1) ... [2023-04-02 15:21:14,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:21:14" (1/1) ... [2023-04-02 15:21:14,906 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:21:14" (1/1) ... [2023-04-02 15:21:14,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:21:14" (1/1) ... [2023-04-02 15:21:14,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:21:14,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:21:14,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:21:14,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:21:14,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:21:14" (1/1) ... [2023-04-02 15:21:14,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:21:14,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:21:15,006 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 15:21:15,019 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 15:21:15,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:21:15,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:21:15,065 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:21:15,065 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 15:21:15,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:21:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:21:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:21:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 15:21:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 15:21:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:21:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:21:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 15:21:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 15:21:15,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:21:15,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:21:15,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:21:15,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:21:15,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:21:15,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:21:15,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:21:15,149 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:21:15,151 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:21:15,362 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:21:15,400 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:21:15,400 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 15:21:15,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:21:15 BoogieIcfgContainer [2023-04-02 15:21:15,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:21:15,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:21:15,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:21:15,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:21:15,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:21:04" (1/3) ... [2023-04-02 15:21:15,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff70d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:21:15, skipping insertion in model container [2023-04-02 15:21:15,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:21:14" (2/3) ... [2023-04-02 15:21:15,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff70d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:21:15, skipping insertion in model container [2023-04-02 15:21:15,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:21:15" (3/3) ... [2023-04-02 15:21:15,411 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_multi_array.i [2023-04-02 15:21:15,422 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:21:15,422 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:21:15,473 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:21:15,478 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;@310533de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:21:15,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:21:15,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 15:21:15,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 15:21:15,485 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:21:15,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:21:15,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:21:15,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:21:15,489 INFO L85 PathProgramCache]: Analyzing trace with hash -182059322, now seen corresponding path program 1 times [2023-04-02 15:21:15,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:21:15,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297117550] [2023-04-02 15:21:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:21:15,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:21:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:21:15,801 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 15:21:15,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:21:15,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297117550] [2023-04-02 15:21:15,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297117550] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:21:15,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:21:15,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:21:15,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15260402] [2023-04-02 15:21:15,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:21:15,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:21:15,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:21:15,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:21:15,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:21:15,837 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 2.6666666666666665) 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 15:21:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:21:15,893 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2023-04-02 15:21:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:21:15,896 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 15:21:15,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:21:15,900 INFO L225 Difference]: With dead ends: 37 [2023-04-02 15:21:15,900 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 15:21:15,902 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 15:21:15,904 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:21:15,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:21:15,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 15:21:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-04-02 15:21:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:21:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-02 15:21:15,945 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2023-04-02 15:21:15,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:21:15,946 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-02 15:21:15,946 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 15:21:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-02 15:21:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 15:21:15,946 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:21:15,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:21:15,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 15:21:15,947 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:21:15,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:21:15,947 INFO L85 PathProgramCache]: Analyzing trace with hash -179635494, now seen corresponding path program 1 times [2023-04-02 15:21:15,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:21:15,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307131259] [2023-04-02 15:21:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:21:15,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:21:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:21:16,145 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 15:21:16,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:21:16,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307131259] [2023-04-02 15:21:16,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307131259] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:21:16,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861849253] [2023-04-02 15:21:16,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:21:16,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:21:16,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:21:16,185 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 15:21:16,230 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 15:21:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:21:16,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 15:21:16,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:21:16,390 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 15:21:16,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:21:16,430 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 15:21:16,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861849253] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:21:16,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [582140256] [2023-04-02 15:21:16,472 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 15:21:16,473 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:21:16,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:21:16,483 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:21:16,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:21:16,782 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2023-04-02 15:21:17,076 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 15:21:17,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-02 15:21:17,149 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:21:17,555 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '196#(and (= |~#c~0.offset| 0) (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| 5) 0) (+ (select (select |#memory_int| 3) 0) (select (select |#memory_int| 4) 0)))) (= |~#b~0.offset| 0) (= 5 |~#c~0.base|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#b~0.base| 4) (= |#NULL.base| 0))' at error location [2023-04-02 15:21:17,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:21:17,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:21:17,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 15:21:17,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722522182] [2023-04-02 15:21:17,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:21:17,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 15:21:17,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:21:17,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 15:21:17,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-04-02 15:21:17,558 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 15:21:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:21:17,615 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2023-04-02 15:21:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 15:21:17,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 14 [2023-04-02 15:21:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:21:17,617 INFO L225 Difference]: With dead ends: 45 [2023-04-02 15:21:17,617 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 15:21:17,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-04-02 15:21:17,620 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:21:17,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 38 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:21:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 15:21:17,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2023-04-02 15:21:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:21:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-02 15:21:17,629 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2023-04-02 15:21:17,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:21:17,629 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-02 15:21:17,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 15:21:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-02 15:21:17,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 15:21:17,631 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:21:17,631 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:21:17,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 15:21:17,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:21:17,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:21:17,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:21:17,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1639494726, now seen corresponding path program 2 times [2023-04-02 15:21:17,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:21:17,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270376023] [2023-04-02 15:21:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:21:17,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:21:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:21:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 15:21:18,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:21:18,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270376023] [2023-04-02 15:21:18,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270376023] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:21:18,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973948954] [2023-04-02 15:21:18,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:21:18,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:21:18,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:21:18,042 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 15:21:18,044 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 15:21:18,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 15:21:18,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:21:18,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 15:21:18,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:21:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 15:21:18,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:21:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 15:21:18,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973948954] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:21:18,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [208117864] [2023-04-02 15:21:18,251 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 15:21:18,251 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:21:18,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:21:18,251 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:21:18,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:21:18,397 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2023-04-02 15:21:18,544 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 15:21:18,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-02 15:21:18,592 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:21:19,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '451#(and (= |~#c~0.offset| 0) (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| 5) 0) (+ (select (select |#memory_int| 3) 0) (select (select |#memory_int| 4) 0)))) (= |~#b~0.offset| 0) (= 5 |~#c~0.base|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#b~0.base| 4) (= |#NULL.base| 0))' at error location [2023-04-02 15:21:19,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:21:19,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:21:19,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 15:21:19,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121996715] [2023-04-02 15:21:19,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:21:19,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 15:21:19,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:21:19,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 15:21:19,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-04-02 15:21:19,038 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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 15:21:19,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:21:19,175 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2023-04-02 15:21:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 15:21:19,175 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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 20 [2023-04-02 15:21:19,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:21:19,176 INFO L225 Difference]: With dead ends: 78 [2023-04-02 15:21:19,176 INFO L226 Difference]: Without dead ends: 64 [2023-04-02 15:21:19,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-04-02 15:21:19,177 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:21:19,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 56 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:21:19,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-02 15:21:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2023-04-02 15:21:19,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:21:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-04-02 15:21:19,197 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2023-04-02 15:21:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:21:19,197 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-04-02 15:21:19,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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 15:21:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-04-02 15:21:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 15:21:19,198 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:21:19,198 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:21:19,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 15:21:19,398 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,SelfDestructingSolverStorable2 [2023-04-02 15:21:19,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:21:19,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:21:19,399 INFO L85 PathProgramCache]: Analyzing trace with hash -823286650, now seen corresponding path program 3 times [2023-04-02 15:21:19,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:21:19,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947304783] [2023-04-02 15:21:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:21:19,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:21:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:21:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 15:21:19,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:21:19,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947304783] [2023-04-02 15:21:19,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947304783] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:21:19,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779700941] [2023-04-02 15:21:19,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:21:19,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:21:19,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:21:19,821 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 15:21:19,857 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 15:21:19,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:21:19,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:21:19,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 15:21:19,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:21:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 15:21:20,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:21:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 15:21:20,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779700941] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:21:20,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1726246055] [2023-04-02 15:21:20,261 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 15:21:20,261 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:21:20,261 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:21:20,261 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:21:20,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:21:20,349 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2023-04-02 15:21:20,477 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 15:21:20,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-02 15:21:20,520 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:21:20,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '874#(and (= |~#c~0.offset| 0) (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| 5) 0) (+ (select (select |#memory_int| 3) 0) (select (select |#memory_int| 4) 0)))) (= |~#b~0.offset| 0) (= 5 |~#c~0.base|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#b~0.base| 4) (= |#NULL.base| 0))' at error location [2023-04-02 15:21:20,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:21:20,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:21:20,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 15:21:20,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714842077] [2023-04-02 15:21:20,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:21:20,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 15:21:20,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:21:20,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 15:21:20,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=810, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 15:21:20,959 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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 15:21:21,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:21:21,272 INFO L93 Difference]: Finished difference Result 144 states and 192 transitions. [2023-04-02 15:21:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 15:21:21,273 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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 32 [2023-04-02 15:21:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:21:21,274 INFO L225 Difference]: With dead ends: 144 [2023-04-02 15:21:21,274 INFO L226 Difference]: Without dead ends: 124 [2023-04-02 15:21:21,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=810, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 15:21:21,275 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 15:21:21,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 38 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 15:21:21,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-04-02 15:21:21,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 60. [2023-04-02 15:21:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:21:21,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2023-04-02 15:21:21,295 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2023-04-02 15:21:21,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:21:21,296 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2023-04-02 15:21:21,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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 15:21:21,296 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2023-04-02 15:21:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 15:21:21,297 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:21:21,297 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:21:21,317 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 15:21:21,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:21:21,502 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:21:21,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:21:21,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1045185798, now seen corresponding path program 4 times [2023-04-02 15:21:21,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:21:21,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702849479] [2023-04-02 15:21:21,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:21:21,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:21:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:21:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 15:21:22,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:21:22,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702849479] [2023-04-02 15:21:22,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702849479] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:21:22,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545171358] [2023-04-02 15:21:22,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:21:22,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:21:22,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:21:22,151 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 15:21:22,180 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 15:21:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:21:22,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 15:21:22,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:21:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 15:21:22,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:21:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 15:21:23,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545171358] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:21:23,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [718606969] [2023-04-02 15:21:23,013 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 15:21:23,013 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:21:23,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:21:23,013 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:21:23,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:21:23,055 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2023-04-02 15:21:23,116 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 15:21:23,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-02 15:21:23,132 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:21:23,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1633#(and (= |~#c~0.offset| 0) (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| 5) 0) (+ (select (select |#memory_int| 3) 0) (select (select |#memory_int| 4) 0)))) (= |~#b~0.offset| 0) (= 5 |~#c~0.base|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#b~0.base| 4) (= |#NULL.base| 0))' at error location [2023-04-02 15:21:23,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:21:23,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:21:23,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-02 15:21:23,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17233982] [2023-04-02 15:21:23,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:21:23,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 15:21:23,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:21:23,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 15:21:23,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1304, Invalid=2118, Unknown=0, NotChecked=0, Total=3422 [2023-04-02 15:21:23,462 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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 15:21:23,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:21:23,930 INFO L93 Difference]: Finished difference Result 276 states and 372 transitions. [2023-04-02 15:21:23,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-02 15:21:23,931 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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 56 [2023-04-02 15:21:23,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:21:23,932 INFO L225 Difference]: With dead ends: 276 [2023-04-02 15:21:23,932 INFO L226 Difference]: Without dead ends: 244 [2023-04-02 15:21:23,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1304, Invalid=2118, Unknown=0, NotChecked=0, Total=3422 [2023-04-02 15:21:23,934 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 142 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 15:21:23,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 56 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 15:21:23,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-04-02 15:21:23,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 108. [2023-04-02 15:21:23,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 15:21:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2023-04-02 15:21:23,953 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 56 [2023-04-02 15:21:23,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:21:23,953 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2023-04-02 15:21:23,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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 15:21:23,953 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2023-04-02 15:21:23,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-02 15:21:23,954 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:21:23,954 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:21:23,977 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 15:21:24,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:21:24,165 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:21:24,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:21:24,166 INFO L85 PathProgramCache]: Analyzing trace with hash -348355066, now seen corresponding path program 5 times [2023-04-02 15:21:24,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:21:24,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542647537] [2023-04-02 15:21:24,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:21:24,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:21:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:21:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-04-02 15:21:26,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:21:26,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542647537] [2023-04-02 15:21:26,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542647537] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:21:26,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878907733] [2023-04-02 15:21:26,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:21:26,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:21:26,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:21:26,017 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 15:21:26,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process