/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/forester-heap/sll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:33:22,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:33:22,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:33:22,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:33:22,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:33:22,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:33:22,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:33:22,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:33:22,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:33:22,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:33:22,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:33:22,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 21:33:22,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 21:33:22,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 21:33:22,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 21:33:22,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 21:33:22,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 21:33:22,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 21:33:22,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 21:33:22,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 21:33:22,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 21:33:22,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 21:33:22,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 21:33:22,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 21:33:22,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 21:33:22,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 21:33:22,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 21:33:22,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 21:33:22,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 21:33:22,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 21:33:22,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 21:33:22,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 21:33:22,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 21:33:22,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 21:33:22,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 21:33:22,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 21:33:22,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 21:33:22,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 21:33:22,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:33:22,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:33:22,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:33:22,360 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 21:33:22,387 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:33:22,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:33:22,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:33:22,388 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:33:22,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:33:22,389 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:33:22,389 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:33:22,389 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:33:22,390 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:33:22,390 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:33:22,390 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:33:22,391 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:33:22,391 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:33:22,391 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:33:22,391 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:33:22,391 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:33:22,391 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:33:22,391 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:33:22,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:33:22,392 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:33:22,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:33:22,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:33:22,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:33:22,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:33:22,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:33:22,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:33:22,393 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:33:22,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:33:22,394 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:33:22,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:33:22,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:33:22,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:33:22,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:33:22,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:33:22,395 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:33:22,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:33:22,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:33:22,395 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:33:22,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:33:22,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:33:22,395 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:33:22,395 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:33:22,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:33:22,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:33:22,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:33:22,612 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:33:22,612 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:33:22,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-01-1.i [2023-04-02 21:33:23,797 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:33:24,084 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:33:24,085 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-01-1.i [2023-04-02 21:33:24,097 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e8e1165/c8dcb90616884be2a519b7ef47cdb74d/FLAGe900e7b10 [2023-04-02 21:33:24,108 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e8e1165/c8dcb90616884be2a519b7ef47cdb74d [2023-04-02 21:33:24,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:33:24,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:33:24,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:33:24,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:33:24,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:33:24,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:33:24" (1/1) ... [2023-04-02 21:33:24,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16419297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:33:24, skipping insertion in model container [2023-04-02 21:33:24,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:33:24" (1/1) ... [2023-04-02 21:33:24,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:33:24,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:33:24,410 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/forester-heap/sll-01-1.i[22034,22047] [2023-04-02 21:33:24,423 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/forester-heap/sll-01-1.i[22307,22320] [2023-04-02 21:33:24,426 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/forester-heap/sll-01-1.i[22516,22529] [2023-04-02 21:33:24,429 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/forester-heap/sll-01-1.i[22586,22599] [2023-04-02 21:33:24,431 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/forester-heap/sll-01-1.i[22853,22866] [2023-04-02 21:33:24,432 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/forester-heap/sll-01-1.i[22961,22974] [2023-04-02 21:33:24,433 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/forester-heap/sll-01-1.i[23192,23205] [2023-04-02 21:33:24,433 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/forester-heap/sll-01-1.i[23272,23285] [2023-04-02 21:33:24,434 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/forester-heap/sll-01-1.i[23351,23364] [2023-04-02 21:33:24,435 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/forester-heap/sll-01-1.i[23441,23454] [2023-04-02 21:33:24,436 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/forester-heap/sll-01-1.i[23619,23632] [2023-04-02 21:33:24,436 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/forester-heap/sll-01-1.i[23697,23710] [2023-04-02 21:33:24,437 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/forester-heap/sll-01-1.i[23774,23787] [2023-04-02 21:33:24,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:33:24,448 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:33:24,472 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/forester-heap/sll-01-1.i[22034,22047] [2023-04-02 21:33:24,474 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/forester-heap/sll-01-1.i[22307,22320] [2023-04-02 21:33:24,475 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/forester-heap/sll-01-1.i[22516,22529] [2023-04-02 21:33:24,476 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/forester-heap/sll-01-1.i[22586,22599] [2023-04-02 21:33:24,478 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/forester-heap/sll-01-1.i[22853,22866] [2023-04-02 21:33:24,478 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/forester-heap/sll-01-1.i[22961,22974] [2023-04-02 21:33:24,480 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/forester-heap/sll-01-1.i[23192,23205] [2023-04-02 21:33:24,480 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/forester-heap/sll-01-1.i[23272,23285] [2023-04-02 21:33:24,481 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/forester-heap/sll-01-1.i[23351,23364] [2023-04-02 21:33:24,482 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/forester-heap/sll-01-1.i[23441,23454] [2023-04-02 21:33:24,483 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/forester-heap/sll-01-1.i[23619,23632] [2023-04-02 21:33:24,483 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/forester-heap/sll-01-1.i[23697,23710] [2023-04-02 21:33:24,484 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/forester-heap/sll-01-1.i[23774,23787] [2023-04-02 21:33:24,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:33:24,506 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:33:24,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:33:24 WrapperNode [2023-04-02 21:33:24,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:33:24,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:33:24,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:33:24,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:33:24,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:33:24" (1/1) ... [2023-04-02 21:33:24,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:33:24" (1/1) ... [2023-04-02 21:33:24,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:33:24" (1/1) ... [2023-04-02 21:33:24,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:33:24" (1/1) ... [2023-04-02 21:33:24,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:33:24" (1/1) ... [2023-04-02 21:33:24,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:33:24" (1/1) ... [2023-04-02 21:33:24,560 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:33:24" (1/1) ... [2023-04-02 21:33:24,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:33:24" (1/1) ... [2023-04-02 21:33:24,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:33:24,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:33:24,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:33:24,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:33:24,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:33:24" (1/1) ... [2023-04-02 21:33:24,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:33:24,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:33:24,615 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 21:33:24,634 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 21:33:24,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:33:24,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:33:24,653 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:33:24,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:33:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-02 21:33:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-02 21:33:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-02 21:33:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-02 21:33:24,654 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-02 21:33:24,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-02 21:33:24,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-02 21:33:24,656 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-02 21:33:24,657 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-02 21:33:24,657 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-02 21:33:24,657 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-02 21:33:24,657 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-02 21:33:24,657 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-02 21:33:24,657 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-02 21:33:24,658 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-02 21:33:24,658 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-02 21:33:24,658 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-02 21:33:24,659 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-02 21:33:24,659 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-02 21:33:24,659 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-02 21:33:24,660 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-02 21:33:24,660 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-02 21:33:24,661 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-02 21:33:24,661 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-02 21:33:24,661 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-02 21:33:24,661 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-02 21:33:24,662 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-02 21:33:24,662 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-02 21:33:24,662 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-02 21:33:24,662 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-02 21:33:24,662 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-02 21:33:24,663 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-02 21:33:24,663 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-02 21:33:24,663 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-02 21:33:24,663 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-02 21:33:24,663 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-02 21:33:24,664 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-02 21:33:24,664 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-02 21:33:24,664 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-02 21:33:24,664 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-02 21:33:24,664 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-02 21:33:24,664 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-02 21:33:24,664 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-02 21:33:24,664 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-02 21:33:24,664 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-02 21:33:24,664 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-02 21:33:24,665 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-02 21:33:24,665 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-02 21:33:24,665 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-02 21:33:24,665 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-02 21:33:24,665 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 21:33:24,665 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-02 21:33:24,666 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-02 21:33:24,666 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 21:33:24,666 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-02 21:33:24,666 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-02 21:33:24,666 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-02 21:33:24,666 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-02 21:33:24,666 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-02 21:33:24,666 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:33:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-02 21:33:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-02 21:33:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-02 21:33:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 21:33:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-02 21:33:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-02 21:33:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-02 21:33:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-02 21:33:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-02 21:33:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-02 21:33:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-02 21:33:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-02 21:33:24,668 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-02 21:33:24,668 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-02 21:33:24,668 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-02 21:33:24,668 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-02 21:33:24,668 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-02 21:33:24,668 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-02 21:33:24,668 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-02 21:33:24,668 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-02 21:33:24,668 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-02 21:33:24,669 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-02 21:33:24,669 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-02 21:33:24,669 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-02 21:33:24,669 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-02 21:33:24,669 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-02 21:33:24,669 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-02 21:33:24,669 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-02 21:33:24,670 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-02 21:33:24,670 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-02 21:33:24,670 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-02 21:33:24,670 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-02 21:33:24,671 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-02 21:33:24,671 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-02 21:33:24,673 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-02 21:33:24,673 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-02 21:33:24,677 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-02 21:33:24,677 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-02 21:33:24,677 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-02 21:33:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-02 21:33:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-02 21:33:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-02 21:33:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-02 21:33:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 21:33:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:33:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 21:33:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 21:33:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:33:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:33:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:33:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 21:33:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 21:33:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 21:33:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:33:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:33:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:33:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:33:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:33:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:33:24,974 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:33:24,976 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:33:25,313 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:33:25,373 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:33:25,373 INFO L302 CfgBuilder]: Removed 30 assume(true) statements. [2023-04-02 21:33:25,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:33:25 BoogieIcfgContainer [2023-04-02 21:33:25,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:33:25,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:33:25,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:33:25,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:33:25,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:33:24" (1/3) ... [2023-04-02 21:33:25,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6ea820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:33:25, skipping insertion in model container [2023-04-02 21:33:25,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:33:24" (2/3) ... [2023-04-02 21:33:25,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6ea820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:33:25, skipping insertion in model container [2023-04-02 21:33:25,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:33:25" (3/3) ... [2023-04-02 21:33:25,383 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-01-1.i [2023-04-02 21:33:25,403 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:33:25,403 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-04-02 21:33:25,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:33:25,471 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;@2c6fea40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:33:25,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-04-02 21:33:25,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 62 states have (on average 1.935483870967742) internal successors, (120), 75 states have internal predecessors, (120), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 21:33:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-04-02 21:33:25,482 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:33:25,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:33:25,483 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:33:25,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:33:25,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1707333539, now seen corresponding path program 1 times [2023-04-02 21:33:25,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:33:25,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330139104] [2023-04-02 21:33:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:25,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:33:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:25,761 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 21:33:25,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:33:25,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330139104] [2023-04-02 21:33:25,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330139104] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:33:25,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:33:25,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 21:33:25,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613184886] [2023-04-02 21:33:25,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:33:25,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 21:33:25,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:33:25,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 21:33:25,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:33:25,817 INFO L87 Difference]: Start difference. First operand has 80 states, 62 states have (on average 1.935483870967742) internal successors, (120), 75 states have internal predecessors, (120), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:25,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:33:25,891 INFO L93 Difference]: Finished difference Result 171 states and 270 transitions. [2023-04-02 21:33:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 21:33:25,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-04-02 21:33:25,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:33:25,901 INFO L225 Difference]: With dead ends: 171 [2023-04-02 21:33:25,901 INFO L226 Difference]: Without dead ends: 93 [2023-04-02 21:33:25,904 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 21:33:25,907 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:33:25,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 90 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:33:25,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-02 21:33:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2023-04-02 21:33:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 71 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2023-04-02 21:33:25,946 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 7 [2023-04-02 21:33:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:33:25,946 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2023-04-02 21:33:25,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2023-04-02 21:33:25,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 21:33:25,947 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:33:25,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:33:25,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:33:25,947 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:33:25,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:33:25,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1294933009, now seen corresponding path program 1 times [2023-04-02 21:33:25,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:33:25,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745872588] [2023-04-02 21:33:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:25,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:33:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:26,247 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 21:33:26,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:33:26,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745872588] [2023-04-02 21:33:26,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745872588] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:33:26,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:33:26,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 21:33:26,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772834244] [2023-04-02 21:33:26,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:33:26,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 21:33:26,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:33:26,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 21:33:26,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:33:26,250 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:33:26,291 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2023-04-02 21:33:26,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 21:33:26,292 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-02 21:33:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:33:26,293 INFO L225 Difference]: With dead ends: 75 [2023-04-02 21:33:26,293 INFO L226 Difference]: Without dead ends: 73 [2023-04-02 21:33:26,293 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 21:33:26,294 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:33:26,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:33:26,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-02 21:33:26,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-04-02 21:33:26,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 69 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:26,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2023-04-02 21:33:26,302 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 11 [2023-04-02 21:33:26,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:33:26,303 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2023-04-02 21:33:26,303 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:26,303 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2023-04-02 21:33:26,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 21:33:26,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:33:26,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:33:26,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 21:33:26,304 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:33:26,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:33:26,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1711514031, now seen corresponding path program 1 times [2023-04-02 21:33:26,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:33:26,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941946154] [2023-04-02 21:33:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:26,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:33:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:26,407 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 21:33:26,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:33:26,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941946154] [2023-04-02 21:33:26,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941946154] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:33:26,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:33:26,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 21:33:26,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065135353] [2023-04-02 21:33:26,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:33:26,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 21:33:26,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:33:26,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 21:33:26,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:33:26,409 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:26,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:33:26,496 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2023-04-02 21:33:26,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 21:33:26,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-02 21:33:26,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:33:26,498 INFO L225 Difference]: With dead ends: 76 [2023-04-02 21:33:26,498 INFO L226 Difference]: Without dead ends: 72 [2023-04-02 21:33:26,499 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 21:33:26,501 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 12 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:33:26,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 107 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:33:26,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-02 21:33:26,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2023-04-02 21:33:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 65 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2023-04-02 21:33:26,526 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 16 [2023-04-02 21:33:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:33:26,527 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2023-04-02 21:33:26,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2023-04-02 21:33:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 21:33:26,528 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:33:26,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:33:26,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 21:33:26,528 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:33:26,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:33:26,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1517331616, now seen corresponding path program 1 times [2023-04-02 21:33:26,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:33:26,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889143269] [2023-04-02 21:33:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:26,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:33:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:26,681 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 21:33:26,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:33:26,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889143269] [2023-04-02 21:33:26,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889143269] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:33:26,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:33:26,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 21:33:26,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757470774] [2023-04-02 21:33:26,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:33:26,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 21:33:26,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:33:26,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 21:33:26,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 21:33:26,683 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:33:26,789 INFO L93 Difference]: Finished difference Result 127 states and 135 transitions. [2023-04-02 21:33:26,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 21:33:26,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-02 21:33:26,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:33:26,793 INFO L225 Difference]: With dead ends: 127 [2023-04-02 21:33:26,793 INFO L226 Difference]: Without dead ends: 107 [2023-04-02 21:33:26,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 21:33:26,797 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 115 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:33:26,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 108 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:33:26,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-02 21:33:26,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 68. [2023-04-02 21:33:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 64 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2023-04-02 21:33:26,815 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 17 [2023-04-02 21:33:26,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:33:26,815 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2023-04-02 21:33:26,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:26,815 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2023-04-02 21:33:26,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 21:33:26,816 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:33:26,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:33:26,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 21:33:26,816 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr9ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:33:26,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:33:26,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1177317895, now seen corresponding path program 1 times [2023-04-02 21:33:26,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:33:26,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646684804] [2023-04-02 21:33:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:26,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:33:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:26,918 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 21:33:26,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:33:26,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646684804] [2023-04-02 21:33:26,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646684804] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:33:26,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:33:26,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 21:33:26,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999033187] [2023-04-02 21:33:26,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:33:26,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 21:33:26,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:33:26,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 21:33:26,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:33:26,920 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:26,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:33:26,971 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2023-04-02 21:33:26,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 21:33:26,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-02 21:33:26,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:33:26,973 INFO L225 Difference]: With dead ends: 93 [2023-04-02 21:33:26,973 INFO L226 Difference]: Without dead ends: 91 [2023-04-02 21:33:26,974 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 21:33:26,977 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 23 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:33:26,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 123 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:33:26,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-04-02 21:33:26,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 70. [2023-04-02 21:33:26,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 66 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2023-04-02 21:33:26,990 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 21 [2023-04-02 21:33:26,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:33:26,990 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2023-04-02 21:33:26,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2023-04-02 21:33:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 21:33:26,991 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:33:26,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:33:26,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 21:33:26,992 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr6ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:33:26,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:33:26,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1177315875, now seen corresponding path program 1 times [2023-04-02 21:33:26,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:33:26,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679994686] [2023-04-02 21:33:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:26,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:33:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:27,090 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 21:33:27,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:33:27,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679994686] [2023-04-02 21:33:27,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679994686] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:33:27,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:33:27,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 21:33:27,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259980925] [2023-04-02 21:33:27,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:33:27,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 21:33:27,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:33:27,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 21:33:27,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:33:27,092 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:33:27,134 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2023-04-02 21:33:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 21:33:27,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-02 21:33:27,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:33:27,135 INFO L225 Difference]: With dead ends: 70 [2023-04-02 21:33:27,135 INFO L226 Difference]: Without dead ends: 68 [2023-04-02 21:33:27,135 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 21:33:27,136 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:33:27,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 104 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:33:27,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-02 21:33:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-04-02 21:33:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.206896551724138) internal successors, (70), 64 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2023-04-02 21:33:27,153 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 21 [2023-04-02 21:33:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:33:27,153 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2023-04-02 21:33:27,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2023-04-02 21:33:27,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 21:33:27,154 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:33:27,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:33:27,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 21:33:27,155 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:33:27,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:33:27,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1211259227, now seen corresponding path program 1 times [2023-04-02 21:33:27,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:33:27,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644432327] [2023-04-02 21:33:27,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:27,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:33:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:27,497 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 21:33:27,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:33:27,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644432327] [2023-04-02 21:33:27,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644432327] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:33:27,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:33:27,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 21:33:27,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687942289] [2023-04-02 21:33:27,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:33:27,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 21:33:27,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:33:27,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 21:33:27,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:33:27,498 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:33:27,537 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2023-04-02 21:33:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 21:33:27,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-04-02 21:33:27,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:33:27,538 INFO L225 Difference]: With dead ends: 68 [2023-04-02 21:33:27,538 INFO L226 Difference]: Without dead ends: 66 [2023-04-02 21:33:27,538 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 21:33:27,539 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:33:27,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:33:27,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-02 21:33:27,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-04-02 21:33:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 62 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2023-04-02 21:33:27,544 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 22 [2023-04-02 21:33:27,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:33:27,545 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2023-04-02 21:33:27,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:27,545 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2023-04-02 21:33:27,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 21:33:27,545 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:33:27,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:33:27,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 21:33:27,546 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:33:27,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:33:27,546 INFO L85 PathProgramCache]: Analyzing trace with hash -710191671, now seen corresponding path program 1 times [2023-04-02 21:33:27,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:33:27,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461124758] [2023-04-02 21:33:27,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:27,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:33:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:30,761 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 21:33:30,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:33:30,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461124758] [2023-04-02 21:33:30,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461124758] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:33:30,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:33:30,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 21:33:30,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851702524] [2023-04-02 21:33:30,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:33:30,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 21:33:30,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:33:30,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 21:33:30,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 21:33:30,764 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:31,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:33:31,296 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2023-04-02 21:33:31,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 21:33:31,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-04-02 21:33:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:33:31,304 INFO L225 Difference]: With dead ends: 152 [2023-04-02 21:33:31,305 INFO L226 Difference]: Without dead ends: 150 [2023-04-02 21:33:31,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-04-02 21:33:31,306 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 280 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 21:33:31,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 256 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 21:33:31,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-04-02 21:33:31,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 83. [2023-04-02 21:33:31,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 79 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:31,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2023-04-02 21:33:31,325 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 24 [2023-04-02 21:33:31,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:33:31,327 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2023-04-02 21:33:31,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:31,327 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2023-04-02 21:33:31,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 21:33:31,332 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:33:31,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:33:31,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 21:33:31,332 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr10ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:33:31,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:33:31,333 INFO L85 PathProgramCache]: Analyzing trace with hash -359386214, now seen corresponding path program 1 times [2023-04-02 21:33:31,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:33:31,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146484436] [2023-04-02 21:33:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:31,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:33:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 21:33:31,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:33:31,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146484436] [2023-04-02 21:33:31,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146484436] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:33:31,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:33:31,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 21:33:31,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516763037] [2023-04-02 21:33:31,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:33:31,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 21:33:31,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:33:31,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 21:33:31,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:33:31,398 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:31,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:33:31,461 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2023-04-02 21:33:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 21:33:31,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-02 21:33:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:33:31,462 INFO L225 Difference]: With dead ends: 83 [2023-04-02 21:33:31,463 INFO L226 Difference]: Without dead ends: 81 [2023-04-02 21:33:31,463 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 21:33:31,464 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 43 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:33:31,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:33:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-04-02 21:33:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-04-02 21:33:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 77 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2023-04-02 21:33:31,481 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 27 [2023-04-02 21:33:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:33:31,482 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2023-04-02 21:33:31,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2023-04-02 21:33:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 21:33:31,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:33:31,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:33:31,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 21:33:31,485 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr8ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:33:31,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:33:31,485 INFO L85 PathProgramCache]: Analyzing trace with hash -307051473, now seen corresponding path program 1 times [2023-04-02 21:33:31,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:33:31,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492489493] [2023-04-02 21:33:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:31,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:33:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:34,070 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 21:33:34,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:33:34,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492489493] [2023-04-02 21:33:34,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492489493] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:33:34,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:33:34,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 21:33:34,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223052231] [2023-04-02 21:33:34,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:33:34,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 21:33:34,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:33:34,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 21:33:34,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 21:33:34,072 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:33:34,580 INFO L93 Difference]: Finished difference Result 139 states and 151 transitions. [2023-04-02 21:33:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 21:33:34,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-02 21:33:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:33:34,581 INFO L225 Difference]: With dead ends: 139 [2023-04-02 21:33:34,581 INFO L226 Difference]: Without dead ends: 137 [2023-04-02 21:33:34,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2023-04-02 21:33:34,582 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 212 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 21:33:34,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 272 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 21:33:34,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-04-02 21:33:34,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 88. [2023-04-02 21:33:34,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.175) internal successors, (94), 84 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:34,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2023-04-02 21:33:34,607 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 27 [2023-04-02 21:33:34,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:33:34,607 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2023-04-02 21:33:34,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:33:34,608 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2023-04-02 21:33:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 21:33:34,610 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:33:34,610 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:33:34,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 21:33:34,610 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr7ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:33:34,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:33:34,611 INFO L85 PathProgramCache]: Analyzing trace with hash -281182999, now seen corresponding path program 1 times [2023-04-02 21:33:34,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:33:34,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965884453] [2023-04-02 21:33:34,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:34,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:33:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:35,690 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 21:33:35,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:33:35,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965884453] [2023-04-02 21:33:35,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965884453] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:33:35,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682591954] [2023-04-02 21:33:35,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:33:35,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:33:35,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:33:35,701 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 21:33:35,720 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 21:33:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:33:35,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 21:33:35,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:33:35,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:33:36,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:33:36,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 21:33:36,238 INFO L321 Elim1Store]: treesize reduction 63, result has 40.0 percent of original size [2023-04-02 21:33:36,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 176 treesize of output 254 [2023-04-02 21:33:36,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 284 [2023-04-02 21:33:36,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 165 [2023-04-02 21:33:36,379 INFO L321 Elim1Store]: treesize reduction 63, result has 25.0 percent of original size [2023-04-02 21:33:36,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 351 treesize of output 379 [2023-04-02 21:33:36,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 158 [2023-04-02 21:33:36,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 137 [2023-04-02 21:33:36,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2023-04-02 21:33:36,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 106 [2023-04-02 21:33:36,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-04-02 21:33:36,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 62 [2023-04-02 21:33:36,761 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:33:36,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2023-04-02 21:33:36,972 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-04-02 21:33:36,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 1 [2023-04-02 21:33:36,979 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:33:36,982 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-04-02 21:33:36,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 1 [2023-04-02 21:33:37,048 INFO L321 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2023-04-02 21:33:37,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 36 [2023-04-02 21:33:37,770 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 21:33:37,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:33:37,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:33:37,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 200 treesize of output 216 [2023-04-02 21:33:38,294 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 21:33:38,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682591954] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:33:38,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554421512] [2023-04-02 21:33:38,316 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-02 21:33:38,317 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:33:38,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:33:38,324 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:33:38,325 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:33:38,384 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:33:39,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:33:39,646 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:33:45,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [554421512] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:33:45,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:33:45,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [6, 8, 8] total 31 [2023-04-02 21:33:45,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545573364] [2023-04-02 21:33:45,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:33:45,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 21:33:45,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:33:45,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 21:33:45,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=713, Unknown=9, NotChecked=0, Total=930 [2023-04-02 21:33:45,544 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 18 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:34:42,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:34:42,949 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2023-04-02 21:34:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 21:34:42,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-04-02 21:34:42,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:34:42,952 INFO L225 Difference]: With dead ends: 209 [2023-04-02 21:34:42,956 INFO L226 Difference]: Without dead ends: 207 [2023-04-02 21:34:42,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=624, Invalid=2010, Unknown=18, NotChecked=0, Total=2652 [2023-04-02 21:34:42,959 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 515 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 9 mSolverCounterUnsat, 54 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 54 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.7s IncrementalHoareTripleChecker+Time [2023-04-02 21:34:42,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 5 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 685 Invalid, 54 Unknown, 0 Unchecked, 27.7s Time] [2023-04-02 21:34:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-04-02 21:34:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 92. [2023-04-02 21:34:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 84 states have (on average 1.1666666666666667) internal successors, (98), 88 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:34:42,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2023-04-02 21:34:42,999 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 29 [2023-04-02 21:34:43,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:34:43,000 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2023-04-02 21:34:43,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:34:43,000 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2023-04-02 21:34:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 21:34:43,001 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:34:43,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:34:43,007 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 21:34:43,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 21:34:43,205 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr11ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:34:43,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:34:43,206 INFO L85 PathProgramCache]: Analyzing trace with hash 882958342, now seen corresponding path program 1 times [2023-04-02 21:34:43,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:34:43,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314491780] [2023-04-02 21:34:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:34:43,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:34:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:34:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:34:43,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:34:43,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314491780] [2023-04-02 21:34:43,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314491780] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:34:43,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953749131] [2023-04-02 21:34:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:34:43,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:34:43,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:34:43,429 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 21:34:43,432 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 21:34:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:34:43,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 21:34:43,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:34:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:34:43,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:34:43,891 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 21:34:43,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953749131] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 21:34:43,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 21:34:43,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 13 [2023-04-02 21:34:43,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451700245] [2023-04-02 21:34:43,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:34:43,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 21:34:43,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:34:43,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 21:34:43,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-04-02 21:34:43,892 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:34:44,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:34:44,134 INFO L93 Difference]: Finished difference Result 162 states and 178 transitions. [2023-04-02 21:34:44,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 21:34:44,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-04-02 21:34:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:34:44,135 INFO L225 Difference]: With dead ends: 162 [2023-04-02 21:34:44,135 INFO L226 Difference]: Without dead ends: 146 [2023-04-02 21:34:44,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-04-02 21:34:44,136 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 68 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:34:44,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 205 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:34:44,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-04-02 21:34:44,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 115. [2023-04-02 21:34:44,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 111 states have internal predecessors, (128), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:34:44,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 131 transitions. [2023-04-02 21:34:44,189 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 131 transitions. Word has length 30 [2023-04-02 21:34:44,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:34:44,189 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 131 transitions. [2023-04-02 21:34:44,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:34:44,189 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 131 transitions. [2023-04-02 21:34:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 21:34:44,190 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:34:44,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:34:44,204 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 21:34:44,396 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,SelfDestructingSolverStorable11 [2023-04-02 21:34:44,397 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr9ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:34:44,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:34:44,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1729320029, now seen corresponding path program 1 times [2023-04-02 21:34:44,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:34:44,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100882301] [2023-04-02 21:34:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:34:44,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:34:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:34:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:34:44,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:34:44,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100882301] [2023-04-02 21:34:44,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100882301] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:34:44,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477085859] [2023-04-02 21:34:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:34:44,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:34:44,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:34:44,473 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 21:34:44,477 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 21:34:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:34:44,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 21:34:44,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:34:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:34:44,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:34:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:34:44,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477085859] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:34:44,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1938010876] [2023-04-02 21:34:44,738 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-02 21:34:44,738 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:34:44,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:34:44,738 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:34:44,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:34:44,756 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:34:45,959 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:34:45,963 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:34:50,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1938010876] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:34:50,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:34:50,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [4, 4, 4] total 20 [2023-04-02 21:34:50,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591581413] [2023-04-02 21:34:50,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:34:50,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 21:34:50,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:34:50,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 21:34:50,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-04-02 21:34:50,565 INFO L87 Difference]: Start difference. First operand 115 states and 131 transitions. Second operand has 17 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:35:01,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:35:01,904 INFO L93 Difference]: Finished difference Result 251 states and 284 transitions. [2023-04-02 21:35:01,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 21:35:01,904 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2023-04-02 21:35:01,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:35:01,906 INFO L225 Difference]: With dead ends: 251 [2023-04-02 21:35:01,906 INFO L226 Difference]: Without dead ends: 199 [2023-04-02 21:35:01,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 21:35:01,907 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 309 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:35:01,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 6 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-04-02 21:35:01,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-04-02 21:35:01,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 108. [2023-04-02 21:35:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 100 states have (on average 1.19) internal successors, (119), 104 states have internal predecessors, (119), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:35:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2023-04-02 21:35:01,969 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 31 [2023-04-02 21:35:01,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:35:01,970 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2023-04-02 21:35:01,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:35:01,970 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2023-04-02 21:35:01,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 21:35:01,970 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:35:01,970 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:35:01,979 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 21:35:02,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:35:02,177 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr8ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:35:02,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:35:02,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1532376817, now seen corresponding path program 1 times [2023-04-02 21:35:02,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:35:02,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156659605] [2023-04-02 21:35:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:35:02,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:35:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:35:03,285 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 21:35:03,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:35:03,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156659605] [2023-04-02 21:35:03,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156659605] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:35:03,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906169639] [2023-04-02 21:35:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:35:03,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:35:03,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:35:03,287 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 21:35:03,289 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 21:35:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:35:03,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-02 21:35:03,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:35:03,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 21:35:03,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:35:03,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 21:35:03,612 INFO L321 Elim1Store]: treesize reduction 63, result has 40.0 percent of original size [2023-04-02 21:35:03,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 176 treesize of output 249 [2023-04-02 21:35:03,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 274 [2023-04-02 21:35:03,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 180 [2023-04-02 21:35:03,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 159 [2023-04-02 21:35:03,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 143 [2023-04-02 21:35:03,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2023-04-02 21:35:03,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 90 [2023-04-02 21:35:03,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2023-04-02 21:35:03,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:35:03,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2023-04-02 21:35:03,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:35:03,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-02 21:35:03,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2023-04-02 21:35:03,954 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-04-02 21:35:03,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 11 [2023-04-02 21:35:04,535 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 21:35:04,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:35:04,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:35:04,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 200 treesize of output 216 [2023-04-02 21:35:04,958 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 21:35:04,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906169639] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:35:04,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [187843406] [2023-04-02 21:35:04,960 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-02 21:35:04,960 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:35:04,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:35:04,961 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:35:04,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:35:04,974 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:35:05,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:35:05,989 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:35:11,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [187843406] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:35:11,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:35:11,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [6, 8, 8] total 30 [2023-04-02 21:35:11,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303982067] [2023-04-02 21:35:11,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:35:11,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 21:35:11,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:35:11,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 21:35:11,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=640, Unknown=32, NotChecked=0, Total=870 [2023-04-02 21:35:11,832 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand has 17 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:35:25,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:35:25,297 INFO L93 Difference]: Finished difference Result 256 states and 286 transitions. [2023-04-02 21:35:25,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 21:35:25,298 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 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 21:35:25,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:35:25,299 INFO L225 Difference]: With dead ends: 256 [2023-04-02 21:35:25,299 INFO L226 Difference]: Without dead ends: 254 [2023-04-02 21:35:25,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=626, Invalid=1982, Unknown=44, NotChecked=0, Total=2652 [2023-04-02 21:35:25,300 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 455 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:35:25,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 4 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-04-02 21:35:25,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-04-02 21:35:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 114. [2023-04-02 21:35:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 106 states have (on average 1.179245283018868) internal successors, (125), 110 states have internal predecessors, (125), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:35:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2023-04-02 21:35:25,366 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 32 [2023-04-02 21:35:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:35:25,366 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2023-04-02 21:35:25,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:35:25,366 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2023-04-02 21:35:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 21:35:25,367 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:35:25,367 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:35:25,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 21:35:25,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:35:25,570 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr11ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:35:25,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:35:25,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1431924762, now seen corresponding path program 1 times [2023-04-02 21:35:25,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:35:25,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888940447] [2023-04-02 21:35:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:35:25,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:35:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:35:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:35:25,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:35:25,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888940447] [2023-04-02 21:35:25,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888940447] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:35:25,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067286155] [2023-04-02 21:35:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:35:25,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:35:25,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:35:25,757 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 21:35:25,785 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 21:35:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:35:25,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 21:35:25,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:35:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:35:26,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:35:26,135 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-04-02 21:35:26,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-04-02 21:35:26,143 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-04-02 21:35:26,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2023-04-02 21:35:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:35:26,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067286155] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:35:26,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [34096536] [2023-04-02 21:35:26,184 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-02 21:35:26,185 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:35:26,185 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:35:26,185 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:35:26,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:35:26,210 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:35:26,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:35:26,920 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:35:30,415 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5480#(and (<= 1 |#StackHeapBarrier|) (or (not (= main_~end~0.offset 0)) (not (= main_~end~0.base 0))) (= |#NULL.offset| 0) (or (not (= 0 (select (select |#memory_$Pointer$.offset| main_~end~0.base) (+ main_~end~0.offset 4)))) (not (= (select (select |#memory_$Pointer$.base| main_~end~0.base) (+ main_~end~0.offset 4)) 0))) (= |#NULL.base| 0))' at error location [2023-04-02 21:35:30,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:35:30,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:35:30,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2023-04-02 21:35:30,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219000866] [2023-04-02 21:35:30,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:35:30,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 21:35:30,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:35:30,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 21:35:30,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2023-04-02 21:35:30,417 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:35:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:35:30,813 INFO L93 Difference]: Finished difference Result 308 states and 346 transitions. [2023-04-02 21:35:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 21:35:30,813 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2023-04-02 21:35:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:35:30,814 INFO L225 Difference]: With dead ends: 308 [2023-04-02 21:35:30,814 INFO L226 Difference]: Without dead ends: 228 [2023-04-02 21:35:30,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 21:35:30,816 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 347 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 21:35:30,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 329 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 21:35:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-04-02 21:35:30,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 152. [2023-04-02 21:35:30,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 144 states have (on average 1.1666666666666667) internal successors, (168), 148 states have internal predecessors, (168), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:35:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 171 transitions. [2023-04-02 21:35:30,919 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 171 transitions. Word has length 33 [2023-04-02 21:35:30,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:35:30,919 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 171 transitions. [2023-04-02 21:35:30,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:35:30,919 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 171 transitions. [2023-04-02 21:35:30,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 21:35:30,920 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:35:30,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:35:30,929 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 21:35:31,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 21:35:31,127 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr11ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:35:31,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:35:31,127 INFO L85 PathProgramCache]: Analyzing trace with hash -868384356, now seen corresponding path program 1 times [2023-04-02 21:35:31,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:35:31,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854492372] [2023-04-02 21:35:31,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:35:31,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:35:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:35:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:35:32,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:35:32,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854492372] [2023-04-02 21:35:32,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854492372] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:35:32,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:35:32,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 21:35:32,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092384251] [2023-04-02 21:35:32,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:35:32,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 21:35:32,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:35:32,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 21:35:32,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 21:35:32,842 INFO L87 Difference]: Start difference. First operand 152 states and 171 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:35:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:35:33,225 INFO L93 Difference]: Finished difference Result 181 states and 200 transitions. [2023-04-02 21:35:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 21:35:33,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-04-02 21:35:33,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:35:33,227 INFO L225 Difference]: With dead ends: 181 [2023-04-02 21:35:33,227 INFO L226 Difference]: Without dead ends: 179 [2023-04-02 21:35:33,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-04-02 21:35:33,228 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 100 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:35:33,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 247 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:35:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-04-02 21:35:33,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 158. [2023-04-02 21:35:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 150 states have (on average 1.16) internal successors, (174), 154 states have internal predecessors, (174), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:35:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 177 transitions. [2023-04-02 21:35:33,317 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 177 transitions. Word has length 40 [2023-04-02 21:35:33,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:35:33,317 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 177 transitions. [2023-04-02 21:35:33,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:35:33,318 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 177 transitions. [2023-04-02 21:35:33,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 21:35:33,318 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:35:33,318 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:35:33,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 21:35:33,318 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr9ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:35:33,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:35:33,319 INFO L85 PathProgramCache]: Analyzing trace with hash -310838866, now seen corresponding path program 1 times [2023-04-02 21:35:33,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:35:33,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860891801] [2023-04-02 21:35:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:35:33,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:35:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:35:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:35:33,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:35:33,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860891801] [2023-04-02 21:35:33,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860891801] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:35:33,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515199830] [2023-04-02 21:35:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:35:33,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:35:33,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:35:33,421 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:35:33,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 21:35:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:35:33,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 21:35:33,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:35:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:35:33,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:35:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:35:33,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515199830] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:35:33,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [453614343] [2023-04-02 21:35:33,763 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-04-02 21:35:33,763 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:35:33,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:35:33,764 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:35:33,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:35:33,779 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:35:34,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:35:34,533 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:35:36,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [453614343] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:35:36,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:35:36,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [4, 4, 4] total 28 [2023-04-02 21:35:36,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853853126] [2023-04-02 21:35:36,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:35:36,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 21:35:36,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:35:36,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 21:35:36,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=642, Unknown=1, NotChecked=0, Total=756 [2023-04-02 21:35:36,460 INFO L87 Difference]: Start difference. First operand 158 states and 177 transitions. Second operand has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:35:46,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 21:35:58,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 21:36:04,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:36:04,806 INFO L93 Difference]: Finished difference Result 337 states and 379 transitions. [2023-04-02 21:36:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-02 21:36:04,806 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-02 21:36:04,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:36:04,807 INFO L225 Difference]: With dead ends: 337 [2023-04-02 21:36:04,808 INFO L226 Difference]: Without dead ends: 269 [2023-04-02 21:36:04,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=902, Invalid=4597, Unknown=51, NotChecked=0, Total=5550 [2023-04-02 21:36:04,810 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 543 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 26 mSolverCounterUnsat, 44 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 44 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2023-04-02 21:36:04,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 14 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 937 Invalid, 44 Unknown, 0 Unchecked, 12.4s Time] [2023-04-02 21:36:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-04-02 21:36:04,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 151. [2023-04-02 21:36:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 147 states have internal predecessors, (163), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2023-04-02 21:36:04,907 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 41 [2023-04-02 21:36:04,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:36:04,907 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2023-04-02 21:36:04,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2023-04-02 21:36:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 21:36:04,908 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:36:04,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:36:04,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 21:36:05,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 21:36:05,109 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr12ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:36:05,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:36:05,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1446117226, now seen corresponding path program 1 times [2023-04-02 21:36:05,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:36:05,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060047933] [2023-04-02 21:36:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:36:05,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:36:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:36:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:36:07,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:36:07,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060047933] [2023-04-02 21:36:07,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060047933] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:36:07,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:36:07,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 21:36:07,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254661601] [2023-04-02 21:36:07,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:36:07,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 21:36:07,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:36:07,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 21:36:07,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 21:36:07,176 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:07,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:36:07,520 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2023-04-02 21:36:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 21:36:07,520 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-04-02 21:36:07,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:36:07,521 INFO L225 Difference]: With dead ends: 172 [2023-04-02 21:36:07,521 INFO L226 Difference]: Without dead ends: 142 [2023-04-02 21:36:07,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-04-02 21:36:07,522 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 116 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:36:07,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 241 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:36:07,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-04-02 21:36:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 126. [2023-04-02 21:36:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 118 states have (on average 1.1610169491525424) internal successors, (137), 122 states have internal predecessors, (137), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:07,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 140 transitions. [2023-04-02 21:36:07,614 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 140 transitions. Word has length 43 [2023-04-02 21:36:07,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:36:07,614 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 140 transitions. [2023-04-02 21:36:07,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:07,615 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 140 transitions. [2023-04-02 21:36:07,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 21:36:07,615 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:36:07,615 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:36:07,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-02 21:36:07,616 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr9ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:36:07,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:36:07,616 INFO L85 PathProgramCache]: Analyzing trace with hash 282067288, now seen corresponding path program 1 times [2023-04-02 21:36:07,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:36:07,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431094421] [2023-04-02 21:36:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:36:07,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:36:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:36:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 21:36:07,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:36:07,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431094421] [2023-04-02 21:36:07,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431094421] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:36:07,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052131417] [2023-04-02 21:36:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:36:07,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:36:07,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:36:07,705 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:36:07,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 21:36:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:36:08,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 21:36:08,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:36:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 21:36:08,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:36:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 21:36:08,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052131417] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:36:08,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [799333489] [2023-04-02 21:36:08,072 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-04-02 21:36:08,073 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:36:08,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:36:08,073 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:36:08,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:36:08,084 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:36:08,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:36:08,891 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:36:10,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8426#(and (< 1 main_~len~0) (= 0 main_~inner~0.offset) (= main_~inner~0.base 0))' at error location [2023-04-02 21:36:10,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:36:10,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:36:10,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-04-02 21:36:10,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014999657] [2023-04-02 21:36:10,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:36:10,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 21:36:10,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:36:10,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 21:36:10,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=679, Unknown=1, NotChecked=0, Total=756 [2023-04-02 21:36:10,709 INFO L87 Difference]: Start difference. First operand 126 states and 140 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:36:10,847 INFO L93 Difference]: Finished difference Result 184 states and 207 transitions. [2023-04-02 21:36:10,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 21:36:10,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-04-02 21:36:10,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:36:10,848 INFO L225 Difference]: With dead ends: 184 [2023-04-02 21:36:10,848 INFO L226 Difference]: Without dead ends: 182 [2023-04-02 21:36:10,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=76, Invalid=679, Unknown=1, NotChecked=0, Total=756 [2023-04-02 21:36:10,849 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 105 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:36:10,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 159 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:36:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-04-02 21:36:10,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 132. [2023-04-02 21:36:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 124 states have (on average 1.1693548387096775) internal successors, (145), 128 states have internal predecessors, (145), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 148 transitions. [2023-04-02 21:36:10,928 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 148 transitions. Word has length 46 [2023-04-02 21:36:10,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:36:10,928 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 148 transitions. [2023-04-02 21:36:10,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:10,928 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 148 transitions. [2023-04-02 21:36:10,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 21:36:10,928 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:36:10,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:36:10,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 21:36:11,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:36:11,130 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr11ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:36:11,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:36:11,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1223996325, now seen corresponding path program 1 times [2023-04-02 21:36:11,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:36:11,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261453540] [2023-04-02 21:36:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:36:11,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:36:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:36:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:36:14,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:36:14,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261453540] [2023-04-02 21:36:14,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261453540] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:36:14,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906087972] [2023-04-02 21:36:14,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:36:14,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:36:14,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:36:14,082 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:36:14,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 21:36:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:36:14,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-02 21:36:14,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:36:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:36:14,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:36:14,767 INFO L321 Elim1Store]: treesize reduction 8, result has 91.9 percent of original size [2023-04-02 21:36:14,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 134 [2023-04-02 21:36:14,826 INFO L321 Elim1Store]: treesize reduction 22, result has 67.2 percent of original size [2023-04-02 21:36:14,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 127 [2023-04-02 21:36:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:36:15,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906087972] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:36:15,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610229333] [2023-04-02 21:36:15,076 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-04-02 21:36:15,076 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:36:15,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:36:15,077 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:36:15,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:36:15,091 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:36:15,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:36:15,835 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:36:18,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9201#(and (or (not (= main_~end~0.offset 0)) (not (= main_~end~0.base 0))) (or (not (= 0 (select (select |#memory_$Pointer$.offset| main_~end~0.base) (+ main_~end~0.offset 4)))) (not (= (select (select |#memory_$Pointer$.base| main_~end~0.base) (+ main_~end~0.offset 4)) 0))))' at error location [2023-04-02 21:36:18,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:36:18,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:36:18,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 8] total 25 [2023-04-02 21:36:18,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913944192] [2023-04-02 21:36:18,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:36:18,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 21:36:18,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:36:18,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 21:36:18,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1899, Unknown=1, NotChecked=0, Total=2070 [2023-04-02 21:36:18,540 INFO L87 Difference]: Start difference. First operand 132 states and 148 transitions. Second operand has 25 states, 25 states have (on average 4.48) internal successors, (112), 25 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:36:19,884 INFO L93 Difference]: Finished difference Result 309 states and 350 transitions. [2023-04-02 21:36:19,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 21:36:19,884 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.48) internal successors, (112), 25 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-04-02 21:36:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:36:19,885 INFO L225 Difference]: With dead ends: 309 [2023-04-02 21:36:19,885 INFO L226 Difference]: Without dead ends: 293 [2023-04-02 21:36:19,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=370, Invalid=3661, Unknown=1, NotChecked=0, Total=4032 [2023-04-02 21:36:19,887 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 380 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 21:36:19,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1068 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 21:36:19,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-04-02 21:36:20,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 200. [2023-04-02 21:36:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 192 states have (on average 1.2083333333333333) internal successors, (232), 196 states have internal predecessors, (232), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 235 transitions. [2023-04-02 21:36:20,040 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 235 transitions. Word has length 48 [2023-04-02 21:36:20,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:36:20,040 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 235 transitions. [2023-04-02 21:36:20,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.48) internal successors, (112), 25 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 235 transitions. [2023-04-02 21:36:20,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-02 21:36:20,041 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:36:20,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:36:20,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 21:36:20,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:36:20,253 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr7ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:36:20,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:36:20,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2120142326, now seen corresponding path program 1 times [2023-04-02 21:36:20,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:36:20,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703083549] [2023-04-02 21:36:20,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:36:20,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:36:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:36:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 21:36:20,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:36:20,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703083549] [2023-04-02 21:36:20,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703083549] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:36:20,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:36:20,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 21:36:20,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625005407] [2023-04-02 21:36:20,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:36:20,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 21:36:20,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:36:20,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 21:36:20,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 21:36:20,393 INFO L87 Difference]: Start difference. First operand 200 states and 235 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:36:20,613 INFO L93 Difference]: Finished difference Result 292 states and 343 transitions. [2023-04-02 21:36:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 21:36:20,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-04-02 21:36:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:36:20,615 INFO L225 Difference]: With dead ends: 292 [2023-04-02 21:36:20,615 INFO L226 Difference]: Without dead ends: 150 [2023-04-02 21:36:20,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 21:36:20,616 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 21 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:36:20,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 147 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:36:20,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-04-02 21:36:20,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-04-02 21:36:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 146 states have internal predecessors, (165), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:20,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2023-04-02 21:36:20,716 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 49 [2023-04-02 21:36:20,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:36:20,716 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2023-04-02 21:36:20,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:20,716 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2023-04-02 21:36:20,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 21:36:20,716 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:36:20,717 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:36:20,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-02 21:36:20,717 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr11ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:36:20,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:36:20,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1261383695, now seen corresponding path program 1 times [2023-04-02 21:36:20,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:36:20,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373061461] [2023-04-02 21:36:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:36:20,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:36:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:36:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 21:36:23,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:36:23,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373061461] [2023-04-02 21:36:23,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373061461] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:36:23,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222555293] [2023-04-02 21:36:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:36:23,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:36:23,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:36:23,051 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:36:23,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 21:36:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:36:23,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-02 21:36:23,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:36:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:36:23,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:36:23,783 INFO L321 Elim1Store]: treesize reduction 8, result has 92.2 percent of original size [2023-04-02 21:36:23,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 142 [2023-04-02 21:36:23,845 INFO L321 Elim1Store]: treesize reduction 22, result has 70.7 percent of original size [2023-04-02 21:36:23,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 127 [2023-04-02 21:36:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:36:24,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222555293] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:36:24,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527445976] [2023-04-02 21:36:24,116 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2023-04-02 21:36:24,116 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:36:24,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:36:24,117 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:36:24,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:36:24,129 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:36:24,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:36:24,859 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:36:27,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10926#(and (= main_~end~0.offset (select (select |#memory_$Pointer$.offset| main_~list~0.base) (+ main_~list~0.offset 4))) (= (select (select |#memory_$Pointer$.base| main_~list~0.base) (+ main_~list~0.offset 4)) main_~end~0.base) (or (not (= main_~list~0.offset 0)) (not (= main_~list~0.base 0))) (or (not (= main_~end~0.offset 0)) (not (= main_~end~0.base 0))) (or (not (= 0 (select (select |#memory_$Pointer$.offset| main_~end~0.base) (+ main_~end~0.offset 4)))) (not (= (select (select |#memory_$Pointer$.base| main_~end~0.base) (+ main_~end~0.offset 4)) 0))))' at error location [2023-04-02 21:36:27,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:36:27,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:36:27,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2023-04-02 21:36:27,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184641674] [2023-04-02 21:36:27,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:36:27,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 21:36:27,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:36:27,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 21:36:27,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2012, Unknown=1, NotChecked=0, Total=2162 [2023-04-02 21:36:27,992 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand has 21 states, 21 states have (on average 6.380952380952381) internal successors, (134), 21 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:29,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:36:29,429 INFO L93 Difference]: Finished difference Result 351 states and 388 transitions. [2023-04-02 21:36:29,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-02 21:36:29,431 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.380952380952381) internal successors, (134), 21 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-04-02 21:36:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:36:29,432 INFO L225 Difference]: With dead ends: 351 [2023-04-02 21:36:29,432 INFO L226 Difference]: Without dead ends: 338 [2023-04-02 21:36:29,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=573, Invalid=4976, Unknown=1, NotChecked=0, Total=5550 [2023-04-02 21:36:29,434 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 529 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 21:36:29,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 582 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 21:36:29,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-04-02 21:36:29,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 185. [2023-04-02 21:36:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.1166666666666667) internal successors, (201), 181 states have internal predecessors, (201), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 204 transitions. [2023-04-02 21:36:29,568 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 204 transitions. Word has length 50 [2023-04-02 21:36:29,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:36:29,568 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 204 transitions. [2023-04-02 21:36:29,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.380952380952381) internal successors, (134), 21 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 204 transitions. [2023-04-02 21:36:29,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 21:36:29,569 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:36:29,569 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:36:29,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 21:36:29,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:36:29,777 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr11ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:36:29,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:36:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1228621681, now seen corresponding path program 2 times [2023-04-02 21:36:29,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:36:29,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344428098] [2023-04-02 21:36:29,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:36:29,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:36:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:36:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:36:30,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:36:30,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344428098] [2023-04-02 21:36:30,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344428098] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:36:30,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012998680] [2023-04-02 21:36:30,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:36:30,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:36:30,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:36:30,067 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:36:30,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 21:36:30,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 21:36:30,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:36:30,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-02 21:36:30,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:36:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:36:30,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:36:31,121 INFO L321 Elim1Store]: treesize reduction 8, result has 91.2 percent of original size [2023-04-02 21:36:31,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 122 [2023-04-02 21:36:31,161 INFO L321 Elim1Store]: treesize reduction 22, result has 67.2 percent of original size [2023-04-02 21:36:31,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 115 [2023-04-02 21:36:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:36:31,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012998680] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:36:31,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1412862412] [2023-04-02 21:36:31,462 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-04-02 21:36:31,462 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:36:31,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:36:31,463 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:36:31,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:36:31,478 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:36:32,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:36:32,139 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:36:34,896 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12093#(and (or (not (= main_~end~0.offset 0)) (not (= main_~end~0.base 0))) (or (not (= 0 (select (select |#memory_$Pointer$.offset| main_~end~0.base) (+ main_~end~0.offset 4)))) (not (= (select (select |#memory_$Pointer$.base| main_~end~0.base) (+ main_~end~0.offset 4)) 0))))' at error location [2023-04-02 21:36:34,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:36:34,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:36:34,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 17 [2023-04-02 21:36:34,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549039690] [2023-04-02 21:36:34,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:36:34,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 21:36:34,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:36:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 21:36:34,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1337, Unknown=4, NotChecked=0, Total=1482 [2023-04-02 21:36:34,899 INFO L87 Difference]: Start difference. First operand 185 states and 204 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:36:35,760 INFO L93 Difference]: Finished difference Result 354 states and 385 transitions. [2023-04-02 21:36:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 21:36:35,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-04-02 21:36:35,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:36:35,762 INFO L225 Difference]: With dead ends: 354 [2023-04-02 21:36:35,762 INFO L226 Difference]: Without dead ends: 327 [2023-04-02 21:36:35,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=242, Invalid=2304, Unknown=4, NotChecked=0, Total=2550 [2023-04-02 21:36:35,764 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 225 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 21:36:35,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 526 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 21:36:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-04-02 21:36:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 241. [2023-04-02 21:36:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.1144067796610169) internal successors, (263), 237 states have internal predecessors, (263), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 266 transitions. [2023-04-02 21:36:35,980 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 266 transitions. Word has length 51 [2023-04-02 21:36:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:36:35,980 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 266 transitions. [2023-04-02 21:36:35,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 266 transitions. [2023-04-02 21:36:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 21:36:35,981 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:36:35,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:36:35,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 21:36:36,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-04-02 21:36:36,182 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr11ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:36:36,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:36:36,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1936440677, now seen corresponding path program 3 times [2023-04-02 21:36:36,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:36:36,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383056418] [2023-04-02 21:36:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:36:36,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:36:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:36:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 21:36:38,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:36:38,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383056418] [2023-04-02 21:36:38,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383056418] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:36:38,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881112278] [2023-04-02 21:36:38,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 21:36:38,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:36:38,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:36:38,898 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:36:38,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 21:36:39,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 21:36:39,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:36:39,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-02 21:36:39,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:36:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:36:39,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:36:39,851 INFO L321 Elim1Store]: treesize reduction 12, result has 94.2 percent of original size [2023-04-02 21:36:39,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 12 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 281 [2023-04-02 21:36:40,017 INFO L321 Elim1Store]: treesize reduction 33, result has 80.1 percent of original size [2023-04-02 21:36:40,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 322 treesize of output 326 [2023-04-02 21:36:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:36:51,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881112278] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:36:51,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1955791273] [2023-04-02 21:36:51,859 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-04-02 21:36:51,859 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:36:51,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:36:51,859 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:36:51,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:36:51,868 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:36:52,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:36:52,479 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:36:55,583 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13347#(and (or (not (= main_~end~0.offset 0)) (not (= main_~end~0.base 0))) (or (not (= 0 (select (select |#memory_$Pointer$.offset| main_~end~0.base) (+ main_~end~0.offset 4)))) (not (= (select (select |#memory_$Pointer$.base| main_~end~0.base) (+ main_~end~0.offset 4)) 0))))' at error location [2023-04-02 21:36:55,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:36:55,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:36:55,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 28 [2023-04-02 21:36:55,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145708995] [2023-04-02 21:36:55,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:36:55,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-02 21:36:55,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:36:55,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-02 21:36:55,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2165, Unknown=1, NotChecked=0, Total=2352 [2023-04-02 21:36:55,586 INFO L87 Difference]: Start difference. First operand 241 states and 266 transitions. Second operand has 28 states, 28 states have (on average 5.142857142857143) internal successors, (144), 28 states have internal predecessors, (144), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:58,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:36:58,487 INFO L93 Difference]: Finished difference Result 773 states and 844 transitions. [2023-04-02 21:36:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-02 21:36:58,487 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.142857142857143) internal successors, (144), 28 states have internal predecessors, (144), 1 states have call successors, (2), 1 states have call predecessors, (2), 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 21:36:58,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:36:58,489 INFO L225 Difference]: With dead ends: 773 [2023-04-02 21:36:58,489 INFO L226 Difference]: Without dead ends: 630 [2023-04-02 21:36:58,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=770, Invalid=7601, Unknown=1, NotChecked=0, Total=8372 [2023-04-02 21:36:58,492 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1041 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1041 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:36:58,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1041 Valid, 1159 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 21:36:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2023-04-02 21:36:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 388. [2023-04-02 21:36:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 383 states have (on average 1.1279373368146215) internal successors, (432), 384 states have internal predecessors, (432), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 435 transitions. [2023-04-02 21:36:58,794 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 435 transitions. Word has length 56 [2023-04-02 21:36:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:36:58,794 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 435 transitions. [2023-04-02 21:36:58,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.142857142857143) internal successors, (144), 28 states have internal predecessors, (144), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:36:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 435 transitions. [2023-04-02 21:36:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 21:36:58,795 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:36:58,796 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:36:58,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 21:36:59,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-04-02 21:36:59,004 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr11ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:36:59,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:36:59,005 INFO L85 PathProgramCache]: Analyzing trace with hash -970068795, now seen corresponding path program 1 times [2023-04-02 21:36:59,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:36:59,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211052787] [2023-04-02 21:36:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:36:59,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:36:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:37:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:37:03,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:37:03,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211052787] [2023-04-02 21:37:03,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211052787] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:37:03,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132013593] [2023-04-02 21:37:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:37:03,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:37:03,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:37:03,604 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:37:03,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 21:37:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:37:03,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-02 21:37:04,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:37:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:37:04,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:37:04,729 INFO L321 Elim1Store]: treesize reduction 12, result has 94.6 percent of original size [2023-04-02 21:37:04,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 12 new quantified variables, introduced 15 case distinctions, treesize of input 152 treesize of output 305 [2023-04-02 21:37:04,890 INFO L321 Elim1Store]: treesize reduction 33, result has 80.1 percent of original size [2023-04-02 21:37:04,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 346 treesize of output 330 [2023-04-02 21:37:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 21:37:11,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132013593] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:37:11,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [241994319] [2023-04-02 21:37:11,679 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-04-02 21:37:11,679 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:37:11,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:37:11,679 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:37:11,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:37:11,691 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:37:12,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:37:12,352 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:37:15,734 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15487#(and (or (not (= main_~end~0.offset 0)) (not (= main_~end~0.base 0))) (or (not (= 0 (select (select |#memory_$Pointer$.offset| main_~end~0.base) (+ main_~end~0.offset 4)))) (not (= (select (select |#memory_$Pointer$.base| main_~end~0.base) (+ main_~end~0.offset 4)) 0))))' at error location [2023-04-02 21:37:15,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:37:15,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:37:15,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 10] total 32 [2023-04-02 21:37:15,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283834746] [2023-04-02 21:37:15,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:37:15,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-02 21:37:15,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:37:15,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-02 21:37:15,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=3071, Unknown=1, NotChecked=0, Total=3306 [2023-04-02 21:37:15,736 INFO L87 Difference]: Start difference. First operand 388 states and 435 transitions. Second operand has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:37:18,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:37:18,702 INFO L93 Difference]: Finished difference Result 812 states and 902 transitions. [2023-04-02 21:37:18,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-04-02 21:37:18,702 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-02 21:37:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:37:18,705 INFO L225 Difference]: With dead ends: 812 [2023-04-02 21:37:18,705 INFO L226 Difference]: Without dead ends: 810 [2023-04-02 21:37:18,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 135 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=676, Invalid=7513, Unknown=1, NotChecked=0, Total=8190 [2023-04-02 21:37:18,707 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 806 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 21:37:18,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [806 Valid, 1011 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 21:37:18,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2023-04-02 21:37:18,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 390. [2023-04-02 21:37:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 385 states have (on average 1.1246753246753247) internal successors, (433), 386 states have internal predecessors, (433), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:37:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 436 transitions. [2023-04-02 21:37:18,998 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 436 transitions. Word has length 58 [2023-04-02 21:37:18,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:37:18,998 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 436 transitions. [2023-04-02 21:37:19,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:37:19,005 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 436 transitions. [2023-04-02 21:37:19,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 21:37:19,010 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:37:19,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:37:19,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 21:37:19,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-04-02 21:37:19,211 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr12ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-04-02 21:37:19,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:37:19,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1859075145, now seen corresponding path program 1 times [2023-04-02 21:37:19,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:37:19,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136879261] [2023-04-02 21:37:19,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:37:19,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:37:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat