/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:12:53,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:12:53,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:12:53,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:12:53,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:12:53,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:12:53,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:12:53,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:12:53,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:12:53,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:12:53,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:12:53,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:12:53,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:12:53,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:12:53,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:12:53,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:12:53,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:12:53,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:12:53,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:12:53,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:12:53,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:12:53,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:12:53,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:12:53,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:12:53,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:12:53,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:12:53,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:12:53,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:12:53,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:12:53,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:12:53,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:12:53,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:12:53,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:12:53,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:12:53,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:12:53,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:12:53,463 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 [2023-03-31 22:12:53,482 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:12:53,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:12:53,482 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:12:53,482 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:12:53,483 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:12:53,483 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:12:53,483 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:12:53,483 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:12:53,483 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:12:53,483 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:12:53,483 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:12:53,483 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:12:53,484 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:12:53,484 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:12:53,484 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:12:53,484 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:12:53,484 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:12:53,484 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:12:53,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:12:53,484 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:12:53,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:12:53,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:12:53,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:12:53,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:12:53,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:12:53,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:12:53,485 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:12:53,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:12:53,486 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:12:53,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:12:53,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:12:53,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:12:53,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:12:53,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:12:53,486 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:12:53,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:12:53,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:12:53,487 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:12:53,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:12:53,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:12:53,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:12:53,487 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:12:53,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:12:53,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:12:53,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:12:53,712 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:12:53,717 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:12:53,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label34.c [2023-03-31 22:12:54,692 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:12:54,946 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:12:54,946 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label34.c [2023-03-31 22:12:54,959 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eafe71a63/88d11429bbad483db59374f4da650e78/FLAG6c2981d12 [2023-03-31 22:12:54,969 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eafe71a63/88d11429bbad483db59374f4da650e78 [2023-03-31 22:12:54,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:12:54,972 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:12:54,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:12:54,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:12:54,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:12:54,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:12:54" (1/1) ... [2023-03-31 22:12:54,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32964f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:54, skipping insertion in model container [2023-03-31 22:12:54,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:12:54" (1/1) ... [2023-03-31 22:12:54,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:12:55,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:12:55,184 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/eca-rers2012/Problem15_label34.c[1804,1817] [2023-03-31 22:12:55,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:12:55,480 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:12:55,497 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/eca-rers2012/Problem15_label34.c[1804,1817] [2023-03-31 22:12:55,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:12:55,713 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:12:55,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:55 WrapperNode [2023-03-31 22:12:55,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:12:55,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:12:55,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:12:55,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:12:55,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:55" (1/1) ... [2023-03-31 22:12:55,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:55" (1/1) ... [2023-03-31 22:12:55,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:55" (1/1) ... [2023-03-31 22:12:55,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:55" (1/1) ... [2023-03-31 22:12:55,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:55" (1/1) ... [2023-03-31 22:12:55,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:55" (1/1) ... [2023-03-31 22:12:55,837 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:55" (1/1) ... [2023-03-31 22:12:55,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:55" (1/1) ... [2023-03-31 22:12:55,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:12:55,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:12:55,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:12:55,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:12:55,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:55" (1/1) ... [2023-03-31 22:12:55,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:12:55,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:12:55,894 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) [2023-03-31 22:12:55,898 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 [2023-03-31 22:12:55,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:12:55,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:12:55,924 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:12:55,925 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:12:55,926 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:12:55,926 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:12:55,926 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:12:55,926 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:12:55,926 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:12:55,926 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:12:55,926 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:12:55,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:12:55,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:12:55,926 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:12:55,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:12:55,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:12:55,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:12:55,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:12:55,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:12:55,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:12:55,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:12:55,999 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:12:56,000 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:12:57,974 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:12:58,533 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:12:58,533 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:12:58,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:12:58 BoogieIcfgContainer [2023-03-31 22:12:58,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:12:58,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:12:58,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:12:58,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:12:58,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:12:54" (1/3) ... [2023-03-31 22:12:58,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad946b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:12:58, skipping insertion in model container [2023-03-31 22:12:58,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:55" (2/3) ... [2023-03-31 22:12:58,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad946b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:12:58, skipping insertion in model container [2023-03-31 22:12:58,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:12:58" (3/3) ... [2023-03-31 22:12:58,543 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label34.c [2023-03-31 22:12:58,557 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:12:58,557 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:12:58,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:12:58,609 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;@631d1fef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:12:58,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:12:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:12:58,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:12:58,619 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:12:58,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:12:58,620 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:12:58,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:12:58,623 INFO L85 PathProgramCache]: Analyzing trace with hash 271511491, now seen corresponding path program 1 times [2023-03-31 22:12:58,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:12:58,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336037275] [2023-03-31 22:12:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:12:58,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:12:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:12:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:12:58,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:12:58,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336037275] [2023-03-31 22:12:58,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336037275] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:12:58,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:12:58,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:12:58,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365611566] [2023-03-31 22:12:58,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:12:58,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:12:58,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:12:58,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:12:58,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:12:58,898 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:13:00,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:13:00,746 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:13:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:13:00,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:13:00,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:13:00,760 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:13:00,760 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:13:00,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:13:00,767 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:13:00,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-31 22:13:00,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:13:00,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-03-31 22:13:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.5969498910675382) internal successors, (733), 459 states have internal predecessors, (733), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 22:13:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2023-03-31 22:13:00,834 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2023-03-31 22:13:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:13:00,835 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2023-03-31 22:13:00,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:13:00,835 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2023-03-31 22:13:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:13:00,836 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:13:00,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:13:00,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:13:00,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:13:00,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:13:00,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2074517709, now seen corresponding path program 1 times [2023-03-31 22:13:00,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:13:00,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099734460] [2023-03-31 22:13:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:00,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:13:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:00,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:13:00,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099734460] [2023-03-31 22:13:00,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099734460] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:13:00,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:13:00,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:13:00,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599188206] [2023-03-31 22:13:00,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:13:00,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:13:00,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:13:00,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:13:00,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:13:00,944 INFO L87 Difference]: Start difference. First operand 469 states and 744 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:13:02,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:13:02,226 INFO L93 Difference]: Finished difference Result 1395 states and 2229 transitions. [2023-03-31 22:13:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:13:02,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-03-31 22:13:02,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:13:02,232 INFO L225 Difference]: With dead ends: 1395 [2023-03-31 22:13:02,232 INFO L226 Difference]: Without dead ends: 931 [2023-03-31 22:13:02,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:13:02,234 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:13:02,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:13:02,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-03-31 22:13:02,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2023-03-31 22:13:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 913 states have (on average 1.3723986856516976) internal successors, (1253), 913 states have internal predecessors, (1253), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-03-31 22:13:02,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1276 transitions. [2023-03-31 22:13:02,268 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1276 transitions. Word has length 21 [2023-03-31 22:13:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:13:02,269 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1276 transitions. [2023-03-31 22:13:02,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:13:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1276 transitions. [2023-03-31 22:13:02,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-03-31 22:13:02,273 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:13:02,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-31 22:13:02,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:13:02,274 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:13:02,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:13:02,274 INFO L85 PathProgramCache]: Analyzing trace with hash 702217146, now seen corresponding path program 1 times [2023-03-31 22:13:02,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:13:02,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038018220] [2023-03-31 22:13:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:02,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:13:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-03-31 22:13:02,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:13:02,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038018220] [2023-03-31 22:13:02,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038018220] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:13:02,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:13:02,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:13:02,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058252183] [2023-03-31 22:13:02,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:13:02,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:13:02,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:13:02,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:13:02,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:13:02,520 INFO L87 Difference]: Start difference. First operand 929 states and 1276 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:13:04,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:13:04,365 INFO L93 Difference]: Finished difference Result 2350 states and 3356 transitions. [2023-03-31 22:13:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:13:04,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2023-03-31 22:13:04,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:13:04,370 INFO L225 Difference]: With dead ends: 2350 [2023-03-31 22:13:04,371 INFO L226 Difference]: Without dead ends: 1426 [2023-03-31 22:13:04,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:13:04,373 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 788 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:13:04,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 44 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-31 22:13:04,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2023-03-31 22:13:04,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1403. [2023-03-31 22:13:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1374 states have (on average 1.294759825327511) internal successors, (1779), 1379 states have internal predecessors, (1779), 12 states have call successors, (12), 12 states have call predecessors, (12), 16 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33) [2023-03-31 22:13:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1824 transitions. [2023-03-31 22:13:04,405 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1824 transitions. Word has length 67 [2023-03-31 22:13:04,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:13:04,405 INFO L495 AbstractCegarLoop]: Abstraction has 1403 states and 1824 transitions. [2023-03-31 22:13:04,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:13:04,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1824 transitions. [2023-03-31 22:13:04,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-03-31 22:13:04,410 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:13:04,410 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1] [2023-03-31 22:13:04,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:13:04,411 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:13:04,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:13:04,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2100322194, now seen corresponding path program 1 times [2023-03-31 22:13:04,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:13:04,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863380985] [2023-03-31 22:13:04,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:04,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:13:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 22:13:04,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:13:04,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863380985] [2023-03-31 22:13:04,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863380985] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:13:04,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:13:04,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:13:04,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120452107] [2023-03-31 22:13:04,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:13:04,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:13:04,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:13:04,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:13:04,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:13:04,772 INFO L87 Difference]: Start difference. First operand 1403 states and 1824 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:13:06,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:13:06,033 INFO L93 Difference]: Finished difference Result 3731 states and 4967 transitions. [2023-03-31 22:13:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:13:06,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 173 [2023-03-31 22:13:06,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:13:06,042 INFO L225 Difference]: With dead ends: 3731 [2023-03-31 22:13:06,043 INFO L226 Difference]: Without dead ends: 2333 [2023-03-31 22:13:06,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:13:06,047 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 247 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:13:06,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 408 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:13:06,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2023-03-31 22:13:06,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2320. [2023-03-31 22:13:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2280 states have (on average 1.2074561403508772) internal successors, (2753), 2288 states have internal predecessors, (2753), 16 states have call successors, (16), 16 states have call predecessors, (16), 23 states have return successors, (69), 15 states have call predecessors, (69), 15 states have call successors, (69) [2023-03-31 22:13:06,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 2838 transitions. [2023-03-31 22:13:06,106 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 2838 transitions. Word has length 173 [2023-03-31 22:13:06,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:13:06,106 INFO L495 AbstractCegarLoop]: Abstraction has 2320 states and 2838 transitions. [2023-03-31 22:13:06,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:13:06,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 2838 transitions. [2023-03-31 22:13:06,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-03-31 22:13:06,109 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:13:06,109 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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] [2023-03-31 22:13:06,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:13:06,109 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:13:06,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:13:06,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1140447666, now seen corresponding path program 1 times [2023-03-31 22:13:06,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:13:06,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386715046] [2023-03-31 22:13:06,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:06,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:13:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:06,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:13:06,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386715046] [2023-03-31 22:13:06,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386715046] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:13:06,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566060130] [2023-03-31 22:13:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:06,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:13:06,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:13:06,367 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) [2023-03-31 22:13:06,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:13:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:06,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:13:06,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:13:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:06,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:13:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:06,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566060130] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:13:06,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [791547726] [2023-03-31 22:13:06,796 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-03-31 22:13:06,796 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:13:06,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:13:06,804 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:13:06,807 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:13:06,966 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-03-31 22:13:07,137 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-03-31 22:13:07,252 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 54 [2023-03-31 22:13:07,740 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8866 conjuctions. This might take some time... [2023-03-31 22:13:07,864 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 74 conjuctions. [2023-03-31 22:13:08,641 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 42 for LOIs [2023-03-31 22:13:08,657 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-03-31 22:13:13,164 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 54