/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/eca-rers2012/Problem03_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:22:21,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:22:21,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:22:21,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 03:22:21,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:22:21,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:22:21,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:22:21,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:22:21,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:22:21,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:22:21,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:22:21,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:22:21,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:22:21,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:22:21,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:22:21,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:22:21,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 03:22:21,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:22:21,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:22:21,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:22:21,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:22:21,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:22:21,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:22:21,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:22:21,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:22:21,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:22:21,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:22:21,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:22:21,593 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 [2023-04-01 03:22:21,624 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:22:21,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:22:21,625 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:22:21,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:22:21,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:22:21,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:22:21,626 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:22:21,626 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:22:21,626 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:22:21,626 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:22:21,626 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:22:21,627 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:22:21,627 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:22:21,627 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:22:21,627 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:22:21,627 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:22:21,627 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:22:21,627 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:22:21,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:22:21,628 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:22:21,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:22:21,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:22:21,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:22:21,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:22:21,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:22:21,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:22:21,629 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:22:21,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:22:21,629 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:22:21,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:22:21,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:22:21,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:22:21,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:22:21,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:22:21,630 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:22:21,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:22:21,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:22:21,631 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:22:21,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:22:21,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:22:21,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:22:21,631 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:22:21,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:22:21,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:22:21,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:22:21,890 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:22:21,890 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:22:21,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label31.c [2023-04-01 03:22:23,119 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:22:23,509 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:22:23,510 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label31.c [2023-04-01 03:22:23,523 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6846ec10/7648fc0e230d43509cae9f021f5dda94/FLAGb2c1390cd [2023-04-01 03:22:23,534 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6846ec10/7648fc0e230d43509cae9f021f5dda94 [2023-04-01 03:22:23,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:22:23,537 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:22:23,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:22:23,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:22:23,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:22:23,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:22:23" (1/1) ... [2023-04-01 03:22:23,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23dfe1a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:23, skipping insertion in model container [2023-04-01 03:22:23,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:22:23" (1/1) ... [2023-04-01 03:22:23,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:22:23,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:22:24,114 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/Problem03_label31.c[54594,54607] [2023-04-01 03:22:24,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:22:24,169 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:22:24,375 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/Problem03_label31.c[54594,54607] [2023-04-01 03:22:24,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:22:24,409 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:22:24,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:24 WrapperNode [2023-04-01 03:22:24,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:22:24,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:22:24,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:22:24,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:22:24,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:24" (1/1) ... [2023-04-01 03:22:24,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:24" (1/1) ... [2023-04-01 03:22:24,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:24" (1/1) ... [2023-04-01 03:22:24,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:24" (1/1) ... [2023-04-01 03:22:24,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:24" (1/1) ... [2023-04-01 03:22:24,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:24" (1/1) ... [2023-04-01 03:22:24,590 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:24" (1/1) ... [2023-04-01 03:22:24,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:24" (1/1) ... [2023-04-01 03:22:24,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:22:24,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:22:24,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:22:24,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:22:24,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:24" (1/1) ... [2023-04-01 03:22:24,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:22:24,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:22:24,653 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) [2023-04-01 03:22:24,661 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 [2023-04-01 03:22:24,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:22:24,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:22:24,693 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:22:24,694 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:22:24,694 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:22:24,694 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:22:24,694 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:22:24,694 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:22:24,694 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:22:24,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:22:24,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:22:24,694 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:22:24,695 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:22:24,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:22:24,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:22:24,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:22:24,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:22:24,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:22:24,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:22:24,806 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:22:24,809 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:22:26,697 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:22:27,099 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:22:27,099 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:22:27,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:22:27 BoogieIcfgContainer [2023-04-01 03:22:27,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:22:27,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:22:27,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:22:27,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:22:27,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:22:23" (1/3) ... [2023-04-01 03:22:27,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340f2697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:22:27, skipping insertion in model container [2023-04-01 03:22:27,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:22:24" (2/3) ... [2023-04-01 03:22:27,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340f2697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:22:27, skipping insertion in model container [2023-04-01 03:22:27,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:22:27" (3/3) ... [2023-04-01 03:22:27,111 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label31.c [2023-04-01 03:22:27,128 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:22:27,128 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:22:27,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:22:27,203 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;@1e9eb10a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:22:27,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:22:27,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:22:27,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 03:22:27,228 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:22:27,229 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:22:27,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:22:27,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:22:27,236 INFO L85 PathProgramCache]: Analyzing trace with hash 597482371, now seen corresponding path program 1 times [2023-04-01 03:22:27,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:22:27,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288476062] [2023-04-01 03:22:27,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:27,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:22:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:28,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:22:28,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288476062] [2023-04-01 03:22:28,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288476062] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:22:28,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:22:28,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:22:28,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269911480] [2023-04-01 03:22:28,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:22:28,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:22:28,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:22:28,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:22:28,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:22:28,568 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 03:22:29,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:22:29,260 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-01 03:22:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:22:29,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 149 [2023-04-01 03:22:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:22:29,293 INFO L225 Difference]: With dead ends: 462 [2023-04-01 03:22:29,293 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 03:22:29,299 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 [2023-04-01 03:22:29,305 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 03:22:29,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 78 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 03:22:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 03:22:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-01 03:22:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.9112627986348123) internal successors, (560), 293 states have internal predecessors, (560), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 03:22:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 569 transitions. [2023-04-01 03:22:29,387 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 569 transitions. Word has length 149 [2023-04-01 03:22:29,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:22:29,390 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 569 transitions. [2023-04-01 03:22:29,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 03:22:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 569 transitions. [2023-04-01 03:22:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-01 03:22:29,404 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:22:29,405 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:22:29,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:22:29,405 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:22:29,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:22:29,406 INFO L85 PathProgramCache]: Analyzing trace with hash 581360414, now seen corresponding path program 1 times [2023-04-01 03:22:29,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:22:29,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143559296] [2023-04-01 03:22:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:29,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:22:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:30,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:22:30,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143559296] [2023-04-01 03:22:30,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143559296] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:22:30,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:22:30,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:22:30,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203397548] [2023-04-01 03:22:30,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:22:30,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:22:30,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:22:30,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:22:30,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:22:30,381 INFO L87 Difference]: Start difference. First operand 301 states and 569 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:22:31,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:22:31,273 INFO L93 Difference]: Finished difference Result 919 states and 1760 transitions. [2023-04-01 03:22:31,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:22:31,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 157 [2023-04-01 03:22:31,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:22:31,280 INFO L225 Difference]: With dead ends: 919 [2023-04-01 03:22:31,280 INFO L226 Difference]: Without dead ends: 623 [2023-04-01 03:22:31,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:22:31,283 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 579 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 03:22:31,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 46 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 03:22:31,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2023-04-01 03:22:31,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 605. [2023-04-01 03:22:31,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 588 states have (on average 1.8741496598639455) internal successors, (1102), 593 states have internal predecessors, (1102), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-04-01 03:22:31,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1135 transitions. [2023-04-01 03:22:31,321 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1135 transitions. Word has length 157 [2023-04-01 03:22:31,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:22:31,321 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1135 transitions. [2023-04-01 03:22:31,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:22:31,322 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1135 transitions. [2023-04-01 03:22:31,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 03:22:31,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:22:31,325 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:22:31,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:22:31,326 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:22:31,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:22:31,326 INFO L85 PathProgramCache]: Analyzing trace with hash 15657021, now seen corresponding path program 1 times [2023-04-01 03:22:31,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:22:31,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63344013] [2023-04-01 03:22:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:31,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:22:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:31,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:22:31,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63344013] [2023-04-01 03:22:31,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63344013] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:22:31,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:22:31,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:22:31,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212385718] [2023-04-01 03:22:31,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:22:31,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:22:31,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:22:31,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:22:31,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:22:31,759 INFO L87 Difference]: Start difference. First operand 605 states and 1135 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:22:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:22:32,317 INFO L93 Difference]: Finished difference Result 1837 states and 3515 transitions. [2023-04-01 03:22:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 03:22:32,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 158 [2023-04-01 03:22:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:22:32,325 INFO L225 Difference]: With dead ends: 1837 [2023-04-01 03:22:32,325 INFO L226 Difference]: Without dead ends: 1237 [2023-04-01 03:22:32,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 03:22:32,328 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 774 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 03:22:32,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 528 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 03:22:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2023-04-01 03:22:32,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1215. [2023-04-01 03:22:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1179 states have (on average 1.8634435962680238) internal successors, (2197), 1195 states have internal predecessors, (2197), 10 states have call successors, (10), 10 states have call predecessors, (10), 25 states have return successors, (97), 9 states have call predecessors, (97), 9 states have call successors, (97) [2023-04-01 03:22:32,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2304 transitions. [2023-04-01 03:22:32,381 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2304 transitions. Word has length 158 [2023-04-01 03:22:32,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:22:32,382 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 2304 transitions. [2023-04-01 03:22:32,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:22:32,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2304 transitions. [2023-04-01 03:22:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 03:22:32,387 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:22:32,387 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:22:32,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 03:22:32,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:22:32,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:22:32,388 INFO L85 PathProgramCache]: Analyzing trace with hash -848600222, now seen corresponding path program 1 times [2023-04-01 03:22:32,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:22:32,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224137414] [2023-04-01 03:22:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:32,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:22:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:32,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:22:32,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224137414] [2023-04-01 03:22:32,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224137414] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:22:32,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:22:32,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:22:32,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291446845] [2023-04-01 03:22:32,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:22:32,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:22:32,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:22:32,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:22:32,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:22:32,781 INFO L87 Difference]: Start difference. First operand 1215 states and 2304 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:22:33,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:22:33,755 INFO L93 Difference]: Finished difference Result 3753 states and 7457 transitions. [2023-04-01 03:22:33,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:22:33,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 161 [2023-04-01 03:22:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:22:33,783 INFO L225 Difference]: With dead ends: 3753 [2023-04-01 03:22:33,784 INFO L226 Difference]: Without dead ends: 2543 [2023-04-01 03:22:33,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:22:33,796 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 493 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 03:22:33,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 44 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 03:22:33,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2023-04-01 03:22:33,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2495. [2023-04-01 03:22:33,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2391 states have (on average 1.8046842325386867) internal successors, (4315), 2459 states have internal predecessors, (4315), 18 states have call successors, (18), 18 states have call predecessors, (18), 85 states have return successors, (415), 17 states have call predecessors, (415), 17 states have call successors, (415) [2023-04-01 03:22:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 4748 transitions. [2023-04-01 03:22:33,980 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 4748 transitions. Word has length 161 [2023-04-01 03:22:33,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:22:33,980 INFO L495 AbstractCegarLoop]: Abstraction has 2495 states and 4748 transitions. [2023-04-01 03:22:33,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:22:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 4748 transitions. [2023-04-01 03:22:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 03:22:33,992 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:22:33,992 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:22:33,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 03:22:33,993 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:22:33,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:22:33,994 INFO L85 PathProgramCache]: Analyzing trace with hash 973346165, now seen corresponding path program 1 times [2023-04-01 03:22:33,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:22:33,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522010590] [2023-04-01 03:22:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:33,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:22:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:34,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:22:34,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522010590] [2023-04-01 03:22:34,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522010590] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:22:34,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:22:34,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:22:34,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080678874] [2023-04-01 03:22:34,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:22:34,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:22:34,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:22:34,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:22:34,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:22:34,425 INFO L87 Difference]: Start difference. First operand 2495 states and 4748 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:22:35,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:22:35,482 INFO L93 Difference]: Finished difference Result 7677 states and 15861 transitions. [2023-04-01 03:22:35,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:22:35,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 162 [2023-04-01 03:22:35,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:22:35,518 INFO L225 Difference]: With dead ends: 7677 [2023-04-01 03:22:35,518 INFO L226 Difference]: Without dead ends: 5187 [2023-04-01 03:22:35,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:22:35,529 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 506 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 03:22:35,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 39 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 03:22:35,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5187 states. [2023-04-01 03:22:35,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5187 to 5115. [2023-04-01 03:22:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5115 states, 4845 states have (on average 1.5572755417956656) internal successors, (7545), 5047 states have internal predecessors, (7545), 34 states have call successors, (34), 34 states have call predecessors, (34), 235 states have return successors, (1320), 33 states have call predecessors, (1320), 33 states have call successors, (1320) [2023-04-01 03:22:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5115 states to 5115 states and 8899 transitions. [2023-04-01 03:22:35,778 INFO L78 Accepts]: Start accepts. Automaton has 5115 states and 8899 transitions. Word has length 162 [2023-04-01 03:22:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:22:35,779 INFO L495 AbstractCegarLoop]: Abstraction has 5115 states and 8899 transitions. [2023-04-01 03:22:35,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:22:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 5115 states and 8899 transitions. [2023-04-01 03:22:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-01 03:22:35,794 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:22:35,795 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:22:35,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 03:22:35,795 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:22:35,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:22:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1089814334, now seen corresponding path program 1 times [2023-04-01 03:22:35,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:22:35,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218301249] [2023-04-01 03:22:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:22:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:36,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:22:36,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218301249] [2023-04-01 03:22:36,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218301249] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:22:36,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:22:36,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:22:36,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178671445] [2023-04-01 03:22:36,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:22:36,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:22:36,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:22:36,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:22:36,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:22:36,709 INFO L87 Difference]: Start difference. First operand 5115 states and 8899 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:22:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:22:37,858 INFO L93 Difference]: Finished difference Result 11897 states and 21008 transitions. [2023-04-01 03:22:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:22:37,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 163 [2023-04-01 03:22:37,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:22:37,904 INFO L225 Difference]: With dead ends: 11897 [2023-04-01 03:22:37,904 INFO L226 Difference]: Without dead ends: 6787 [2023-04-01 03:22:37,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 03:22:37,922 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 448 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 03:22:37,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 55 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 03:22:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6787 states. [2023-04-01 03:22:38,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6787 to 6709. [2023-04-01 03:22:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6709 states, 6357 states have (on average 1.5279219757747364) internal successors, (9713), 6621 states have internal predecessors, (9713), 44 states have call successors, (44), 44 states have call predecessors, (44), 307 states have return successors, (1848), 43 states have call predecessors, (1848), 43 states have call successors, (1848) [2023-04-01 03:22:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 11605 transitions. [2023-04-01 03:22:38,361 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 11605 transitions. Word has length 163 [2023-04-01 03:22:38,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:22:38,361 INFO L495 AbstractCegarLoop]: Abstraction has 6709 states and 11605 transitions. [2023-04-01 03:22:38,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:22:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 11605 transitions. [2023-04-01 03:22:38,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-01 03:22:38,382 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:22:38,383 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:22:38,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 03:22:38,383 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:22:38,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:22:38,384 INFO L85 PathProgramCache]: Analyzing trace with hash 375255834, now seen corresponding path program 1 times [2023-04-01 03:22:38,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:22:38,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975797343] [2023-04-01 03:22:38,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:38,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:22:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:38,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:22:38,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975797343] [2023-04-01 03:22:38,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975797343] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:22:38,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:22:38,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:22:38,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090260214] [2023-04-01 03:22:38,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:22:38,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:22:38,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:22:38,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:22:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:22:38,783 INFO L87 Difference]: Start difference. First operand 6709 states and 11605 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:22:39,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:22:39,863 INFO L93 Difference]: Finished difference Result 19193 states and 35059 transitions. [2023-04-01 03:22:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:22:39,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 165 [2023-04-01 03:22:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:22:39,965 INFO L225 Difference]: With dead ends: 19193 [2023-04-01 03:22:39,965 INFO L226 Difference]: Without dead ends: 12489 [2023-04-01 03:22:39,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:22:39,995 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 516 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 03:22:39,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 44 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 03:22:40,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12489 states. [2023-04-01 03:22:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12489 to 12327. [2023-04-01 03:22:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12327 states, 11740 states have (on average 1.4454855195911414) internal successors, (16970), 12167 states have internal predecessors, (16970), 80 states have call successors, (80), 80 states have call predecessors, (80), 506 states have return successors, (3399), 79 states have call predecessors, (3399), 79 states have call successors, (3399) [2023-04-01 03:22:40,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12327 states to 12327 states and 20449 transitions. [2023-04-01 03:22:40,523 INFO L78 Accepts]: Start accepts. Automaton has 12327 states and 20449 transitions. Word has length 165 [2023-04-01 03:22:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:22:40,524 INFO L495 AbstractCegarLoop]: Abstraction has 12327 states and 20449 transitions. [2023-04-01 03:22:40,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:22:40,525 INFO L276 IsEmpty]: Start isEmpty. Operand 12327 states and 20449 transitions. [2023-04-01 03:22:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-01 03:22:40,557 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:22:40,558 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:22:40,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 03:22:40,558 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:22:40,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:22:40,559 INFO L85 PathProgramCache]: Analyzing trace with hash 153636837, now seen corresponding path program 1 times [2023-04-01 03:22:40,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:22:40,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745320513] [2023-04-01 03:22:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:40,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:22:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:41,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:22:41,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745320513] [2023-04-01 03:22:41,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745320513] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:22:41,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341793245] [2023-04-01 03:22:41,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:41,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:22:41,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:22:41,190 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) [2023-04-01 03:22:41,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 03:22:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:41,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:22:41,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:22:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:41,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:22:41,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341793245] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:22:41,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:22:41,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 03:22:41,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057964005] [2023-04-01 03:22:41,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:22:41,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:22:41,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:22:41,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:22:41,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 03:22:41,732 INFO L87 Difference]: Start difference. First operand 12327 states and 20449 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2023-04-01 03:22:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:22:42,629 INFO L93 Difference]: Finished difference Result 30161 states and 49165 transitions. [2023-04-01 03:22:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:22:42,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 170 [2023-04-01 03:22:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:22:42,736 INFO L225 Difference]: With dead ends: 30161 [2023-04-01 03:22:42,737 INFO L226 Difference]: Without dead ends: 18137 [2023-04-01 03:22:42,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 03:22:42,783 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 03:22:42,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 284 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 03:22:42,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18137 states. [2023-04-01 03:22:43,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18137 to 18137. [2023-04-01 03:22:43,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18137 states, 17362 states have (on average 1.3634373920055294) internal successors, (23672), 17901 states have internal predecessors, (23672), 118 states have call successors, (118), 118 states have call predecessors, (118), 656 states have return successors, (4651), 117 states have call predecessors, (4651), 117 states have call successors, (4651) [2023-04-01 03:22:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18137 states to 18137 states and 28441 transitions. [2023-04-01 03:22:43,591 INFO L78 Accepts]: Start accepts. Automaton has 18137 states and 28441 transitions. Word has length 170 [2023-04-01 03:22:43,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:22:43,592 INFO L495 AbstractCegarLoop]: Abstraction has 18137 states and 28441 transitions. [2023-04-01 03:22:43,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2023-04-01 03:22:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand 18137 states and 28441 transitions. [2023-04-01 03:22:43,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-04-01 03:22:43,647 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:22:43,647 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2023-04-01 03:22:43,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 03:22:43,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:22:43,858 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:22:43,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:22:43,859 INFO L85 PathProgramCache]: Analyzing trace with hash 254692750, now seen corresponding path program 1 times [2023-04-01 03:22:43,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:22:43,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546933820] [2023-04-01 03:22:43,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:43,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:22:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 03:22:44,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:22:44,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546933820] [2023-04-01 03:22:44,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546933820] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:22:44,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706543245] [2023-04-01 03:22:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:22:44,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:22:44,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:22:44,373 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) [2023-04-01 03:22:44,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 03:22:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:22:44,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 03:22:44,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:22:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:44,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:22:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:22:44,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706543245] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:22:44,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1413978525] [2023-04-01 03:22:44,955 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-01 03:22:44,955 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:22:44,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:22:44,963 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:22:44,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:22:46,022 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-04-01 03:22:56,504 WARN L223 SmtUtils]: Spent 9.15s on a formula simplification that was a NOOP. DAG size: 962 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)