/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/Problem03_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:22:29,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:22:29,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:22:29,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:22:29,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:22:29,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:22:29,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:22:29,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:22:29,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:22:29,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:22:29,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:22:29,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2023-03-31 21:22:29,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:22:29,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:22:29,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:22:29,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:22:29,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:22:29,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:22:29,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:22:29,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:22:29,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:22:29,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:22:29,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:22:29,124 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 21:22:29,146 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:22:29,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:22:29,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:22:29,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:22:29,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:22:29,147 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:22:29,148 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:22:29,148 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:22:29,148 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:22:29,148 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:22:29,148 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:22:29,148 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:22:29,149 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:22:29,149 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:22:29,149 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:22:29,149 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:22:29,149 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:22:29,149 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:22:29,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:22:29,149 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:22:29,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:22:29,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:22:29,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:22:29,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:22:29,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:22:29,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:22:29,150 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:22:29,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:22:29,150 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:22:29,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:22:29,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:22:29,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:22:29,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:22:29,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:22:29,151 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:22:29,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:22:29,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:22:29,151 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:22:29,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:22:29,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:22:29,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:22:29,152 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:22:29,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:22:29,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:22:29,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:22:29,367 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:22:29,368 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:22:29,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label58.c [2023-03-31 21:22:30,392 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:22:30,658 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:22:30,658 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label58.c [2023-03-31 21:22:30,675 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4936d43dc/165037724bec4df7a6e51a972f792414/FLAG063561256 [2023-03-31 21:22:30,688 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4936d43dc/165037724bec4df7a6e51a972f792414 [2023-03-31 21:22:30,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:22:30,692 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:22:30,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:22:30,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:22:30,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:22:30,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:22:30" (1/1) ... [2023-03-31 21:22:30,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@771ef22d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:30, skipping insertion in model container [2023-03-31 21:22:30,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:22:30" (1/1) ... [2023-03-31 21:22:30,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:22:30,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:22:31,165 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_label58.c[55815,55828] [2023-03-31 21:22:31,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:22:31,200 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:22:31,362 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_label58.c[55815,55828] [2023-03-31 21:22:31,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:22:31,388 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:22:31,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:31 WrapperNode [2023-03-31 21:22:31,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:22:31,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:22:31,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:22:31,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:22:31,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:31" (1/1) ... [2023-03-31 21:22:31,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:31" (1/1) ... [2023-03-31 21:22:31,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:31" (1/1) ... [2023-03-31 21:22:31,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:31" (1/1) ... [2023-03-31 21:22:31,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:31" (1/1) ... [2023-03-31 21:22:31,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:31" (1/1) ... [2023-03-31 21:22:31,497 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:31" (1/1) ... [2023-03-31 21:22:31,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:31" (1/1) ... [2023-03-31 21:22:31,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:22:31,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:22:31,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:22:31,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:22:31,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:31" (1/1) ... [2023-03-31 21:22:31,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:22:31,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:22:31,559 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 21:22:31,564 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 21:22:31,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:22:31,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:22:31,585 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:22:31,585 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:22:31,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:22:31,585 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:22:31,585 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:22:31,585 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:22:31,585 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:22:31,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:22:31,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:22:31,585 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:22:31,585 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:22:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:22:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:22:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:22:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:22:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:22:31,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:22:31,687 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:22:31,688 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:22:32,990 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:22:33,201 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:22:33,202 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:22:33,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:22:33 BoogieIcfgContainer [2023-03-31 21:22:33,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:22:33,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:22:33,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:22:33,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:22:33,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:22:30" (1/3) ... [2023-03-31 21:22:33,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a292ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:22:33, skipping insertion in model container [2023-03-31 21:22:33,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:31" (2/3) ... [2023-03-31 21:22:33,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a292ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:22:33, skipping insertion in model container [2023-03-31 21:22:33,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:22:33" (3/3) ... [2023-03-31 21:22:33,213 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label58.c [2023-03-31 21:22:33,224 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:22:33,224 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:22:33,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:22:33,268 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;@5c629725, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:22:33,268 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:22:33,273 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) [2023-03-31 21:22:33,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-03-31 21:22:33,283 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:33,283 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] [2023-03-31 21:22:33,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:33,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:33,287 INFO L85 PathProgramCache]: Analyzing trace with hash 729851665, now seen corresponding path program 1 times [2023-03-31 21:22:33,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:33,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207144074] [2023-03-31 21:22:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:33,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:34,111 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 21:22:34,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:34,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207144074] [2023-03-31 21:22:34,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207144074] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:34,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:22:34,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:22:34,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369488278] [2023-03-31 21:22:34,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:34,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:22:34,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:34,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:22:34,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:22:34,139 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) [2023-03-31 21:22:34,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:34,760 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-03-31 21:22:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:22:34,761 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 [2023-03-31 21:22:34,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:34,770 INFO L225 Difference]: With dead ends: 462 [2023-03-31 21:22:34,771 INFO L226 Difference]: Without dead ends: 301 [2023-03-31 21:22:34,773 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 21:22:34,775 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 43 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:34,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 70 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 21:22:34,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-03-31 21:22:34,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-03-31 21:22:34,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.795221843003413) internal successors, (526), 293 states have internal predecessors, (526), 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) [2023-03-31 21:22:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 535 transitions. [2023-03-31 21:22:34,818 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 535 transitions. Word has length 149 [2023-03-31 21:22:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:34,818 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 535 transitions. [2023-03-31 21:22:34,819 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) [2023-03-31 21:22:34,819 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 535 transitions. [2023-03-31 21:22:34,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-03-31 21:22:34,821 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:34,821 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] [2023-03-31 21:22:34,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:22:34,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:34,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:34,822 INFO L85 PathProgramCache]: Analyzing trace with hash -455555728, now seen corresponding path program 1 times [2023-03-31 21:22:34,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:34,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034069212] [2023-03-31 21:22:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:34,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:35,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:35,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034069212] [2023-03-31 21:22:35,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034069212] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:35,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:22:35,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:22:35,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683470036] [2023-03-31 21:22:35,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:35,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:22:35,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:35,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:22:35,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:22:35,238 INFO L87 Difference]: Start difference. First operand 301 states and 535 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) [2023-03-31 21:22:35,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:35,989 INFO L93 Difference]: Finished difference Result 917 states and 1650 transitions. [2023-03-31 21:22:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:22:35,991 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 [2023-03-31 21:22:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:35,995 INFO L225 Difference]: With dead ends: 917 [2023-03-31 21:22:35,995 INFO L226 Difference]: Without dead ends: 621 [2023-03-31 21:22:35,996 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 [2023-03-31 21:22:36,000 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 491 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:36,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 44 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 21:22:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2023-03-31 21:22:36,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 609. [2023-03-31 21:22:36,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 590 states have (on average 1.7457627118644068) internal successors, (1030), 597 states have internal predecessors, (1030), 6 states have call successors, (6), 6 states have call predecessors, (6), 12 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2023-03-31 21:22:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1064 transitions. [2023-03-31 21:22:36,036 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1064 transitions. Word has length 161 [2023-03-31 21:22:36,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:36,036 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 1064 transitions. [2023-03-31 21:22:36,036 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) [2023-03-31 21:22:36,037 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1064 transitions. [2023-03-31 21:22:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-03-31 21:22:36,039 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:36,039 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-03-31 21:22:36,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:22:36,040 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:36,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash -897330919, now seen corresponding path program 1 times [2023-03-31 21:22:36,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:36,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185118136] [2023-03-31 21:22:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:36,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:36,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:36,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185118136] [2023-03-31 21:22:36,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185118136] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:36,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:22:36,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:22:36,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663898342] [2023-03-31 21:22:36,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:36,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:22:36,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:36,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:22:36,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:22:36,299 INFO L87 Difference]: Start difference. First operand 609 states and 1064 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2023-03-31 21:22:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:36,728 INFO L93 Difference]: Finished difference Result 1213 states and 2139 transitions. [2023-03-31 21:22:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 21:22:36,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 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 166 [2023-03-31 21:22:36,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:36,739 INFO L225 Difference]: With dead ends: 1213 [2023-03-31 21:22:36,740 INFO L226 Difference]: Without dead ends: 609 [2023-03-31 21:22:36,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:22:36,742 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 511 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:36,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 20 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:22:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2023-03-31 21:22:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2023-03-31 21:22:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 590 states have (on average 1.6610169491525424) internal successors, (980), 597 states have internal predecessors, (980), 6 states have call successors, (6), 6 states have call predecessors, (6), 12 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2023-03-31 21:22:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1014 transitions. [2023-03-31 21:22:36,755 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1014 transitions. Word has length 166 [2023-03-31 21:22:36,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:36,755 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 1014 transitions. [2023-03-31 21:22:36,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2023-03-31 21:22:36,756 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1014 transitions. [2023-03-31 21:22:36,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-03-31 21:22:36,758 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:36,758 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-03-31 21:22:36,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:22:36,759 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:36,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:36,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1563350183, now seen corresponding path program 1 times [2023-03-31 21:22:36,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:36,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484038591] [2023-03-31 21:22:36,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:36,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:22:37,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:37,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484038591] [2023-03-31 21:22:37,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484038591] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:22:37,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344310375] [2023-03-31 21:22:37,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:37,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:22:37,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:22:37,070 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 21:22:37,116 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 21:22:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:37,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:22:37,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:22:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 21:22:37,381 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:22:37,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344310375] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:37,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:22:37,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 21:22:37,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426110967] [2023-03-31 21:22:37,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:37,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:22:37,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:37,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:22:37,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:22:37,384 INFO L87 Difference]: Start difference. First operand 609 states and 1014 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 4 states have internal predecessors, (158), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:22:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:38,022 INFO L93 Difference]: Finished difference Result 1863 states and 3255 transitions. [2023-03-31 21:22:38,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:22:38,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 4 states have internal predecessors, (158), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 171 [2023-03-31 21:22:38,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:38,032 INFO L225 Difference]: With dead ends: 1863 [2023-03-31 21:22:38,032 INFO L226 Difference]: Without dead ends: 1259 [2023-03-31 21:22:38,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:22:38,035 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 542 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:38,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 37 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 21:22:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2023-03-31 21:22:38,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1225. [2023-03-31 21:22:38,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1184 states have (on average 1.5650337837837838) internal successors, (1853), 1205 states have internal predecessors, (1853), 10 states have call successors, (10), 10 states have call predecessors, (10), 30 states have return successors, (122), 9 states have call predecessors, (122), 9 states have call successors, (122) [2023-03-31 21:22:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1985 transitions. [2023-03-31 21:22:38,083 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1985 transitions. Word has length 171 [2023-03-31 21:22:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:38,084 INFO L495 AbstractCegarLoop]: Abstraction has 1225 states and 1985 transitions. [2023-03-31 21:22:38,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 4 states have internal predecessors, (158), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:22:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1985 transitions. [2023-03-31 21:22:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-03-31 21:22:38,090 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:38,090 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:22:38,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 21:22:38,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:22:38,297 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:38,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:38,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1415063026, now seen corresponding path program 1 times [2023-03-31 21:22:38,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:38,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654011850] [2023-03-31 21:22:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:38,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:22:39,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:39,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654011850] [2023-03-31 21:22:39,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654011850] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:22:39,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367581181] [2023-03-31 21:22:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:39,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:22:39,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:22:39,061 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) [2023-03-31 21:22:39,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:22:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:39,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 21:22:39,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:22:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:22:39,301 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:22:39,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367581181] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:39,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:22:39,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 21:22:39,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759382947] [2023-03-31 21:22:39,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:39,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:22:39,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:39,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:22:39,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:22:39,304 INFO L87 Difference]: Start difference. First operand 1225 states and 1985 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 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 21:22:39,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:39,617 INFO L93 Difference]: Finished difference Result 3743 states and 6322 transitions. [2023-03-31 21:22:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:22:39,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 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 172 [2023-03-31 21:22:39,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:39,627 INFO L225 Difference]: With dead ends: 3743 [2023-03-31 21:22:39,627 INFO L226 Difference]: Without dead ends: 2523 [2023-03-31 21:22:39,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:22:39,629 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 728 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:39,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 547 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:22:39,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2023-03-31 21:22:39,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 2485. [2023-03-31 21:22:39,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2485 states, 2386 states have (on average 1.559094719195306) internal successors, (3720), 2449 states have internal predecessors, (3720), 18 states have call successors, (18), 18 states have call predecessors, (18), 80 states have return successors, (369), 17 states have call predecessors, (369), 17 states have call successors, (369) [2023-03-31 21:22:39,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2485 states to 2485 states and 4107 transitions. [2023-03-31 21:22:39,677 INFO L78 Accepts]: Start accepts. Automaton has 2485 states and 4107 transitions. Word has length 172 [2023-03-31 21:22:39,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:39,677 INFO L495 AbstractCegarLoop]: Abstraction has 2485 states and 4107 transitions. [2023-03-31 21:22:39,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 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 21:22:39,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2485 states and 4107 transitions. [2023-03-31 21:22:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-03-31 21:22:39,682 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:39,682 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 21:22:39,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 21:22:39,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:22:39,889 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:39,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:39,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1408889770, now seen corresponding path program 1 times [2023-03-31 21:22:39,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:39,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21300797] [2023-03-31 21:22:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:39,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:22:40,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:40,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21300797] [2023-03-31 21:22:40,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21300797] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:22:40,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595897332] [2023-03-31 21:22:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:40,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:22:40,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:22:40,478 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:22:40,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 21:22:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:40,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:22:40,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:22:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:40,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:22:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:40,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595897332] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:22:40,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2081988637] [2023-03-31 21:22:40,841 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-03-31 21:22:40,841 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:22:40,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:22:40,859 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:22:40,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:22:41,387 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-03-31 21:22:43,247 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 148 for LOIs