/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_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:22:13,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:22:13,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:22:13,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-31 21:22:13,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:22:13,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:22:13,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:22:13,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:22:13,493 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:22:13,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:22:13,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:22:13,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:22:13,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:22:13,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:22:13,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:22:13,497 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 21:22:13,532 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:22:13,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:22:13,533 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:22:13,533 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:22:13,534 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:22:13,534 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:22:13,534 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:22:13,534 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:22:13,535 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:22:13,535 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:22:13,535 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:22:13,536 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:22:13,536 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:22:13,536 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:22:13,536 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:22:13,536 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:22:13,536 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:22:13,536 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:22:13,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:22:13,537 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:22:13,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:22:13,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:22:13,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:22:13,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:22:13,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:22:13,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:22:13,538 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:22:13,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:22:13,539 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:22:13,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:22:13,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:22:13,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:22:13,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:22:13,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:22:13,540 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:22:13,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:22:13,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:22:13,540 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:22:13,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:22:13,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:22:13,540 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:22:13,540 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:22:13,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:22:13,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:22:13,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:22:13,816 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:22:13,817 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:22:13,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label55.c [2023-03-31 21:22:14,985 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:22:15,292 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:22:15,293 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label55.c [2023-03-31 21:22:15,311 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70181dd71/f8de3d9450854d68aae1b78a745a9466/FLAGdf72c429e [2023-03-31 21:22:15,327 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70181dd71/f8de3d9450854d68aae1b78a745a9466 [2023-03-31 21:22:15,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:22:15,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:22:15,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:22:15,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:22:15,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:22:15,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:22:15" (1/1) ... [2023-03-31 21:22:15,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f1455ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:15, skipping insertion in model container [2023-03-31 21:22:15,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:22:15" (1/1) ... [2023-03-31 21:22:15,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:22:15,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:22:15,903 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_label55.c[56086,56099] [2023-03-31 21:22:15,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:22:15,981 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:22:16,203 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_label55.c[56086,56099] [2023-03-31 21:22:16,218 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:22:16,235 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:22:16,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:16 WrapperNode [2023-03-31 21:22:16,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:22:16,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:22:16,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:22:16,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:22:16,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:16" (1/1) ... [2023-03-31 21:22:16,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:16" (1/1) ... [2023-03-31 21:22:16,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:16" (1/1) ... [2023-03-31 21:22:16,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:16" (1/1) ... [2023-03-31 21:22:16,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:16" (1/1) ... [2023-03-31 21:22:16,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:16" (1/1) ... [2023-03-31 21:22:16,384 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:16" (1/1) ... [2023-03-31 21:22:16,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:16" (1/1) ... [2023-03-31 21:22:16,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:22:16,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:22:16,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:22:16,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:22:16,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:16" (1/1) ... [2023-03-31 21:22:16,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:22:16,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:22:16,442 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 21:22:16,473 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 21:22:16,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:22:16,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:22:16,488 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:22:16,488 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:22:16,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:22:16,488 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:22:16,488 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:22:16,488 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:22:16,488 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:22:16,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:22:16,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:22:16,489 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:22:16,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:22:16,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:22:16,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:22:16,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:22:16,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:22:16,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:22:16,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:22:16,595 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:22:16,598 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:22:18,142 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:22:18,503 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:22:18,503 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:22:18,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:22:18 BoogieIcfgContainer [2023-03-31 21:22:18,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:22:18,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:22:18,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:22:18,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:22:18,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:22:15" (1/3) ... [2023-03-31 21:22:18,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3471e9fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:22:18, skipping insertion in model container [2023-03-31 21:22:18,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:16" (2/3) ... [2023-03-31 21:22:18,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3471e9fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:22:18, skipping insertion in model container [2023-03-31 21:22:18,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:22:18" (3/3) ... [2023-03-31 21:22:18,514 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label55.c [2023-03-31 21:22:18,531 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:22:18,531 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:22:18,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:22:18,594 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;@4b762d8e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:22:18,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:22:18,601 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 21:22:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-03-31 21:22:18,612 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:18,613 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 21:22:18,613 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:18,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:18,618 INFO L85 PathProgramCache]: Analyzing trace with hash 597529393, now seen corresponding path program 1 times [2023-03-31 21:22:18,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:18,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924608427] [2023-03-31 21:22:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:18,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:19,882 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 21:22:19,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:19,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924608427] [2023-03-31 21:22:19,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924608427] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:19,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:22:19,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:22:19,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904567681] [2023-03-31 21:22:19,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:19,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:22:19,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:19,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:22:19,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:22:19,938 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 21:22:20,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:20,802 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-03-31 21:22:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:22:20,805 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 21:22:20,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:20,817 INFO L225 Difference]: With dead ends: 462 [2023-03-31 21:22:20,817 INFO L226 Difference]: Without dead ends: 301 [2023-03-31 21:22:20,821 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 21:22:20,824 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 33 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:20,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 56 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 21:22:20,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-03-31 21:22:20,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-03-31 21:22:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.8532423208191127) internal successors, (543), 293 states have internal predecessors, (543), 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 21:22:20,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 552 transitions. [2023-03-31 21:22:20,879 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 552 transitions. Word has length 149 [2023-03-31 21:22:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:20,880 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 552 transitions. [2023-03-31 21:22:20,880 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 21:22:20,880 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 552 transitions. [2023-03-31 21:22:20,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-03-31 21:22:20,884 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:20,884 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] [2023-03-31 21:22:20,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:22:20,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:20,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:20,886 INFO L85 PathProgramCache]: Analyzing trace with hash 449083691, now seen corresponding path program 1 times [2023-03-31 21:22:20,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:20,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744151686] [2023-03-31 21:22:20,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:20,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:21,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:21,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744151686] [2023-03-31 21:22:21,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744151686] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:21,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:22:21,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:22:21,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115711686] [2023-03-31 21:22:21,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:21,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:22:21,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:21,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:22:21,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:22:21,438 INFO L87 Difference]: Start difference. First operand 301 states and 552 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) [2023-03-31 21:22:22,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:22,277 INFO L93 Difference]: Finished difference Result 921 states and 1703 transitions. [2023-03-31 21:22:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:22:22,279 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 [2023-03-31 21:22:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:22,287 INFO L225 Difference]: With dead ends: 921 [2023-03-31 21:22:22,287 INFO L226 Difference]: Without dead ends: 625 [2023-03-31 21:22:22,289 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 21:22:22,290 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 536 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:22,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 44 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 21:22:22,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-03-31 21:22:22,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 605. [2023-03-31 21:22:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 588 states have (on average 1.7023809523809523) internal successors, (1001), 593 states have internal predecessors, (1001), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-03-31 21:22:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1029 transitions. [2023-03-31 21:22:22,334 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1029 transitions. Word has length 157 [2023-03-31 21:22:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:22,335 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1029 transitions. [2023-03-31 21:22:22,335 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) [2023-03-31 21:22:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1029 transitions. [2023-03-31 21:22:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-03-31 21:22:22,339 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:22,339 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] [2023-03-31 21:22:22,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:22:22,339 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:22,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:22,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1089861356, now seen corresponding path program 1 times [2023-03-31 21:22:22,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:22,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086362617] [2023-03-31 21:22:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:22,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:23,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:23,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086362617] [2023-03-31 21:22:23,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086362617] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:23,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:22:23,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:22:23,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526630504] [2023-03-31 21:22:23,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:23,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:22:23,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:23,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:22:23,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:22:23,254 INFO L87 Difference]: Start difference. First operand 605 states and 1029 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) [2023-03-31 21:22:24,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:24,250 INFO L93 Difference]: Finished difference Result 1853 states and 3247 transitions. [2023-03-31 21:22:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:22:24,251 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 [2023-03-31 21:22:24,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:24,260 INFO L225 Difference]: With dead ends: 1853 [2023-03-31 21:22:24,260 INFO L226 Difference]: Without dead ends: 1253 [2023-03-31 21:22:24,265 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 [2023-03-31 21:22:24,266 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 453 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:24,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 55 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-31 21:22:24,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2023-03-31 21:22:24,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1231. [2023-03-31 21:22:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1187 states have (on average 1.620050547598989) internal successors, (1923), 1211 states have internal predecessors, (1923), 10 states have call successors, (10), 10 states have call predecessors, (10), 33 states have return successors, (93), 9 states have call predecessors, (93), 9 states have call successors, (93) [2023-03-31 21:22:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2026 transitions. [2023-03-31 21:22:24,319 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2026 transitions. Word has length 163 [2023-03-31 21:22:24,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:24,320 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 2026 transitions. [2023-03-31 21:22:24,320 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) [2023-03-31 21:22:24,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2026 transitions. [2023-03-31 21:22:24,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-03-31 21:22:24,325 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:24,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:22:24,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:22:24,326 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:24,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:24,326 INFO L85 PathProgramCache]: Analyzing trace with hash -614924293, now seen corresponding path program 1 times [2023-03-31 21:22:24,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:24,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370576526] [2023-03-31 21:22:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:24,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:24,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:24,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370576526] [2023-03-31 21:22:24,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370576526] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:24,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:22:24,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:22:24,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8997837] [2023-03-31 21:22:24,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:24,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:22:24,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:22:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:22:24,773 INFO L87 Difference]: Start difference. First operand 1231 states and 2026 transitions. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 21:22:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:25,668 INFO L93 Difference]: Finished difference Result 3801 states and 6623 transitions. [2023-03-31 21:22:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:22:25,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 171 [2023-03-31 21:22:25,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:25,687 INFO L225 Difference]: With dead ends: 3801 [2023-03-31 21:22:25,688 INFO L226 Difference]: Without dead ends: 2575 [2023-03-31 21:22:25,691 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 21:22:25,698 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 531 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:25,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 44 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 21:22:25,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2023-03-31 21:22:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 2495. [2023-03-31 21:22:25,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2391 states have (on average 1.5311585110832289) internal successors, (3661), 2459 states have internal predecessors, (3661), 18 states have call successors, (18), 18 states have call predecessors, (18), 85 states have return successors, (309), 17 states have call predecessors, (309), 17 states have call successors, (309) [2023-03-31 21:22:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 3988 transitions. [2023-03-31 21:22:25,805 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 3988 transitions. Word has length 171 [2023-03-31 21:22:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:25,806 INFO L495 AbstractCegarLoop]: Abstraction has 2495 states and 3988 transitions. [2023-03-31 21:22:25,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 21:22:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 3988 transitions. [2023-03-31 21:22:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-03-31 21:22:25,811 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:25,812 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:22:25,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:22:25,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:25,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:25,812 INFO L85 PathProgramCache]: Analyzing trace with hash 478154063, now seen corresponding path program 1 times [2023-03-31 21:22:25,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:25,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835613319] [2023-03-31 21:22:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:25,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:26,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:26,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835613319] [2023-03-31 21:22:26,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835613319] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:26,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:22:26,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:22:26,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230301012] [2023-03-31 21:22:26,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:26,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:22:26,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:26,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:22:26,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:22:26,706 INFO L87 Difference]: Start difference. First operand 2495 states and 3988 transitions. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 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 21:22:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:27,567 INFO L93 Difference]: Finished difference Result 6345 states and 10447 transitions. [2023-03-31 21:22:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:22:27,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 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 172 [2023-03-31 21:22:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:27,591 INFO L225 Difference]: With dead ends: 6345 [2023-03-31 21:22:27,592 INFO L226 Difference]: Without dead ends: 3855 [2023-03-31 21:22:27,602 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 21:22:27,605 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 425 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:27,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 47 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 21:22:27,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2023-03-31 21:22:27,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 3795. [2023-03-31 21:22:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3613 states have (on average 1.4707998892886798) internal successors, (5314), 3743 states have internal predecessors, (5314), 26 states have call successors, (26), 26 states have call predecessors, (26), 155 states have return successors, (677), 25 states have call predecessors, (677), 25 states have call successors, (677) [2023-03-31 21:22:27,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 6017 transitions. [2023-03-31 21:22:27,758 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 6017 transitions. Word has length 172 [2023-03-31 21:22:27,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:27,759 INFO L495 AbstractCegarLoop]: Abstraction has 3795 states and 6017 transitions. [2023-03-31 21:22:27,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 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 21:22:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 6017 transitions. [2023-03-31 21:22:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-03-31 21:22:27,767 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:27,767 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 21:22:27,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 21:22:27,767 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:27,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:27,768 INFO L85 PathProgramCache]: Analyzing trace with hash -2001078334, now seen corresponding path program 1 times [2023-03-31 21:22:27,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:27,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948708888] [2023-03-31 21:22:27,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:27,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:27,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:28,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:28,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948708888] [2023-03-31 21:22:28,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948708888] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:22:28,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259686651] [2023-03-31 21:22:28,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:28,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:22:28,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:22:28,513 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 21:22:28,535 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 21:22:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:28,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:22:28,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:22:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 21:22:29,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:22:29,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259686651] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:29,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:22:29,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-03-31 21:22:29,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796741214] [2023-03-31 21:22:29,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:29,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:22:29,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:29,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:22:29,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:22:29,080 INFO L87 Difference]: Start difference. First operand 3795 states and 6017 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:22:29,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:29,796 INFO L93 Difference]: Finished difference Result 10609 states and 17394 transitions. [2023-03-31 21:22:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:22:29,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 174 [2023-03-31 21:22:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:29,838 INFO L225 Difference]: With dead ends: 10609 [2023-03-31 21:22:29,838 INFO L226 Difference]: Without dead ends: 6819 [2023-03-31 21:22:29,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:22:29,851 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:29,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 282 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 21:22:29,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6819 states. [2023-03-31 21:22:30,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6819 to 6807. [2023-03-31 21:22:30,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6807 states, 6549 states have (on average 1.3053901358986104) internal successors, (8549), 6715 states have internal predecessors, (8549), 46 states have call successors, (46), 46 states have call predecessors, (46), 211 states have return successors, (1167), 45 states have call predecessors, (1167), 45 states have call successors, (1167) [2023-03-31 21:22:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 9762 transitions. [2023-03-31 21:22:30,073 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 9762 transitions. Word has length 174 [2023-03-31 21:22:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:30,074 INFO L495 AbstractCegarLoop]: Abstraction has 6807 states and 9762 transitions. [2023-03-31 21:22:30,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:22:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 9762 transitions. [2023-03-31 21:22:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-03-31 21:22:30,091 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:30,092 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:22:30,101 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 21:22:30,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-31 21:22:30,301 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:30,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:30,302 INFO L85 PathProgramCache]: Analyzing trace with hash 59427029, now seen corresponding path program 1 times [2023-03-31 21:22:30,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:30,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120308562] [2023-03-31 21:22:30,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:30,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:31,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:31,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120308562] [2023-03-31 21:22:31,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120308562] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:31,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:22:31,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:22:31,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184730321] [2023-03-31 21:22:31,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:31,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:22:31,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:22:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:22:31,173 INFO L87 Difference]: Start difference. First operand 6807 states and 9762 transitions. Second operand has 5 states, 5 states have (on average 36.2) internal successors, (181), 4 states have internal predecessors, (181), 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 21:22:32,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:32,135 INFO L93 Difference]: Finished difference Result 14325 states and 20557 transitions. [2023-03-31 21:22:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:22:32,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.2) internal successors, (181), 4 states have internal predecessors, (181), 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 187 [2023-03-31 21:22:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:32,179 INFO L225 Difference]: With dead ends: 14325 [2023-03-31 21:22:32,180 INFO L226 Difference]: Without dead ends: 8123 [2023-03-31 21:22:32,195 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 [2023-03-31 21:22:32,196 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 442 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:32,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 55 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 21:22:32,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8123 states. [2023-03-31 21:22:32,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8123 to 8041. [2023-03-31 21:22:32,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8041 states, 7738 states have (on average 1.290385112432153) internal successors, (9985), 7933 states have internal predecessors, (9985), 54 states have call successors, (54), 54 states have call predecessors, (54), 248 states have return successors, (1377), 53 states have call predecessors, (1377), 53 states have call successors, (1377) [2023-03-31 21:22:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8041 states to 8041 states and 11416 transitions. [2023-03-31 21:22:32,472 INFO L78 Accepts]: Start accepts. Automaton has 8041 states and 11416 transitions. Word has length 187 [2023-03-31 21:22:32,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:32,472 INFO L495 AbstractCegarLoop]: Abstraction has 8041 states and 11416 transitions. [2023-03-31 21:22:32,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.2) internal successors, (181), 4 states have internal predecessors, (181), 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 21:22:32,473 INFO L276 IsEmpty]: Start isEmpty. Operand 8041 states and 11416 transitions. [2023-03-31 21:22:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-03-31 21:22:32,555 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:32,555 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-31 21:22:32,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 21:22:32,556 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:32,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:32,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1079040085, now seen corresponding path program 1 times [2023-03-31 21:22:32,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:32,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477207784] [2023-03-31 21:22:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:32,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:33,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:33,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477207784] [2023-03-31 21:22:33,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477207784] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:22:33,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286523503] [2023-03-31 21:22:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:33,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:22:33,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:22:33,517 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 21:22:33,592 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 21:22:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:33,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:22:33,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:22:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 21:22:34,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:22:34,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286523503] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:34,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:22:34,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-03-31 21:22:34,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543491697] [2023-03-31 21:22:34,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:34,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:22:34,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:34,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:22:34,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:22:34,012 INFO L87 Difference]: Start difference. First operand 8041 states and 11416 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:22:34,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:34,685 INFO L93 Difference]: Finished difference Result 19248 states and 28081 transitions. [2023-03-31 21:22:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:22:34,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 198 [2023-03-31 21:22:34,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:34,749 INFO L225 Difference]: With dead ends: 19248 [2023-03-31 21:22:34,749 INFO L226 Difference]: Without dead ends: 12404 [2023-03-31 21:22:34,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:22:34,771 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 15 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:34,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 92 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 21:22:34,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12404 states. [2023-03-31 21:22:35,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12404 to 11945. [2023-03-31 21:22:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11945 states, 11549 states have (on average 1.3089444973590787) internal successors, (15117), 11785 states have internal predecessors, (15117), 80 states have call successors, (80), 80 states have call predecessors, (80), 315 states have return successors, (2312), 79 states have call predecessors, (2312), 79 states have call successors, (2312) [2023-03-31 21:22:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11945 states to 11945 states and 17509 transitions. [2023-03-31 21:22:35,161 INFO L78 Accepts]: Start accepts. Automaton has 11945 states and 17509 transitions. Word has length 198 [2023-03-31 21:22:35,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:35,162 INFO L495 AbstractCegarLoop]: Abstraction has 11945 states and 17509 transitions. [2023-03-31 21:22:35,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:22:35,163 INFO L276 IsEmpty]: Start isEmpty. Operand 11945 states and 17509 transitions. [2023-03-31 21:22:35,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-03-31 21:22:35,186 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:35,187 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:22:35,194 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 21:22:35,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-03-31 21:22:35,394 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:35,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1251447370, now seen corresponding path program 1 times [2023-03-31 21:22:35,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:35,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174859705] [2023-03-31 21:22:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:35,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:22:36,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:36,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174859705] [2023-03-31 21:22:36,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174859705] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:22:36,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127670307] [2023-03-31 21:22:36,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:36,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:22:36,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:22:36,225 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 21:22:36,252 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 21:22:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:36,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:22:36,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:22:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:36,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:22:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:36,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127670307] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:22:36,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [969634839] [2023-03-31 21:22:36,585 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-03-31 21:22:36,586 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:22:36,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:22:36,593 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:22:36,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:22:37,244 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-03-31 21:22:40,840 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 155 for LOIs [2023-03-31 21:22:49,569 WARN L223 SmtUtils]: Spent 5.91s on a formula simplification that was a NOOP. DAG size: 407 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)