/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:47:38,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:47:38,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:47:38,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:47:38,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:47:38,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:47:38,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:47:38,204 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 22:47:38,241 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:47:38,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:47:38,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:47:38,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:47:38,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:47:38,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:47:38,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:47:38,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:47:38,244 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:47:38,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:47:38,248 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:47:38,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:47:38,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:47:38,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:47:38,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:47:38,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:47:38,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:47:38,249 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:47:38,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:47:38,250 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:47:38,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:47:38,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:47:38,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:47:38,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:47:38,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:47:38,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:47:38,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:47:38,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:47:38,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:47:38,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:47:38,252 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:47:38,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:47:38,252 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:47:38,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:47:38,252 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:47:38,252 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:47:38,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:47:38,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:47:38,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:47:38,513 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:47:38,514 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:47:38,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label58.c [2023-03-30 22:47:39,660 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:47:40,011 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:47:40,012 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label58.c [2023-03-30 22:47:40,029 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e5c35a54/14e3cb2d56f745a085b8e3720ba94bb5/FLAG80c5451a1 [2023-03-30 22:47:40,044 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e5c35a54/14e3cb2d56f745a085b8e3720ba94bb5 [2023-03-30 22:47:40,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:47:40,048 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:47:40,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:47:40,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:47:40,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:47:40,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:47:40" (1/1) ... [2023-03-30 22:47:40,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aec2ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:47:40, skipping insertion in model container [2023-03-30 22:47:40,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:47:40" (1/1) ... [2023-03-30 22:47:40,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:47:40,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:47:40,594 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] [2023-03-30 22:47:40,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:47:40,644 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:47:40,889 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] [2023-03-30 22:47:40,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:47:40,925 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:47:40,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:47:40 WrapperNode [2023-03-30 22:47:40,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:47:40,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:47:40,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:47:40,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:47:40,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:47:40" (1/1) ... [2023-03-30 22:47:40,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:47:40" (1/1) ... [2023-03-30 22:47:40,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:47:40" (1/1) ... [2023-03-30 22:47:40,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:47:40" (1/1) ... [2023-03-30 22:47:41,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:47:40" (1/1) ... [2023-03-30 22:47:41,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:47:40" (1/1) ... [2023-03-30 22:47:41,056 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:47:40" (1/1) ... [2023-03-30 22:47:41,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:47:40" (1/1) ... [2023-03-30 22:47:41,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:47:41,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:47:41,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:47:41,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:47:41,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:47:40" (1/1) ... [2023-03-30 22:47:41,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:47:41,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:47:41,108 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) [2023-03-30 22:47:41,128 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 [2023-03-30 22:47:41,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:47:41,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:47:41,148 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:47:41,148 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 22:47:41,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:47:41,149 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 22:47:41,149 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:47:41,149 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:47:41,149 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:47:41,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:47:41,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:47:41,149 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 22:47:41,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:47:41,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:47:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:47:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:47:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:47:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:47:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:47:41,281 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:47:41,283 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:47:42,753 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:47:42,768 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:47:42,769 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 22:47:42,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:47:42 BoogieIcfgContainer [2023-03-30 22:47:42,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:47:42,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:47:42,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:47:42,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:47:42,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:47:40" (1/3) ... [2023-03-30 22:47:42,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:47:42, skipping insertion in model container [2023-03-30 22:47:42,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:47:40" (2/3) ... [2023-03-30 22:47:42,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:47:42, skipping insertion in model container [2023-03-30 22:47:42,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:47:42" (3/3) ... [2023-03-30 22:47:42,780 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label58.c [2023-03-30 22:47:42,796 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:47:42,796 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:47:42,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:47:42,867 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=PETRI_NET, 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;@40e8927d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:47:42,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:47:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 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) [2023-03-30 22:47:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-03-30 22:47:42,895 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:47:42,896 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:47:42,897 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:47:42,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:47:42,906 INFO L85 PathProgramCache]: Analyzing trace with hash -97436430, now seen corresponding path program 1 times [2023-03-30 22:47:42,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:47:42,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259185291] [2023-03-30 22:47:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:42,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:47:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:44,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:47:44,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:44,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259185291] [2023-03-30 22:47:44,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259185291] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:47:44,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:47:44,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:47:44,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128036982] [2023-03-30 22:47:44,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:47:44,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:47:44,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:44,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:47:44,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:47:44,276 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 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 4 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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) [2023-03-30 22:47:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:47:46,502 INFO L93 Difference]: Finished difference Result 889 states and 1547 transitions. [2023-03-30 22:47:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:47:46,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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 166 [2023-03-30 22:47:46,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:47:46,516 INFO L225 Difference]: With dead ends: 889 [2023-03-30 22:47:46,517 INFO L226 Difference]: Without dead ends: 485 [2023-03-30 22:47:46,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:47:46,525 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 679 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-03-30 22:47:46,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 51 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-03-30 22:47:46,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2023-03-30 22:47:46,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 475. [2023-03-30 22:47:46,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 465 states have (on average 1.5483870967741935) internal successors, (720), 467 states have internal predecessors, (720), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 22:47:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 731 transitions. [2023-03-30 22:47:46,592 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 731 transitions. Word has length 166 [2023-03-30 22:47:46,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:47:46,592 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 731 transitions. [2023-03-30 22:47:46,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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) [2023-03-30 22:47:46,593 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 731 transitions. [2023-03-30 22:47:46,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-03-30 22:47:46,597 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:47:46,597 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:47:46,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:47:46,598 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:47:46,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:47:46,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1287381935, now seen corresponding path program 1 times [2023-03-30 22:47:46,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:47:46,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809001167] [2023-03-30 22:47:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:46,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:47:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:47,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:47,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:47:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:47:47,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:47,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809001167] [2023-03-30 22:47:47,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809001167] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:47:47,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:47:47,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:47:47,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950282160] [2023-03-30 22:47:47,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:47:47,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:47:47,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:47,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:47:47,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:47:47,268 INFO L87 Difference]: Start difference. First operand 475 states and 731 transitions. Second operand has 7 states, 6 states have (on average 28.666666666666668) internal successors, (172), 4 states have internal predecessors, (172), 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) [2023-03-30 22:47:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:47:49,132 INFO L93 Difference]: Finished difference Result 1426 states and 2228 transitions. [2023-03-30 22:47:49,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:47:49,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 28.666666666666668) internal successors, (172), 4 states have internal predecessors, (172), 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 178 [2023-03-30 22:47:49,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:47:49,139 INFO L225 Difference]: With dead ends: 1426 [2023-03-30 22:47:49,139 INFO L226 Difference]: Without dead ends: 957 [2023-03-30 22:47:49,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:47:49,142 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1647 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:47:49,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 125 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-30 22:47:49,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2023-03-30 22:47:49,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 936. [2023-03-30 22:47:49,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 915 states have (on average 1.521311475409836) internal successors, (1392), 924 states have internal predecessors, (1392), 6 states have call successors, (6), 6 states have call predecessors, (6), 14 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-03-30 22:47:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1427 transitions. [2023-03-30 22:47:49,213 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1427 transitions. Word has length 178 [2023-03-30 22:47:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:47:49,219 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1427 transitions. [2023-03-30 22:47:49,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 28.666666666666668) internal successors, (172), 4 states have internal predecessors, (172), 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) [2023-03-30 22:47:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1427 transitions. [2023-03-30 22:47:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-03-30 22:47:49,227 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:47:49,227 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:47:49,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:47:49,228 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:47:49,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:47:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2104049330, now seen corresponding path program 1 times [2023-03-30 22:47:49,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:47:49,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395515961] [2023-03-30 22:47:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:49,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:47:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:49,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:49,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:47:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:47:49,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:49,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395515961] [2023-03-30 22:47:49,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395515961] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:47:49,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:47:49,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:47:49,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652689257] [2023-03-30 22:47:49,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:47:49,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:47:49,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:49,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:47:49,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:47:49,847 INFO L87 Difference]: Start difference. First operand 936 states and 1427 transitions. Second operand has 7 states, 6 states have (on average 29.5) internal successors, (177), 4 states have internal predecessors, (177), 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) [2023-03-30 22:47:50,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:47:50,902 INFO L93 Difference]: Finished difference Result 1834 states and 2823 transitions. [2023-03-30 22:47:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:47:50,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 29.5) internal successors, (177), 4 states have internal predecessors, (177), 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 183 [2023-03-30 22:47:50,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:47:50,908 INFO L225 Difference]: With dead ends: 1834 [2023-03-30 22:47:50,909 INFO L226 Difference]: Without dead ends: 904 [2023-03-30 22:47:50,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:47:50,916 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 687 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 22:47:50,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 43 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 22:47:50,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2023-03-30 22:47:50,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 896. [2023-03-30 22:47:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 875 states have (on average 1.4674285714285715) internal successors, (1284), 884 states have internal predecessors, (1284), 6 states have call successors, (6), 6 states have call predecessors, (6), 14 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-03-30 22:47:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1319 transitions. [2023-03-30 22:47:50,966 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1319 transitions. Word has length 183 [2023-03-30 22:47:50,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:47:50,966 INFO L495 AbstractCegarLoop]: Abstraction has 896 states and 1319 transitions. [2023-03-30 22:47:50,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 29.5) internal successors, (177), 4 states have internal predecessors, (177), 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) [2023-03-30 22:47:50,966 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1319 transitions. [2023-03-30 22:47:50,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-03-30 22:47:50,970 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:47:50,970 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:47:50,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 22:47:50,970 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:47:50,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:47:50,971 INFO L85 PathProgramCache]: Analyzing trace with hash 290686138, now seen corresponding path program 1 times [2023-03-30 22:47:50,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:47:50,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389867334] [2023-03-30 22:47:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:50,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:47:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:51,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:51,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:47:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:51,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-03-30 22:47:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:47:51,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:51,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389867334] [2023-03-30 22:47:51,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389867334] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:47:51,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781521833] [2023-03-30 22:47:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:51,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:47:51,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:47:51,603 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) [2023-03-30 22:47:51,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:47:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:51,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:47:51,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:47:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-30 22:47:51,987 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:47:51,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781521833] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:47:51,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:47:51,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-30 22:47:51,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174322203] [2023-03-30 22:47:51,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:47:51,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:47:51,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:52,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:47:52,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:47:52,007 INFO L87 Difference]: Start difference. First operand 896 states and 1319 transitions. Second operand has 5 states, 5 states have (on average 35.0) internal successors, (175), 4 states have internal predecessors, (175), 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) [2023-03-30 22:47:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:47:52,911 INFO L93 Difference]: Finished difference Result 2724 states and 4167 transitions. [2023-03-30 22:47:52,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:47:52,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 4 states have internal predecessors, (175), 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 188 [2023-03-30 22:47:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:47:52,922 INFO L225 Difference]: With dead ends: 2724 [2023-03-30 22:47:52,922 INFO L226 Difference]: Without dead ends: 1834 [2023-03-30 22:47:52,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:47:52,926 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 779 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:47:52,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 104 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 22:47:52,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2023-03-30 22:47:53,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1794. [2023-03-30 22:47:53,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1747 states have (on average 1.3995420721236405) internal successors, (2445), 1774 states have internal predecessors, (2445), 10 states have call successors, (10), 10 states have call predecessors, (10), 36 states have return successors, (128), 9 states have call predecessors, (128), 9 states have call successors, (128) [2023-03-30 22:47:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 2583 transitions. [2023-03-30 22:47:53,029 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 2583 transitions. Word has length 188 [2023-03-30 22:47:53,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:47:53,029 INFO L495 AbstractCegarLoop]: Abstraction has 1794 states and 2583 transitions. [2023-03-30 22:47:53,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 4 states have internal predecessors, (175), 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) [2023-03-30 22:47:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 2583 transitions. [2023-03-30 22:47:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-03-30 22:47:53,036 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:47:53,036 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:47:53,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 22:47:53,244 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 [2023-03-30 22:47:53,244 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:47:53,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:47:53,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1896198339, now seen corresponding path program 1 times [2023-03-30 22:47:53,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:47:53,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495269474] [2023-03-30 22:47:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:53,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:47:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:54,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:54,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:47:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:54,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:47:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:47:54,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:54,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495269474] [2023-03-30 22:47:54,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495269474] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:47:54,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101543066] [2023-03-30 22:47:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:54,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:47:54,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:47:54,390 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) [2023-03-30 22:47:54,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:47:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:54,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:47:54,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:47:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 22:47:54,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:47:54,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101543066] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:47:54,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:47:54,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-30 22:47:54,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765294221] [2023-03-30 22:47:54,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:47:54,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:47:54,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:54,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:47:54,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:47:54,782 INFO L87 Difference]: Start difference. First operand 1794 states and 2583 transitions. Second operand has 5 states, 5 states have (on average 35.4) internal successors, (177), 4 states have internal predecessors, (177), 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) [2023-03-30 22:47:55,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:47:55,162 INFO L93 Difference]: Finished difference Result 5429 states and 8079 transitions. [2023-03-30 22:47:55,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:47:55,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 4 states have internal predecessors, (177), 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 189 [2023-03-30 22:47:55,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:47:55,181 INFO L225 Difference]: With dead ends: 5429 [2023-03-30 22:47:55,181 INFO L226 Difference]: Without dead ends: 3641 [2023-03-30 22:47:55,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:47:55,187 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 976 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:47:55,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 820 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:47:55,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3641 states. [2023-03-30 22:47:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3641 to 3605. [2023-03-30 22:47:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3491 states have (on average 1.3981667144084788) internal successors, (4881), 3569 states have internal predecessors, (4881), 18 states have call successors, (18), 18 states have call predecessors, (18), 95 states have return successors, (371), 17 states have call predecessors, (371), 17 states have call successors, (371) [2023-03-30 22:47:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 5270 transitions. [2023-03-30 22:47:55,312 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 5270 transitions. Word has length 189 [2023-03-30 22:47:55,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:47:55,312 INFO L495 AbstractCegarLoop]: Abstraction has 3605 states and 5270 transitions. [2023-03-30 22:47:55,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 4 states have internal predecessors, (177), 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) [2023-03-30 22:47:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 5270 transitions. [2023-03-30 22:47:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-03-30 22:47:55,320 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:47:55,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:47:55,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:47:55,526 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 [2023-03-30 22:47:55,527 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:47:55,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:47:55,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1376421921, now seen corresponding path program 1 times [2023-03-30 22:47:55,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:47:55,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583381380] [2023-03-30 22:47:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:55,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:47:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:56,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:56,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:47:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:56,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:47:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:47:56,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:56,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583381380] [2023-03-30 22:47:56,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583381380] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:47:56,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108887771] [2023-03-30 22:47:56,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:56,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:47:56,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:47:56,573 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) [2023-03-30 22:47:56,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:47:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:56,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:47:56,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:47:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:47:56,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:47:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:47:56,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108887771] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:47:56,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:47:56,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 22:47:56,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174816627] [2023-03-30 22:47:56,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:47:56,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:47:56,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:56,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:47:56,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:47:56,995 INFO L87 Difference]: Start difference. First operand 3605 states and 5270 transitions. Second operand has 12 states, 12 states have (on average 17.166666666666668) internal successors, (206), 10 states have internal predecessors, (206), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 22:48:03,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:48:03,510 INFO L93 Difference]: Finished difference Result 19991 states and 34832 transitions. [2023-03-30 22:48:03,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-03-30 22:48:03,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.166666666666668) internal successors, (206), 10 states have internal predecessors, (206), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 191 [2023-03-30 22:48:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:48:03,638 INFO L225 Difference]: With dead ends: 19991 [2023-03-30 22:48:03,638 INFO L226 Difference]: Without dead ends: 16392 [2023-03-30 22:48:03,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 412 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=376, Invalid=1604, Unknown=0, NotChecked=0, Total=1980 [2023-03-30 22:48:03,662 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 3791 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 5355 mSolverCounterSat, 988 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3795 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 6343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 988 IncrementalHoareTripleChecker+Valid, 5355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:48:03,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3795 Valid, 219 Invalid, 6343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [988 Valid, 5355 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-03-30 22:48:03,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16392 states. [2023-03-30 22:48:04,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16392 to 15950. [2023-03-30 22:48:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15950 states, 15392 states have (on average 1.2801455301455302) internal successors, (19704), 15788 states have internal predecessors, (19704), 88 states have call successors, (88), 74 states have call predecessors, (88), 469 states have return successors, (3132), 87 states have call predecessors, (3132), 87 states have call successors, (3132) [2023-03-30 22:48:04,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15950 states to 15950 states and 22924 transitions. [2023-03-30 22:48:04,442 INFO L78 Accepts]: Start accepts. Automaton has 15950 states and 22924 transitions. Word has length 191 [2023-03-30 22:48:04,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:48:04,442 INFO L495 AbstractCegarLoop]: Abstraction has 15950 states and 22924 transitions. [2023-03-30 22:48:04,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.166666666666668) internal successors, (206), 10 states have internal predecessors, (206), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 22:48:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 15950 states and 22924 transitions. [2023-03-30 22:48:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-03-30 22:48:04,478 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:48:04,478 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:48:04,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:48:04,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:48:04,686 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:48:04,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:48:04,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1382602891, now seen corresponding path program 1 times [2023-03-30 22:48:04,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:48:04,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430104135] [2023-03-30 22:48:04,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:48:04,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:48:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:05,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:48:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:05,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:48:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:05,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-03-30 22:48:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:05,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-03-30 22:48:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-30 22:48:05,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:48:05,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430104135] [2023-03-30 22:48:05,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430104135] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:48:05,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284656266] [2023-03-30 22:48:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:48:05,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:48:05,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:48:05,418 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:48:05,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:48:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:05,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:48:05,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:48:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-03-30 22:48:05,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:48:05,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284656266] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:48:05,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:48:05,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-03-30 22:48:05,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308143141] [2023-03-30 22:48:05,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:48:05,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:48:05,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:48:05,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:48:05,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:48:05,758 INFO L87 Difference]: Start difference. First operand 15950 states and 22924 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 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) [2023-03-30 22:48:07,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:48:07,299 INFO L93 Difference]: Finished difference Result 42294 states and 62680 transitions. [2023-03-30 22:48:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:48:07,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 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 212 [2023-03-30 22:48:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:48:07,426 INFO L225 Difference]: With dead ends: 42294 [2023-03-30 22:48:07,427 INFO L226 Difference]: Without dead ends: 26406 [2023-03-30 22:48:07,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:48:07,472 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 655 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 22:48:07,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 94 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 22:48:07,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26406 states. [2023-03-30 22:48:08,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26406 to 26258. [2023-03-30 22:48:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26258 states, 25418 states have (on average 1.2240144779290267) internal successors, (31112), 26000 states have internal predecessors, (31112), 136 states have call successors, (136), 122 states have call predecessors, (136), 703 states have return successors, (4311), 135 states have call predecessors, (4311), 135 states have call successors, (4311) [2023-03-30 22:48:08,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26258 states to 26258 states and 35559 transitions. [2023-03-30 22:48:08,528 INFO L78 Accepts]: Start accepts. Automaton has 26258 states and 35559 transitions. Word has length 212 [2023-03-30 22:48:08,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:48:08,528 INFO L495 AbstractCegarLoop]: Abstraction has 26258 states and 35559 transitions. [2023-03-30 22:48:08,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 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) [2023-03-30 22:48:08,529 INFO L276 IsEmpty]: Start isEmpty. Operand 26258 states and 35559 transitions. [2023-03-30 22:48:08,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-03-30 22:48:08,559 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:48:08,559 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:48:08,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:48:08,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:48:08,767 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:48:08,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:48:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash 589500463, now seen corresponding path program 1 times [2023-03-30 22:48:08,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:48:08,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020075225] [2023-03-30 22:48:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:48:08,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:48:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:09,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:48:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:09,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:48:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:48:09,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:48:09,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020075225] [2023-03-30 22:48:09,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020075225] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:48:09,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:48:09,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:48:09,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808485757] [2023-03-30 22:48:09,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:48:09,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:48:09,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:48:09,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:48:09,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:48:09,881 INFO L87 Difference]: Start difference. First operand 26258 states and 35559 transitions. Second operand has 7 states, 6 states have (on average 34.166666666666664) internal successors, (205), 4 states have internal predecessors, (205), 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) [2023-03-30 22:48:12,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:48:12,074 INFO L93 Difference]: Finished difference Result 48819 states and 65914 transitions. [2023-03-30 22:48:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:48:12,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 34.166666666666664) internal successors, (205), 4 states have internal predecessors, (205), 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 211 [2023-03-30 22:48:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:48:12,190 INFO L225 Difference]: With dead ends: 48819 [2023-03-30 22:48:12,190 INFO L226 Difference]: Without dead ends: 32844 [2023-03-30 22:48:12,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:48:12,241 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1082 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:48:12,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1082 Valid, 107 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-30 22:48:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32844 states. [2023-03-30 22:48:13,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32844 to 32638. [2023-03-30 22:48:13,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32638 states, 31655 states have (on average 1.2154162059706208) internal successors, (38474), 32322 states have internal predecessors, (38474), 164 states have call successors, (164), 152 states have call predecessors, (164), 818 states have return successors, (5273), 163 states have call predecessors, (5273), 163 states have call successors, (5273) [2023-03-30 22:48:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32638 states to 32638 states and 43911 transitions. [2023-03-30 22:48:13,202 INFO L78 Accepts]: Start accepts. Automaton has 32638 states and 43911 transitions. Word has length 211 [2023-03-30 22:48:13,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:48:13,203 INFO L495 AbstractCegarLoop]: Abstraction has 32638 states and 43911 transitions. [2023-03-30 22:48:13,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 34.166666666666664) internal successors, (205), 4 states have internal predecessors, (205), 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) [2023-03-30 22:48:13,203 INFO L276 IsEmpty]: Start isEmpty. Operand 32638 states and 43911 transitions. [2023-03-30 22:48:13,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-03-30 22:48:13,369 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:48:13,369 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, 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] [2023-03-30 22:48:13,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-30 22:48:13,369 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:48:13,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:48:13,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1731155431, now seen corresponding path program 1 times [2023-03-30 22:48:13,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:48:13,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041303492] [2023-03-30 22:48:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:48:13,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:48:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:14,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:48:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:14,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:48:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:14,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:48:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:48:14,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:48:14,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041303492] [2023-03-30 22:48:14,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041303492] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:48:14,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614411399] [2023-03-30 22:48:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:48:14,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:48:14,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:48:14,365 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:48:14,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:48:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:14,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:48:14,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:48:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-30 22:48:14,770 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:48:14,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614411399] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:48:14,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:48:14,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-03-30 22:48:14,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355795417] [2023-03-30 22:48:14,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:48:14,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:48:14,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:48:14,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:48:14,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:48:14,772 INFO L87 Difference]: Start difference. First operand 32638 states and 43911 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2023-03-30 22:48:15,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:48:15,792 INFO L93 Difference]: Finished difference Result 63068 states and 85320 transitions. [2023-03-30 22:48:15,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:48:15,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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 222 [2023-03-30 22:48:15,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:48:15,891 INFO L225 Difference]: With dead ends: 63068 [2023-03-30 22:48:15,891 INFO L226 Difference]: Without dead ends: 30852 [2023-03-30 22:48:15,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:48:15,948 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 100 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:48:15,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 356 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 22:48:15,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30852 states. [2023-03-30 22:48:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30852 to 30810. [2023-03-30 22:48:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30810 states, 29902 states have (on average 1.1668115845093974) internal successors, (34890), 30512 states have internal predecessors, (34890), 154 states have call successors, (154), 144 states have call predecessors, (154), 753 states have return successors, (4137), 153 states have call predecessors, (4137), 153 states have call successors, (4137) [2023-03-30 22:48:16,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30810 states to 30810 states and 39181 transitions. [2023-03-30 22:48:16,812 INFO L78 Accepts]: Start accepts. Automaton has 30810 states and 39181 transitions. Word has length 222 [2023-03-30 22:48:16,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:48:16,813 INFO L495 AbstractCegarLoop]: Abstraction has 30810 states and 39181 transitions. [2023-03-30 22:48:16,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2023-03-30 22:48:16,813 INFO L276 IsEmpty]: Start isEmpty. Operand 30810 states and 39181 transitions. [2023-03-30 22:48:16,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-03-30 22:48:16,854 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:48:16,854 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, 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] [2023-03-30 22:48:16,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:48:17,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:48:17,060 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:48:17,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:48:17,061 INFO L85 PathProgramCache]: Analyzing trace with hash 76697072, now seen corresponding path program 1 times [2023-03-30 22:48:17,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:48:17,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112126165] [2023-03-30 22:48:17,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:48:17,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:48:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:17,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:48:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:17,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:48:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:17,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-03-30 22:48:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:48:17,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:48:17,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112126165] [2023-03-30 22:48:17,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112126165] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:48:17,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947033170] [2023-03-30 22:48:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:48:17,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:48:17,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:48:17,505 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:48:17,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:48:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:48:17,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:48:17,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:48:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:48:17,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:48:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:48:17,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947033170] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:48:17,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:48:17,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 22:48:17,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837641842] [2023-03-30 22:48:17,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:48:17,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:48:17,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:48:17,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:48:17,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:48:17,878 INFO L87 Difference]: Start difference. First operand 30810 states and 39181 transitions. Second operand has 12 states, 12 states have (on average 21.25) internal successors, (255), 10 states have internal predecessors, (255), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 22:48:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:48:26,090 INFO L93 Difference]: Finished difference Result 105520 states and 165025 transitions. [2023-03-30 22:48:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-03-30 22:48:26,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.25) internal successors, (255), 10 states have internal predecessors, (255), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 244 [2023-03-30 22:48:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:48:26,509 INFO L225 Difference]: With dead ends: 105520 [2023-03-30 22:48:26,510 INFO L226 Difference]: Without dead ends: 74923 [2023-03-30 22:48:26,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=383, Invalid=1873, Unknown=0, NotChecked=0, Total=2256 [2023-03-30 22:48:26,598 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 2349 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 6691 mSolverCounterSat, 1047 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2360 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 7738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1047 IncrementalHoareTripleChecker+Valid, 6691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:48:26,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2360 Valid, 384 Invalid, 7738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1047 Valid, 6691 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-03-30 22:48:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74923 states.