/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_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:28:53,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:28:53,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:28:53,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 20:28:53,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:28:53,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:28:53,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:28:53,924 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 [2023-04-01 20:28:53,949 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:28:53,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:28:53,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:28:53,949 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:28:53,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:28:53,950 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:28:53,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:28:53,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:28:53,950 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:28:53,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:28:53,950 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:28:53,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:28:53,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:28:53,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:28:53,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:28:53,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:28:53,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:28:53,951 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:28:53,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:28:53,951 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:28:53,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:28:53,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:28:53,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:28:53,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:28:53,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:28:53,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:28:53,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:28:53,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:28:53,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:28:53,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:28:53,952 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:28:53,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:28:53,952 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:28:53,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:28:53,952 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:28:53,953 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:28:54,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:28:54,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:28:54,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:28:54,138 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:28:54,138 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:28:54,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label33.c [2023-04-01 20:28:55,172 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:28:55,448 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:28:55,449 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label33.c [2023-04-01 20:28:55,472 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edc6e954b/99dbee008402402882aea4f2f43e3900/FLAG6cdd19ea4 [2023-04-01 20:28:55,487 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edc6e954b/99dbee008402402882aea4f2f43e3900 [2023-04-01 20:28:55,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:28:55,490 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:28:55,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:28:55,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:28:55,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:28:55,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:28:55" (1/1) ... [2023-04-01 20:28:55,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@726105cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:28:55, skipping insertion in model container [2023-04-01 20:28:55,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:28:55" (1/1) ... [2023-04-01 20:28:55,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:28:55,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:28:55,945 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_label33.c[55678,55691] [2023-04-01 20:28:55,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:28:55,986 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:28:56,105 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_label33.c[55678,55691] [2023-04-01 20:28:56,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:28:56,134 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:28:56,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:28:56 WrapperNode [2023-04-01 20:28:56,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:28:56,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:28:56,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:28:56,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:28:56,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:28:56" (1/1) ... [2023-04-01 20:28:56,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:28:56" (1/1) ... [2023-04-01 20:28:56,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:28:56" (1/1) ... [2023-04-01 20:28:56,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:28:56" (1/1) ... [2023-04-01 20:28:56,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:28:56" (1/1) ... [2023-04-01 20:28:56,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:28:56" (1/1) ... [2023-04-01 20:28:56,267 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:28:56" (1/1) ... [2023-04-01 20:28:56,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:28:56" (1/1) ... [2023-04-01 20:28:56,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:28:56,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:28:56,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:28:56,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:28:56,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:28:56" (1/1) ... [2023-04-01 20:28:56,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:28:56,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:28:56,346 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 20:28:56,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 20:28:56,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:28:56,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:28:56,375 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:28:56,375 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 20:28:56,375 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:28:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 20:28:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:28:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:28:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:28:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:28:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:28:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 20:28:56,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:28:56,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:28:56,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:28:56,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:28:56,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:28:56,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:28:56,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:28:56,459 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:28:56,461 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:28:57,750 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:28:57,762 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:28:57,762 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 20:28:57,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:28:57 BoogieIcfgContainer [2023-04-01 20:28:57,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:28:57,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:28:57,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:28:57,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:28:57,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:28:55" (1/3) ... [2023-04-01 20:28:57,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9ed3fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:28:57, skipping insertion in model container [2023-04-01 20:28:57,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:28:56" (2/3) ... [2023-04-01 20:28:57,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9ed3fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:28:57, skipping insertion in model container [2023-04-01 20:28:57,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:28:57" (3/3) ... [2023-04-01 20:28:57,773 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label33.c [2023-04-01 20:28:57,785 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:28:57,785 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:28:57,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:28:57,846 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;@1a227b54, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:28:57,846 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:28:57,854 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) [2023-04-01 20:28:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-01 20:28:57,870 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:28:57,871 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] [2023-04-01 20:28:57,871 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:28:57,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:28:57,876 INFO L85 PathProgramCache]: Analyzing trace with hash 135404065, now seen corresponding path program 1 times [2023-04-01 20:28:57,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:28:57,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377658083] [2023-04-01 20:28:57,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:57,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:28:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:58,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:28:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:28:58,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:28:58,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377658083] [2023-04-01 20:28:58,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377658083] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:28:58,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:28:58,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 20:28:58,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750938856] [2023-04-01 20:28:58,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:28:58,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:28:58,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:28:58,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:28:58,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:28:58,858 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 5 states, 4 states have (on average 40.25) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 20:29:01,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:29:01,287 INFO L93 Difference]: Finished difference Result 1107 states and 1968 transitions. [2023-04-01 20:29:01,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 20:29:01,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 40.25) internal successors, (161), 3 states have internal predecessors, (161), 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 165 [2023-04-01 20:29:01,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:29:01,312 INFO L225 Difference]: With dead ends: 1107 [2023-04-01 20:29:01,312 INFO L226 Difference]: Without dead ends: 699 [2023-04-01 20:29:01,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:29:01,322 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1026 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:29:01,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 70 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 20:29:01,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2023-04-01 20:29:01,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 474. [2023-04-01 20:29:01,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 464 states have (on average 1.5280172413793103) internal successors, (709), 466 states have internal predecessors, (709), 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) [2023-04-01 20:29:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 720 transitions. [2023-04-01 20:29:01,400 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 720 transitions. Word has length 165 [2023-04-01 20:29:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:29:01,403 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 720 transitions. [2023-04-01 20:29:01,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 40.25) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 20:29:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 720 transitions. [2023-04-01 20:29:01,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-04-01 20:29:01,414 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:29:01,414 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] [2023-04-01 20:29:01,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:29:01,415 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:29:01,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:29:01,416 INFO L85 PathProgramCache]: Analyzing trace with hash -41528606, now seen corresponding path program 1 times [2023-04-01 20:29:01,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:29:01,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136455032] [2023-04-01 20:29:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:01,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:29:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:01,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:29:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:01,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:29:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:29:01,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:29:01,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136455032] [2023-04-01 20:29:01,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136455032] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:29:01,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:29:01,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:29:01,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469216013] [2023-04-01 20:29:01,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:29:01,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:29:01,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:29:01,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:29:01,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:29:01,909 INFO L87 Difference]: Start difference. First operand 474 states and 720 transitions. Second operand has 7 states, 6 states have (on average 28.5) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:29:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:29:03,431 INFO L93 Difference]: Finished difference Result 1422 states and 2199 transitions. [2023-04-01 20:29:03,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:29:03,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 28.5) internal successors, (171), 4 states have internal predecessors, (171), 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 177 [2023-04-01 20:29:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:29:03,436 INFO L225 Difference]: With dead ends: 1422 [2023-04-01 20:29:03,436 INFO L226 Difference]: Without dead ends: 954 [2023-04-01 20:29:03,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:29:03,438 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1220 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:29:03,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 142 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 20:29:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2023-04-01 20:29:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 934. [2023-04-01 20:29:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 914 states have (on average 1.5) internal successors, (1371), 922 states have internal predecessors, (1371), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-04-01 20:29:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1406 transitions. [2023-04-01 20:29:03,465 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1406 transitions. Word has length 177 [2023-04-01 20:29:03,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:29:03,471 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1406 transitions. [2023-04-01 20:29:03,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 28.5) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:29:03,471 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1406 transitions. [2023-04-01 20:29:03,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-04-01 20:29:03,473 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:29:03,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:29:03,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:29:03,474 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:29:03,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:29:03,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2055916135, now seen corresponding path program 1 times [2023-04-01 20:29:03,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:29:03,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106999737] [2023-04-01 20:29:03,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:03,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:29:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:03,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:29:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:04,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:29:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:29:04,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:29:04,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106999737] [2023-04-01 20:29:04,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106999737] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:29:04,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:29:04,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 20:29:04,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827021240] [2023-04-01 20:29:04,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:29:04,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:29:04,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:29:04,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:29:04,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:29:04,048 INFO L87 Difference]: Start difference. First operand 934 states and 1406 transitions. Second operand has 8 states, 7 states have (on average 26.571428571428573) internal successors, (186), 5 states have internal predecessors, (186), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:29:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:29:06,398 INFO L93 Difference]: Finished difference Result 3650 states and 5761 transitions. [2023-04-01 20:29:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 20:29:06,399 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 26.571428571428573) internal successors, (186), 5 states have internal predecessors, (186), 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 192 [2023-04-01 20:29:06,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:29:06,413 INFO L225 Difference]: With dead ends: 3650 [2023-04-01 20:29:06,413 INFO L226 Difference]: Without dead ends: 2722 [2023-04-01 20:29:06,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:29:06,422 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1091 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:29:06,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 170 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2357 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 20:29:06,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2023-04-01 20:29:06,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 2686. [2023-04-01 20:29:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 2615 states have (on average 1.401529636711281) internal successors, (3665), 2658 states have internal predecessors, (3665), 14 states have call successors, (14), 14 states have call predecessors, (14), 56 states have return successors, (220), 13 states have call predecessors, (220), 13 states have call successors, (220) [2023-04-01 20:29:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 3899 transitions. [2023-04-01 20:29:06,509 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 3899 transitions. Word has length 192 [2023-04-01 20:29:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:29:06,510 INFO L495 AbstractCegarLoop]: Abstraction has 2686 states and 3899 transitions. [2023-04-01 20:29:06,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 26.571428571428573) internal successors, (186), 5 states have internal predecessors, (186), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:29:06,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 3899 transitions. [2023-04-01 20:29:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-04-01 20:29:06,516 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:29:06,516 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:29:06,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 20:29:06,516 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:29:06,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:29:06,517 INFO L85 PathProgramCache]: Analyzing trace with hash 771427017, now seen corresponding path program 1 times [2023-04-01 20:29:06,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:29:06,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509123438] [2023-04-01 20:29:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:06,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:29:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:07,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:29:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:07,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:29:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:07,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:29:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 20:29:07,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:29:07,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509123438] [2023-04-01 20:29:07,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509123438] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:29:07,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182299867] [2023-04-01 20:29:07,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:07,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:29:07,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:29:07,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:29:07,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 20:29:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:07,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:29:07,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:29:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 20:29:07,522 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:29:07,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182299867] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:29:07,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:29:07,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:29:07,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934416801] [2023-04-01 20:29:07,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:29:07,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:29:07,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:29:07,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:29:07,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:29:07,524 INFO L87 Difference]: Start difference. First operand 2686 states and 3899 transitions. Second operand has 5 states, 5 states have (on average 36.6) internal successors, (183), 4 states have internal predecessors, (183), 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) [2023-04-01 20:29:07,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:29:07,876 INFO L93 Difference]: Finished difference Result 8131 states and 12232 transitions. [2023-04-01 20:29:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:29:07,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 4 states have internal predecessors, (183), 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 195 [2023-04-01 20:29:07,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:29:07,902 INFO L225 Difference]: With dead ends: 8131 [2023-04-01 20:29:07,902 INFO L226 Difference]: Without dead ends: 5451 [2023-04-01 20:29:07,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:29:07,914 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 1080 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:29:07,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 917 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:29:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2023-04-01 20:29:08,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 5400. [2023-04-01 20:29:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5400 states, 5238 states have (on average 1.3995799923634975) internal successors, (7331), 5348 states have internal predecessors, (7331), 26 states have call successors, (26), 26 states have call predecessors, (26), 135 states have return successors, (611), 25 states have call predecessors, (611), 25 states have call successors, (611) [2023-04-01 20:29:08,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5400 states to 5400 states and 7968 transitions. [2023-04-01 20:29:08,081 INFO L78 Accepts]: Start accepts. Automaton has 5400 states and 7968 transitions. Word has length 195 [2023-04-01 20:29:08,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:29:08,081 INFO L495 AbstractCegarLoop]: Abstraction has 5400 states and 7968 transitions. [2023-04-01 20:29:08,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 4 states have internal predecessors, (183), 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) [2023-04-01 20:29:08,082 INFO L276 IsEmpty]: Start isEmpty. Operand 5400 states and 7968 transitions. [2023-04-01 20:29:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-04-01 20:29:08,091 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:29:08,091 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:29:08,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 20:29:08,297 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 [2023-04-01 20:29:08,297 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:29:08,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:29:08,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1613813148, now seen corresponding path program 1 times [2023-04-01 20:29:08,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:29:08,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591725625] [2023-04-01 20:29:08,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:08,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:29:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:08,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:29:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:08,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:29:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:08,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:29:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 20:29:08,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:29:08,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591725625] [2023-04-01 20:29:08,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591725625] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:29:08,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022084527] [2023-04-01 20:29:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:08,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:29:08,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:29:08,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:29:08,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 20:29:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:09,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:29:09,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:29:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:29:09,332 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:29:09,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022084527] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:29:09,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:29:09,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 20:29:09,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713828300] [2023-04-01 20:29:09,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:29:09,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:29:09,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:29:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:29:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:29:09,334 INFO L87 Difference]: Start difference. First operand 5400 states and 7968 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2023-04-01 20:29:10,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:29:10,055 INFO L93 Difference]: Finished difference Result 15996 states and 24271 transitions. [2023-04-01 20:29:10,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:29:10,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 210 [2023-04-01 20:29:10,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:29:10,097 INFO L225 Difference]: With dead ends: 15996 [2023-04-01 20:29:10,098 INFO L226 Difference]: Without dead ends: 10602 [2023-04-01 20:29:10,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:29:10,113 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 88 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:29:10,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 230 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:29:10,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10602 states. [2023-04-01 20:29:10,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10602 to 10522. [2023-04-01 20:29:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10522 states, 10239 states have (on average 1.3901748217599375) internal successors, (14234), 10422 states have internal predecessors, (14234), 50 states have call successors, (50), 50 states have call predecessors, (50), 232 states have return successors, (1687), 49 states have call predecessors, (1687), 49 states have call successors, (1687) [2023-04-01 20:29:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10522 states to 10522 states and 15971 transitions. [2023-04-01 20:29:10,448 INFO L78 Accepts]: Start accepts. Automaton has 10522 states and 15971 transitions. Word has length 210 [2023-04-01 20:29:10,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:29:10,449 INFO L495 AbstractCegarLoop]: Abstraction has 10522 states and 15971 transitions. [2023-04-01 20:29:10,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2023-04-01 20:29:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 10522 states and 15971 transitions. [2023-04-01 20:29:10,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-04-01 20:29:10,467 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:29:10,467 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:29:10,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 20:29:10,675 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 [2023-04-01 20:29:10,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:29:10,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:29:10,677 INFO L85 PathProgramCache]: Analyzing trace with hash -348408079, now seen corresponding path program 1 times [2023-04-01 20:29:10,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:29:10,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776262] [2023-04-01 20:29:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:10,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:29:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:11,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:29:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:11,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:29:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:11,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:29:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:29:11,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:29:11,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776262] [2023-04-01 20:29:11,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776262] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:29:11,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109993634] [2023-04-01 20:29:11,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:11,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:29:11,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:29:11,613 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) [2023-04-01 20:29:11,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 20:29:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:11,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:29:11,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:29:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:29:11,991 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:29:11,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109993634] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:29:11,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:29:11,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-04-01 20:29:11,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398159393] [2023-04-01 20:29:11,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:29:11,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:29:11,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:29:11,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:29:11,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:29:11,993 INFO L87 Difference]: Start difference. First operand 10522 states and 15971 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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) [2023-04-01 20:29:12,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:29:12,769 INFO L93 Difference]: Finished difference Result 30796 states and 47634 transitions. [2023-04-01 20:29:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:29:12,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 211 [2023-04-01 20:29:12,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:29:12,833 INFO L225 Difference]: With dead ends: 30796 [2023-04-01 20:29:12,834 INFO L226 Difference]: Without dead ends: 20280 [2023-04-01 20:29:12,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:29:12,863 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 82 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:29:12,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 434 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:29:12,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20280 states. [2023-04-01 20:29:13,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20280 to 20264. [2023-04-01 20:29:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20264 states, 19779 states have (on average 1.254664037615653) internal successors, (24816), 20072 states have internal predecessors, (24816), 96 states have call successors, (96), 96 states have call predecessors, (96), 388 states have return successors, (3069), 95 states have call predecessors, (3069), 95 states have call successors, (3069) [2023-04-01 20:29:13,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20264 states to 20264 states and 27981 transitions. [2023-04-01 20:29:13,368 INFO L78 Accepts]: Start accepts. Automaton has 20264 states and 27981 transitions. Word has length 211 [2023-04-01 20:29:13,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:29:13,368 INFO L495 AbstractCegarLoop]: Abstraction has 20264 states and 27981 transitions. [2023-04-01 20:29:13,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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) [2023-04-01 20:29:13,369 INFO L276 IsEmpty]: Start isEmpty. Operand 20264 states and 27981 transitions. [2023-04-01 20:29:13,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-04-01 20:29:13,404 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:29:13,404 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-04-01 20:29:13,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 20:29:13,610 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 [2023-04-01 20:29:13,611 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:29:13,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:29:13,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2127680780, now seen corresponding path program 1 times [2023-04-01 20:29:13,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:29:13,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994597372] [2023-04-01 20:29:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:13,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:29:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:14,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:29:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:14,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:29:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:14,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:29:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:14,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 20:29:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 80 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 20:29:14,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:29:14,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994597372] [2023-04-01 20:29:14,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994597372] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:29:14,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064944870] [2023-04-01 20:29:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:14,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:29:14,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:29:14,217 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) [2023-04-01 20:29:14,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 20:29:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:14,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 1240 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:29:14,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:29:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 20:29:14,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:29:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 84 proven. 22 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 20:29:14,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064944870] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:29:14,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:29:14,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2023-04-01 20:29:14,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148715768] [2023-04-01 20:29:14,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:29:14,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:29:14,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:29:14,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:29:14,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:29:14,589 INFO L87 Difference]: Start difference. First operand 20264 states and 27981 transitions. Second operand has 8 states, 8 states have (on average 29.125) internal successors, (233), 6 states have internal predecessors, (233), 3 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:29:15,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:29:15,696 INFO L93 Difference]: Finished difference Result 39480 states and 54967 transitions. [2023-04-01 20:29:15,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:29:15,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.125) internal successors, (233), 6 states have internal predecessors, (233), 3 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 237 [2023-04-01 20:29:15,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:29:15,740 INFO L225 Difference]: With dead ends: 39480 [2023-04-01 20:29:15,740 INFO L226 Difference]: Without dead ends: 19222 [2023-04-01 20:29:15,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:29:15,766 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1026 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:29:15,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 43 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:29:15,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19222 states. [2023-04-01 20:29:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19222 to 19218. [2023-04-01 20:29:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19218 states, 18791 states have (on average 1.2395295620243734) internal successors, (23292), 19034 states have internal predecessors, (23292), 92 states have call successors, (92), 92 states have call predecessors, (92), 334 states have return successors, (2685), 91 states have call predecessors, (2685), 91 states have call successors, (2685) [2023-04-01 20:29:16,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19218 states to 19218 states and 26069 transitions. [2023-04-01 20:29:16,134 INFO L78 Accepts]: Start accepts. Automaton has 19218 states and 26069 transitions. Word has length 237 [2023-04-01 20:29:16,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:29:16,134 INFO L495 AbstractCegarLoop]: Abstraction has 19218 states and 26069 transitions. [2023-04-01 20:29:16,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.125) internal successors, (233), 6 states have internal predecessors, (233), 3 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:29:16,134 INFO L276 IsEmpty]: Start isEmpty. Operand 19218 states and 26069 transitions. [2023-04-01 20:29:16,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-04-01 20:29:16,166 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:29:16,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:29:16,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 20:29:16,372 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 [2023-04-01 20:29:16,373 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:29:16,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:29:16,374 INFO L85 PathProgramCache]: Analyzing trace with hash -330938730, now seen corresponding path program 1 times [2023-04-01 20:29:16,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:29:16,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122492077] [2023-04-01 20:29:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:16,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:29:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:17,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:29:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:17,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:29:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:17,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 20:29:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 66 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:29:17,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:29:17,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122492077] [2023-04-01 20:29:17,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122492077] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:29:17,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689440452] [2023-04-01 20:29:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:17,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:29:17,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:29:17,373 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) [2023-04-01 20:29:17,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 20:29:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:17,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:29:17,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:29:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:29:17,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:29:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:29:17,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689440452] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:29:17,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:29:17,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 20:29:17,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792696842] [2023-04-01 20:29:17,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:29:17,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 20:29:17,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:29:17,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 20:29:17,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:29:17,734 INFO L87 Difference]: Start difference. First operand 19218 states and 26069 transitions. Second operand has 11 states, 11 states have (on average 27.09090909090909) internal successors, (298), 9 states have internal predecessors, (298), 4 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 20:29:20,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:29:20,536 INFO L93 Difference]: Finished difference Result 44361 states and 61913 transitions. [2023-04-01 20:29:20,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 20:29:20,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 27.09090909090909) internal successors, (298), 9 states have internal predecessors, (298), 4 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 237 [2023-04-01 20:29:20,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:29:20,619 INFO L225 Difference]: With dead ends: 44361 [2023-04-01 20:29:20,619 INFO L226 Difference]: Without dead ends: 25149 [2023-04-01 20:29:20,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 483 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-01 20:29:20,652 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2929 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2600 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2930 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:29:20,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2930 Valid, 184 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2600 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 20:29:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25149 states. [2023-04-01 20:29:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25149 to 22819. [2023-04-01 20:29:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22819 states, 22140 states have (on average 1.227416440831075) internal successors, (27175), 22605 states have internal predecessors, (27175), 107 states have call successors, (107), 107 states have call predecessors, (107), 571 states have return successors, (3188), 106 states have call predecessors, (3188), 106 states have call successors, (3188) [2023-04-01 20:29:21,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22819 states to 22819 states and 30470 transitions. [2023-04-01 20:29:21,188 INFO L78 Accepts]: Start accepts. Automaton has 22819 states and 30470 transitions. Word has length 237 [2023-04-01 20:29:21,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:29:21,189 INFO L495 AbstractCegarLoop]: Abstraction has 22819 states and 30470 transitions. [2023-04-01 20:29:21,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.09090909090909) internal successors, (298), 9 states have internal predecessors, (298), 4 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 20:29:21,189 INFO L276 IsEmpty]: Start isEmpty. Operand 22819 states and 30470 transitions. [2023-04-01 20:29:21,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-04-01 20:29:21,227 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:29:21,227 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:29:21,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 20:29:21,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:29:21,434 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:29:21,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:29:21,434 INFO L85 PathProgramCache]: Analyzing trace with hash -2111352471, now seen corresponding path program 1 times [2023-04-01 20:29:21,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:29:21,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786054000] [2023-04-01 20:29:21,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:21,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:29:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:21,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:29:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:21,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:29:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:22,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-04-01 20:29:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 69 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:29:22,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:29:22,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786054000] [2023-04-01 20:29:22,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786054000] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:29:22,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83349031] [2023-04-01 20:29:22,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:22,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:29:22,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:29:22,035 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) [2023-04-01 20:29:22,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 20:29:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:22,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:29:22,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:29:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 20:29:22,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:29:22,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83349031] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:29:22,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:29:22,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:29:22,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922989046] [2023-04-01 20:29:22,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:29:22,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:29:22,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:29:22,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:29:22,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:29:22,283 INFO L87 Difference]: Start difference. First operand 22819 states and 30470 transitions. Second operand has 5 states, 5 states have (on average 41.8) internal successors, (209), 4 states have internal predecessors, (209), 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) [2023-04-01 20:29:23,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:29:23,447 INFO L93 Difference]: Finished difference Result 62706 states and 87956 transitions. [2023-04-01 20:29:23,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 20:29:23,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 4 states have internal predecessors, (209), 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 240 [2023-04-01 20:29:23,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:29:23,575 INFO L225 Difference]: With dead ends: 62706 [2023-04-01 20:29:23,575 INFO L226 Difference]: Without dead ends: 40520 [2023-04-01 20:29:23,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:29:23,618 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 703 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:29:23,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 133 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:29:23,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40520 states. [2023-04-01 20:29:24,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40520 to 39372. [2023-04-01 20:29:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39372 states, 38165 states have (on average 1.2116860998296868) internal successors, (46244), 39006 states have internal predecessors, (46244), 183 states have call successors, (183), 183 states have call predecessors, (183), 1023 states have return successors, (6163), 182 states have call predecessors, (6163), 182 states have call successors, (6163) [2023-04-01 20:29:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39372 states to 39372 states and 52590 transitions. [2023-04-01 20:29:24,513 INFO L78 Accepts]: Start accepts. Automaton has 39372 states and 52590 transitions. Word has length 240 [2023-04-01 20:29:24,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:29:24,513 INFO L495 AbstractCegarLoop]: Abstraction has 39372 states and 52590 transitions. [2023-04-01 20:29:24,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.8) internal successors, (209), 4 states have internal predecessors, (209), 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) [2023-04-01 20:29:24,514 INFO L276 IsEmpty]: Start isEmpty. Operand 39372 states and 52590 transitions. [2023-04-01 20:29:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-04-01 20:29:24,567 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:29:24,567 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:29:24,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 20:29:24,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:29:24,774 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:29:24,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:29:24,774 INFO L85 PathProgramCache]: Analyzing trace with hash 121471356, now seen corresponding path program 1 times [2023-04-01 20:29:24,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:29:24,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349142512] [2023-04-01 20:29:24,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:24,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:29:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:25,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:29:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:25,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:29:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:25,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:29:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:25,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-04-01 20:29:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:25,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-04-01 20:29:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 127 proven. 18 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-04-01 20:29:25,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:29:25,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349142512] [2023-04-01 20:29:25,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349142512] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:29:25,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274246263] [2023-04-01 20:29:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:25,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:29:25,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:29:25,175 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:29:25,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 20:29:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:25,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:29:25,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:29:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 20:29:25,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:29:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 129 proven. 19 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 20:29:25,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274246263] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:29:25,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:29:25,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:29:25,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083572042] [2023-04-01 20:29:25,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:29:25,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:29:25,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:29:25,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:29:25,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:29:25,728 INFO L87 Difference]: Start difference. First operand 39372 states and 52590 transitions. Second operand has 12 states, 12 states have (on average 21.833333333333332) internal successors, (262), 10 states have internal predecessors, (262), 4 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 20:29:32,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:29:32,207 INFO L93 Difference]: Finished difference Result 104033 states and 153904 transitions. [2023-04-01 20:29:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-01 20:29:32,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.833333333333332) internal successors, (262), 10 states have internal predecessors, (262), 4 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 267 [2023-04-01 20:29:32,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:29:32,209 INFO L225 Difference]: With dead ends: 104033 [2023-04-01 20:29:32,209 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 20:29:32,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 575 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=500, Invalid=2362, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 20:29:32,315 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 2205 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 4949 mSolverCounterSat, 690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2219 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 5639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 690 IncrementalHoareTripleChecker+Valid, 4949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:29:32,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2219 Valid, 314 Invalid, 5639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [690 Valid, 4949 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 20:29:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 20:29:32,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 20:29:32,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 20:29:32,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 20:29:32,316 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 267 [2023-04-01 20:29:32,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:29:32,316 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 20:29:32,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.833333333333332) internal successors, (262), 10 states have internal predecessors, (262), 4 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 20:29:32,316 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 20:29:32,316 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 20:29:32,318 INFO L805 garLoopResultBuilder]: Registering result SAFE for location calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 20:29:32,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 20:29:32,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:29:32,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.