/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_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:25:44,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:25:44,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:25:44,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 20:25:44,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:25:44,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:25:44,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:25:44,362 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 20:25:44,393 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:25:44,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:25:44,394 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:25:44,394 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:25:44,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:25:44,396 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:25:44,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:25:44,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:25:44,397 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:25:44,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:25:44,397 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:25:44,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:25:44,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:25:44,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:25:44,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:25:44,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:25:44,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:25:44,398 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:25:44,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:25:44,398 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:25:44,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:25:44,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:25:44,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:25:44,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:25:44,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:25:44,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:25:44,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:25:44,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:25:44,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:25:44,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:25:44,400 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:25:44,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:25:44,400 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:25:44,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:25:44,401 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:25:44,401 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:25:44,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:25:44,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:25:44,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:25:44,663 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:25:44,663 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:25:44,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label18.c [2023-04-01 20:25:45,828 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:25:46,137 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:25:46,137 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label18.c [2023-04-01 20:25:46,152 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121eec819/bc069d05e3c646e987e27291b746806a/FLAG39026f306 [2023-04-01 20:25:46,166 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/121eec819/bc069d05e3c646e987e27291b746806a [2023-04-01 20:25:46,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:25:46,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:25:46,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:25:46,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:25:46,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:25:46,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:25:46" (1/1) ... [2023-04-01 20:25:46,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28be9dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:46, skipping insertion in model container [2023-04-01 20:25:46,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:25:46" (1/1) ... [2023-04-01 20:25:46,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:25:46,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:25:46,745 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_label18.c[61636,61649] [2023-04-01 20:25:46,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:25:46,787 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:25:47,013 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_label18.c[61636,61649] [2023-04-01 20:25:47,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:25:47,035 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:25:47,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:47 WrapperNode [2023-04-01 20:25:47,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:25:47,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:25:47,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:25:47,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:25:47,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:47" (1/1) ... [2023-04-01 20:25:47,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:47" (1/1) ... [2023-04-01 20:25:47,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:47" (1/1) ... [2023-04-01 20:25:47,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:47" (1/1) ... [2023-04-01 20:25:47,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:47" (1/1) ... [2023-04-01 20:25:47,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:47" (1/1) ... [2023-04-01 20:25:47,169 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:47" (1/1) ... [2023-04-01 20:25:47,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:47" (1/1) ... [2023-04-01 20:25:47,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:25:47,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:25:47,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:25:47,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:25:47,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:47" (1/1) ... [2023-04-01 20:25:47,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:25:47,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:25:47,216 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 20:25:47,237 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 20:25:47,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:25:47,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:25:47,260 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:25:47,260 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 20:25:47,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:25:47,260 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 20:25:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:25:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:25:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:25:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:25:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:25:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 20:25:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:25:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:25:47,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:25:47,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:25:47,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:25:47,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:25:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:25:47,363 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:25:47,365 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:25:48,835 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:25:48,854 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:25:48,854 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 20:25:48,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:25:48 BoogieIcfgContainer [2023-04-01 20:25:48,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:25:48,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:25:48,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:25:48,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:25:48,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:25:46" (1/3) ... [2023-04-01 20:25:48,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f218498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:25:48, skipping insertion in model container [2023-04-01 20:25:48,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:47" (2/3) ... [2023-04-01 20:25:48,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f218498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:25:48, skipping insertion in model container [2023-04-01 20:25:48,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:25:48" (3/3) ... [2023-04-01 20:25:48,867 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label18.c [2023-04-01 20:25:48,882 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:25:48,882 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:25:48,941 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:25:48,948 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;@33b088f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:25:48,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:25:48,956 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 20:25:48,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-04-01 20:25:48,973 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:25:48,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:25:48,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:25:48,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:25:48,978 INFO L85 PathProgramCache]: Analyzing trace with hash 665682321, now seen corresponding path program 1 times [2023-04-01 20:25:48,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:25:48,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655565580] [2023-04-01 20:25:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:25:48,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:25:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:50,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:25:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:50,550 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 20:25:50,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:25:50,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655565580] [2023-04-01 20:25:50,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655565580] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:25:50,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:25:50,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 20:25:50,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460852401] [2023-04-01 20:25:50,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:25:50,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:25:50,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:25:50,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:25:50,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:25:50,593 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 20:25:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:25:52,770 INFO L93 Difference]: Finished difference Result 867 states and 1525 transitions. [2023-04-01 20:25:52,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:25:52,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 209 [2023-04-01 20:25:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:25:52,784 INFO L225 Difference]: With dead ends: 867 [2023-04-01 20:25:52,785 INFO L226 Difference]: Without dead ends: 478 [2023-04-01 20:25:52,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:25:52,793 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 600 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 20:25:52,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 51 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 20:25:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-04-01 20:25:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 463. [2023-04-01 20:25:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 453 states have (on average 1.5827814569536425) internal successors, (717), 455 states have internal predecessors, (717), 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 20:25:52,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 728 transitions. [2023-04-01 20:25:52,855 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 728 transitions. Word has length 209 [2023-04-01 20:25:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:25:52,856 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 728 transitions. [2023-04-01 20:25:52,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 20:25:52,857 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 728 transitions. [2023-04-01 20:25:52,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-04-01 20:25:52,861 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:25:52,862 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:25:52,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:25:52,862 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:25:52,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:25:52,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1669691502, now seen corresponding path program 1 times [2023-04-01 20:25:52,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:25:52,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321332641] [2023-04-01 20:25:52,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:25:52,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:25:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:53,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:25:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:53,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:25:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:25:53,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:25:53,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321332641] [2023-04-01 20:25:53,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321332641] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:25:53,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:25:53,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 20:25:53,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662439578] [2023-04-01 20:25:53,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:25:53,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:25:53,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:25:53,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:25:53,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:25:53,683 INFO L87 Difference]: Start difference. First operand 463 states and 728 transitions. Second operand has 8 states, 7 states have (on average 30.428571428571427) internal successors, (213), 5 states have internal predecessors, (213), 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 20:25:56,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:25:56,305 INFO L93 Difference]: Finished difference Result 1812 states and 2914 transitions. [2023-04-01 20:25:56,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 20:25:56,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 30.428571428571427) internal successors, (213), 5 states have internal predecessors, (213), 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 219 [2023-04-01 20:25:56,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:25:56,314 INFO L225 Difference]: With dead ends: 1812 [2023-04-01 20:25:56,314 INFO L226 Difference]: Without dead ends: 1355 [2023-04-01 20:25:56,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:25:56,316 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1304 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:25:56,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1304 Valid, 153 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 20:25:56,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2023-04-01 20:25:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1335. [2023-04-01 20:25:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1307 states have (on average 1.4506503442999235) internal successors, (1896), 1319 states have internal predecessors, (1896), 8 states have call successors, (8), 8 states have call predecessors, (8), 19 states have return successors, (51), 7 states have call predecessors, (51), 7 states have call successors, (51) [2023-04-01 20:25:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1955 transitions. [2023-04-01 20:25:56,410 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1955 transitions. Word has length 219 [2023-04-01 20:25:56,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:25:56,415 INFO L495 AbstractCegarLoop]: Abstraction has 1335 states and 1955 transitions. [2023-04-01 20:25:56,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 30.428571428571427) internal successors, (213), 5 states have internal predecessors, (213), 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 20:25:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1955 transitions. [2023-04-01 20:25:56,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-04-01 20:25:56,421 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:25:56,421 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:25:56,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:25:56,422 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:25:56,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:25:56,422 INFO L85 PathProgramCache]: Analyzing trace with hash -718014865, now seen corresponding path program 1 times [2023-04-01 20:25:56,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:25:56,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766667675] [2023-04-01 20:25:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:25:56,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:25:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:56,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:25:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:57,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:25:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:57,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 20:25:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:25:57,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:25:57,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766667675] [2023-04-01 20:25:57,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766667675] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:25:57,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263737671] [2023-04-01 20:25:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:25:57,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:25:57,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:25:57,069 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 20:25:57,100 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 20:25:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:57,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:25:57,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:25:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:25:57,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:25:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:25:57,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263737671] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:25:57,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:25:57,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-04-01 20:25:57,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941510546] [2023-04-01 20:25:57,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:25:57,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 20:25:57,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:25:57,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 20:25:57,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:25:57,650 INFO L87 Difference]: Start difference. First operand 1335 states and 1955 transitions. Second operand has 13 states, 13 states have (on average 19.076923076923077) internal successors, (248), 11 states have internal predecessors, (248), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:26:03,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:03,673 INFO L93 Difference]: Finished difference Result 9484 states and 16765 transitions. [2023-04-01 20:26:03,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-04-01 20:26:03,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 19.076923076923077) internal successors, (248), 11 states have internal predecessors, (248), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 231 [2023-04-01 20:26:03,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:03,730 INFO L225 Difference]: With dead ends: 9484 [2023-04-01 20:26:03,731 INFO L226 Difference]: Without dead ends: 8155 [2023-04-01 20:26:03,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=614, Invalid=2692, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 20:26:03,743 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 3455 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 3854 mSolverCounterSat, 1363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3455 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 5217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1363 IncrementalHoareTripleChecker+Valid, 3854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:03,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3455 Valid, 317 Invalid, 5217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1363 Valid, 3854 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 20:26:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8155 states. [2023-04-01 20:26:04,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8155 to 7915. [2023-04-01 20:26:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7915 states, 7662 states have (on average 1.2413208039676324) internal successors, (9511), 7839 states have internal predecessors, (9511), 38 states have call successors, (38), 38 states have call predecessors, (38), 214 states have return successors, (1264), 37 states have call predecessors, (1264), 37 states have call successors, (1264) [2023-04-01 20:26:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7915 states to 7915 states and 10813 transitions. [2023-04-01 20:26:04,077 INFO L78 Accepts]: Start accepts. Automaton has 7915 states and 10813 transitions. Word has length 231 [2023-04-01 20:26:04,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:04,078 INFO L495 AbstractCegarLoop]: Abstraction has 7915 states and 10813 transitions. [2023-04-01 20:26:04,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.076923076923077) internal successors, (248), 11 states have internal predecessors, (248), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:26:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 7915 states and 10813 transitions. [2023-04-01 20:26:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-04-01 20:26:04,098 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:04,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:04,107 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 20:26:04,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:04,306 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:04,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:04,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2135616052, now seen corresponding path program 1 times [2023-04-01 20:26:04,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:04,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436847648] [2023-04-01 20:26:04,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:04,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:05,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:05,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:05,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:05,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436847648] [2023-04-01 20:26:05,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436847648] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:05,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:26:05,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:26:05,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447396902] [2023-04-01 20:26:05,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:05,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:26:05,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:05,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:26:05,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:26:05,460 INFO L87 Difference]: Start difference. First operand 7915 states and 10813 transitions. Second operand has 7 states, 6 states have (on average 41.333333333333336) internal successors, (248), 4 states have internal predecessors, (248), 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 20:26:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:07,343 INFO L93 Difference]: Finished difference Result 19822 states and 27851 transitions. [2023-04-01 20:26:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 20:26:07,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 41.333333333333336) internal successors, (248), 4 states have internal predecessors, (248), 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 254 [2023-04-01 20:26:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:07,395 INFO L225 Difference]: With dead ends: 19822 [2023-04-01 20:26:07,395 INFO L226 Difference]: Without dead ends: 11913 [2023-04-01 20:26:07,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:26:07,417 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1546 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:07,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1546 Valid, 112 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 20:26:07,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11913 states. [2023-04-01 20:26:07,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11913 to 11810. [2023-04-01 20:26:07,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11810 states, 11441 states have (on average 1.2164146490691372) internal successors, (13917), 11698 states have internal predecessors, (13917), 56 states have call successors, (56), 56 states have call predecessors, (56), 312 states have return successors, (1810), 55 states have call predecessors, (1810), 55 states have call successors, (1810) [2023-04-01 20:26:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11810 states to 11810 states and 15783 transitions. [2023-04-01 20:26:07,943 INFO L78 Accepts]: Start accepts. Automaton has 11810 states and 15783 transitions. Word has length 254 [2023-04-01 20:26:07,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:07,945 INFO L495 AbstractCegarLoop]: Abstraction has 11810 states and 15783 transitions. [2023-04-01 20:26:07,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 41.333333333333336) internal successors, (248), 4 states have internal predecessors, (248), 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 20:26:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 11810 states and 15783 transitions. [2023-04-01 20:26:07,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-04-01 20:26:07,974 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:07,974 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:07,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 20:26:07,975 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:07,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:07,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2115060092, now seen corresponding path program 1 times [2023-04-01 20:26:07,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:07,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716496996] [2023-04-01 20:26:07,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:07,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:08,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:09,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:09,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:26:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:26:09,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:09,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716496996] [2023-04-01 20:26:09,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716496996] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:09,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093409003] [2023-04-01 20:26:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:09,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:09,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:09,217 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 20:26:09,229 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 20:26:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:09,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:26:09,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:26:09,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:26:09,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093409003] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:09,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:26:09,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 20:26:09,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677901457] [2023-04-01 20:26:09,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:09,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:26:09,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:09,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:26:09,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:26:09,717 INFO L87 Difference]: Start difference. First operand 11810 states and 15783 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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 20:26:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:10,552 INFO L93 Difference]: Finished difference Result 23616 states and 31564 transitions. [2023-04-01 20:26:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:26:10,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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 265 [2023-04-01 20:26:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:10,593 INFO L225 Difference]: With dead ends: 23616 [2023-04-01 20:26:10,593 INFO L226 Difference]: Without dead ends: 11812 [2023-04-01 20:26:10,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:26:10,622 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 78 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:10,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 110 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:26:10,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11812 states. [2023-04-01 20:26:10,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11812 to 11808. [2023-04-01 20:26:10,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11808 states, 11440 states have (on average 1.2048951048951049) internal successors, (13784), 11696 states have internal predecessors, (13784), 56 states have call successors, (56), 56 states have call predecessors, (56), 311 states have return successors, (1614), 55 states have call predecessors, (1614), 55 states have call successors, (1614) [2023-04-01 20:26:11,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11808 states to 11808 states and 15454 transitions. [2023-04-01 20:26:11,012 INFO L78 Accepts]: Start accepts. Automaton has 11808 states and 15454 transitions. Word has length 265 [2023-04-01 20:26:11,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:11,013 INFO L495 AbstractCegarLoop]: Abstraction has 11808 states and 15454 transitions. [2023-04-01 20:26:11,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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 20:26:11,014 INFO L276 IsEmpty]: Start isEmpty. Operand 11808 states and 15454 transitions. [2023-04-01 20:26:11,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-04-01 20:26:11,040 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:11,040 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:26:11,051 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 20:26:11,247 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 20:26:11,248 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:11,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:11,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1241312895, now seen corresponding path program 1 times [2023-04-01 20:26:11,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:11,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125164484] [2023-04-01 20:26:11,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:11,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:12,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:12,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:12,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:26:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:12,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 20:26:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:12,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-04-01 20:26:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 92 proven. 65 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 20:26:12,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:12,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125164484] [2023-04-01 20:26:12,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125164484] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:12,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825648798] [2023-04-01 20:26:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:12,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:12,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:12,718 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 20:26:12,721 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 20:26:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:12,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 1431 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 20:26:12,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 85 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 20:26:13,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:26:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 20:26:13,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825648798] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:13,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:26:13,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 14 [2023-04-01 20:26:13,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272411444] [2023-04-01 20:26:13,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:13,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:26:13,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:13,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:26:13,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-04-01 20:26:13,555 INFO L87 Difference]: Start difference. First operand 11808 states and 15454 transitions. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 4 states have internal predecessors, (242), 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 20:26:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:14,523 INFO L93 Difference]: Finished difference Result 34160 states and 45267 transitions. [2023-04-01 20:26:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:26:14,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 4 states have internal predecessors, (242), 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 303 [2023-04-01 20:26:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:14,590 INFO L225 Difference]: With dead ends: 34160 [2023-04-01 20:26:14,591 INFO L226 Difference]: Without dead ends: 22358 [2023-04-01 20:26:14,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 601 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:26:14,624 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 517 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:14,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 168 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 20:26:14,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22358 states. [2023-04-01 20:26:15,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22358 to 22320. [2023-04-01 20:26:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22320 states, 21682 states have (on average 1.1797343418503827) internal successors, (25579), 22110 states have internal predecessors, (25579), 105 states have call successors, (105), 105 states have call predecessors, (105), 532 states have return successors, (3159), 104 states have call predecessors, (3159), 104 states have call successors, (3159) [2023-04-01 20:26:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22320 states to 22320 states and 28843 transitions. [2023-04-01 20:26:15,226 INFO L78 Accepts]: Start accepts. Automaton has 22320 states and 28843 transitions. Word has length 303 [2023-04-01 20:26:15,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:15,226 INFO L495 AbstractCegarLoop]: Abstraction has 22320 states and 28843 transitions. [2023-04-01 20:26:15,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 4 states have internal predecessors, (242), 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 20:26:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 22320 states and 28843 transitions. [2023-04-01 20:26:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-04-01 20:26:15,276 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:15,277 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:26:15,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 20:26:15,484 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 20:26:15,485 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:15,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:15,485 INFO L85 PathProgramCache]: Analyzing trace with hash -253193735, now seen corresponding path program 1 times [2023-04-01 20:26:15,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:15,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601853642] [2023-04-01 20:26:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:15,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:16,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:16,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:16,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:26:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:16,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-04-01 20:26:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:16,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-04-01 20:26:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 98 proven. 58 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 20:26:16,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601853642] [2023-04-01 20:26:16,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601853642] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:16,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126778634] [2023-04-01 20:26:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:16,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:16,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:16,803 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 20:26:16,804 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 20:26:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:17,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:26:17,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 20:26:17,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:26:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 122 proven. 17 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-04-01 20:26:17,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126778634] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:26:17,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:26:17,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2023-04-01 20:26:17,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282753150] [2023-04-01 20:26:17,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:26:17,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 20:26:17,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:17,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 20:26:17,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-04-01 20:26:17,239 INFO L87 Difference]: Start difference. First operand 22320 states and 28843 transitions. Second operand has 14 states, 14 states have (on average 22.571428571428573) internal successors, (316), 12 states have internal predecessors, (316), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 20:26:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:25,807 INFO L93 Difference]: Finished difference Result 92336 states and 136381 transitions. [2023-04-01 20:26:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-01 20:26:25,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 22.571428571428573) internal successors, (316), 12 states have internal predecessors, (316), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 306 [2023-04-01 20:26:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:26,149 INFO L225 Difference]: With dead ends: 92336 [2023-04-01 20:26:26,149 INFO L226 Difference]: Without dead ends: 70022 [2023-04-01 20:26:26,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=590, Invalid=1960, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 20:26:26,219 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 4120 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 8240 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4120 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 8899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 8240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:26,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4120 Valid, 273 Invalid, 8899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 8240 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-04-01 20:26:26,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70022 states. [2023-04-01 20:26:28,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70022 to 67591. [2023-04-01 20:26:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67591 states, 65907 states have (on average 1.155112507017464) internal successors, (76130), 66717 states have internal predecessors, (76130), 559 states have call successors, (559), 315 states have call predecessors, (559), 1124 states have return successors, (15845), 558 states have call predecessors, (15845), 558 states have call successors, (15845) [2023-04-01 20:26:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67591 states to 67591 states and 92534 transitions. [2023-04-01 20:26:28,986 INFO L78 Accepts]: Start accepts. Automaton has 67591 states and 92534 transitions. Word has length 306 [2023-04-01 20:26:28,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:28,987 INFO L495 AbstractCegarLoop]: Abstraction has 67591 states and 92534 transitions. [2023-04-01 20:26:28,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.571428571428573) internal successors, (316), 12 states have internal predecessors, (316), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 20:26:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand 67591 states and 92534 transitions. [2023-04-01 20:26:29,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-04-01 20:26:29,131 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:29,132 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:29,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 20:26:29,339 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 20:26:29,340 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:29,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:29,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1083393456, now seen corresponding path program 1 times [2023-04-01 20:26:29,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:29,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488332992] [2023-04-01 20:26:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:29,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:29,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:29,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:29,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:26:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:26:30,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:30,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488332992] [2023-04-01 20:26:30,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488332992] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:30,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844515013] [2023-04-01 20:26:30,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:30,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:30,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:30,061 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 20:26:30,063 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 20:26:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:30,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:26:30,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:30,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:26:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:30,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844515013] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:26:30,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:26:30,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:26:30,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349455032] [2023-04-01 20:26:30,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:26:30,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:26:30,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:30,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:26:30,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:26:30,695 INFO L87 Difference]: Start difference. First operand 67591 states and 92534 transitions. Second operand has 12 states, 12 states have (on average 37.75) internal successors, (453), 10 states have internal predecessors, (453), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:26:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:43,417 INFO L93 Difference]: Finished difference Result 204657 states and 343579 transitions. [2023-04-01 20:26:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-04-01 20:26:43,421 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 37.75) internal successors, (453), 10 states have internal predecessors, (453), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 308 [2023-04-01 20:26:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:44,415 INFO L225 Difference]: With dead ends: 204657 [2023-04-01 20:26:44,415 INFO L226 Difference]: Without dead ends: 137696 [2023-04-01 20:26:44,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 656 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=527, Invalid=2895, Unknown=0, NotChecked=0, Total=3422 [2023-04-01 20:26:44,607 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 2131 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 8839 mSolverCounterSat, 863 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2145 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 9702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 863 IncrementalHoareTripleChecker+Valid, 8839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:44,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2145 Valid, 449 Invalid, 9702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [863 Valid, 8839 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-04-01 20:26:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137696 states. [2023-04-01 20:26:49,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137696 to 125381. [2023-04-01 20:26:49,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125381 states, 122390 states have (on average 1.113988070920827) internal successors, (136341), 123686 states have internal predecessors, (136341), 1111 states have call successors, (1111), 584 states have call predecessors, (1111), 1879 states have return successors, (24124), 1110 states have call predecessors, (24124), 1110 states have call successors, (24124) [2023-04-01 20:26:49,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125381 states to 125381 states and 161576 transitions. [2023-04-01 20:26:49,569 INFO L78 Accepts]: Start accepts. Automaton has 125381 states and 161576 transitions. Word has length 308 [2023-04-01 20:26:49,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:49,570 INFO L495 AbstractCegarLoop]: Abstraction has 125381 states and 161576 transitions. [2023-04-01 20:26:49,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.75) internal successors, (453), 10 states have internal predecessors, (453), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:26:49,570 INFO L276 IsEmpty]: Start isEmpty. Operand 125381 states and 161576 transitions. [2023-04-01 20:26:50,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-04-01 20:26:50,187 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:50,187 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:50,198 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 20:26:50,395 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 20:26:50,396 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:50,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:50,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1886910954, now seen corresponding path program 1 times [2023-04-01 20:26:50,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:50,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603676000] [2023-04-01 20:26:50,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:50,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:51,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:51,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:51,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:26:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:51,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-04-01 20:26:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:51,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-04-01 20:26:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 170 proven. 7 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-01 20:26:51,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:51,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603676000] [2023-04-01 20:26:51,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603676000] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:51,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237274107] [2023-04-01 20:26:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:51,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:51,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:51,290 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 20:26:51,320 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 20:26:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:51,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:26:51,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 235 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 20:26:51,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:26:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 235 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 20:26:51,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237274107] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:26:51,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:26:51,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:26:51,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748228834] [2023-04-01 20:26:51,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:26:51,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:26:51,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:51,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:26:51,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:26:51,955 INFO L87 Difference]: Start difference. First operand 125381 states and 161576 transitions. Second operand has 12 states, 12 states have (on average 35.25) internal successors, (423), 10 states have internal predecessors, (423), 4 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 20:27:05,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:05,253 INFO L93 Difference]: Finished difference Result 345292 states and 504720 transitions. [2023-04-01 20:27:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-01 20:27:05,254 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 35.25) internal successors, (423), 10 states have internal predecessors, (423), 4 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 372 [2023-04-01 20:27:05,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:06,879 INFO L225 Difference]: With dead ends: 345292 [2023-04-01 20:27:06,880 INFO L226 Difference]: Without dead ends: 254302 [2023-04-01 20:27:07,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 781 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=431, Invalid=1921, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 20:27:07,275 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 2302 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 6524 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2306 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 7001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 6524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:07,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2306 Valid, 439 Invalid, 7001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 6524 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-01 20:27:07,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254302 states. [2023-04-01 20:27:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254302 to 242574. [2023-04-01 20:27:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242574 states, 235883 states have (on average 1.097989257386077) internal successors, (258997), 238615 states have internal predecessors, (258997), 2847 states have call successors, (2847), 1112 states have call predecessors, (2847), 3843 states have return successors, (59096), 2846 states have call predecessors, (59096), 2846 states have call successors, (59096) [2023-04-01 20:27:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242574 states to 242574 states and 320940 transitions. [2023-04-01 20:27:16,283 INFO L78 Accepts]: Start accepts. Automaton has 242574 states and 320940 transitions. Word has length 372 [2023-04-01 20:27:16,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:16,284 INFO L495 AbstractCegarLoop]: Abstraction has 242574 states and 320940 transitions. [2023-04-01 20:27:16,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 35.25) internal successors, (423), 10 states have internal predecessors, (423), 4 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 20:27:16,284 INFO L276 IsEmpty]: Start isEmpty. Operand 242574 states and 320940 transitions. [2023-04-01 20:27:17,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2023-04-01 20:27:17,051 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:17,051 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2023-04-01 20:27:17,060 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 20:27:17,259 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 20:27:17,260 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:17,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:17,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1973406082, now seen corresponding path program 1 times [2023-04-01 20:27:17,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:17,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120614985] [2023-04-01 20:27:17,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:17,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:17,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:17,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:17,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 20:27:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:17,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-04-01 20:27:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 219 proven. 30 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-04-01 20:27:18,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:18,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120614985] [2023-04-01 20:27:18,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120614985] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:18,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218595093] [2023-04-01 20:27:18,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:18,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:18,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:18,031 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 20:27:18,073 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 20:27:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:18,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:27:18,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 249 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-01 20:27:18,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:27:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 220 proven. 31 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-01 20:27:18,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218595093] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:27:18,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:27:18,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2023-04-01 20:27:18,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263243039] [2023-04-01 20:27:18,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:27:18,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:27:18,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:18,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:27:18,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:27:18,545 INFO L87 Difference]: Start difference. First operand 242574 states and 320940 transitions. Second operand has 8 states, 8 states have (on average 45.5) internal successors, (364), 6 states have internal predecessors, (364), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 20:27:29,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:29,015 INFO L93 Difference]: Finished difference Result 437155 states and 607905 transitions. [2023-04-01 20:27:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 20:27:29,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 45.5) internal successors, (364), 6 states have internal predecessors, (364), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 405 [2023-04-01 20:27:29,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:30,266 INFO L225 Difference]: With dead ends: 437155 [2023-04-01 20:27:30,267 INFO L226 Difference]: Without dead ends: 195446 [2023-04-01 20:27:30,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 821 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:27:30,794 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 797 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 2363 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:30,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 123 Invalid, 2571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2363 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 20:27:30,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195446 states. [2023-04-01 20:27:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195446 to 189005. [2023-04-01 20:27:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189005 states, 183369 states have (on average 1.0750835746500227) internal successors, (197137), 185894 states have internal predecessors, (197137), 2249 states have call successors, (2249), 862 states have call predecessors, (2249), 3386 states have return successors, (37095), 2248 states have call predecessors, (37095), 2248 states have call successors, (37095) [2023-04-01 20:27:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189005 states to 189005 states and 236481 transitions. [2023-04-01 20:27:36,971 INFO L78 Accepts]: Start accepts. Automaton has 189005 states and 236481 transitions. Word has length 405 [2023-04-01 20:27:36,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:36,971 INFO L495 AbstractCegarLoop]: Abstraction has 189005 states and 236481 transitions. [2023-04-01 20:27:36,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 45.5) internal successors, (364), 6 states have internal predecessors, (364), 3 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 20:27:36,971 INFO L276 IsEmpty]: Start isEmpty. Operand 189005 states and 236481 transitions. [2023-04-01 20:27:37,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2023-04-01 20:27:37,326 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:37,326 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:27:37,335 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 20:27:37,533 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 20:27:37,534 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:37,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:37,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2016809948, now seen corresponding path program 1 times [2023-04-01 20:27:37,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:37,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011278709] [2023-04-01 20:27:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:37,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:38,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:38,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:38,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:27:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:38,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-04-01 20:27:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:38,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2023-04-01 20:27:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 222 proven. 128 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 20:27:38,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:38,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011278709] [2023-04-01 20:27:38,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011278709] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:38,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138166185] [2023-04-01 20:27:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:38,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:38,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:38,966 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:27:38,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 20:27:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:39,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 1576 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 20:27:39,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2023-04-01 20:27:39,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:27:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 223 proven. 130 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-01 20:27:39,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138166185] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:27:39,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:27:39,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 15 [2023-04-01 20:27:39,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044301] [2023-04-01 20:27:39,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:27:39,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:27:39,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:39,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:27:39,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:27:39,806 INFO L87 Difference]: Start difference. First operand 189005 states and 236481 transitions. Second operand has 15 states, 15 states have (on average 33.6) internal successors, (504), 13 states have internal predecessors, (504), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:27:48,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:48,223 INFO L93 Difference]: Finished difference Result 321945 states and 405199 transitions. [2023-04-01 20:27:48,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 20:27:48,224 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 33.6) internal successors, (504), 13 states have internal predecessors, (504), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 429 [2023-04-01 20:27:48,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:49,253 INFO L225 Difference]: With dead ends: 321945 [2023-04-01 20:27:49,253 INFO L226 Difference]: Without dead ends: 194896 [2023-04-01 20:27:49,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 923 GetRequests, 882 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 20:27:49,462 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2267 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 2605 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2267 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 3250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 2605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:49,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2267 Valid, 237 Invalid, 3250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 2605 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 20:27:49,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194896 states.