/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/Problem15_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:05:05,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:05:05,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:05:05,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 23:05:05,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 23:05:05,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 23:05:05,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 23:05:05,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 23:05:05,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 23:05:05,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 23:05:05,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 23:05:05,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 23:05:05,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 23:05:05,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 23:05:05,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 23:05:05,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 23:05:05,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 23:05:05,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:05:05,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:05:05,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:05:05,288 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 23:05:05,309 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:05:05,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:05:05,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:05:05,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:05:05,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:05:05,310 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:05:05,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:05:05,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:05:05,311 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:05:05,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:05:05,312 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:05:05,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:05:05,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:05:05,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:05:05,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:05:05,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:05:05,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:05:05,312 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:05:05,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:05:05,312 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:05:05,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:05:05,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:05:05,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:05:05,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:05:05,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:05:05,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:05:05,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:05:05,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:05:05,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:05:05,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:05:05,313 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:05:05,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:05:05,314 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:05:05,314 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:05:05,314 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:05:05,314 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:05:05,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:05:05,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:05:05,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:05:05,506 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:05:05,507 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:05:05,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label44.c [2023-04-01 23:05:06,507 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:05:06,817 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:05:06,818 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label44.c [2023-04-01 23:05:06,835 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b11607c2e/97e3dfd39ed049f49d9ca8bd2febe204/FLAG6c8b0ecc0 [2023-04-01 23:05:06,848 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b11607c2e/97e3dfd39ed049f49d9ca8bd2febe204 [2023-04-01 23:05:06,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:05:06,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:05:06,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:05:06,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:05:06,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:05:06,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:05:06" (1/1) ... [2023-04-01 23:05:06,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19b3ec26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:05:06, skipping insertion in model container [2023-04-01 23:05:06,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:05:06" (1/1) ... [2023-04-01 23:05:06,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:05:06,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:05:07,093 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/Problem15_label44.c[8025,8038] [2023-04-01 23:05:07,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:05:07,335 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:05:07,362 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label44.c[8025,8038] [2023-04-01 23:05:07,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:05:07,527 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:05:07,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:05:07 WrapperNode [2023-04-01 23:05:07,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:05:07,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:05:07,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:05:07,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:05:07,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:05:07" (1/1) ... [2023-04-01 23:05:07,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:05:07" (1/1) ... [2023-04-01 23:05:07,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:05:07" (1/1) ... [2023-04-01 23:05:07,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:05:07" (1/1) ... [2023-04-01 23:05:07,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:05:07" (1/1) ... [2023-04-01 23:05:07,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:05:07" (1/1) ... [2023-04-01 23:05:07,654 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:05:07" (1/1) ... [2023-04-01 23:05:07,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:05:07" (1/1) ... [2023-04-01 23:05:07,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:05:07,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:05:07,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:05:07,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:05:07,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:05:07" (1/1) ... [2023-04-01 23:05:07,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:05:07,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:05:07,702 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 23:05:07,720 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 23:05:07,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:05:07,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:05:07,733 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:05:07,733 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:05:07,733 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:05:07,733 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:05:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:05:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:05:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:05:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:05:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:05:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:05:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:05:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:05:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:05:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:05:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:05:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:05:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:05:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:05:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:05:07,809 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:05:07,811 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:05:09,591 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:05:09,603 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:05:09,603 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:05:09,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:05:09 BoogieIcfgContainer [2023-04-01 23:05:09,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:05:09,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:05:09,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:05:09,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:05:09,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:05:06" (1/3) ... [2023-04-01 23:05:09,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b1c824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:05:09, skipping insertion in model container [2023-04-01 23:05:09,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:05:07" (2/3) ... [2023-04-01 23:05:09,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b1c824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:05:09, skipping insertion in model container [2023-04-01 23:05:09,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:05:09" (3/3) ... [2023-04-01 23:05:09,611 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label44.c [2023-04-01 23:05:09,623 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:05:09,623 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:05:09,659 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:05:09,663 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;@2e828db9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:05:09,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:05:09,667 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 23:05:09,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 23:05:09,675 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:09,675 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] [2023-04-01 23:05:09,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:09,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:09,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1797826073, now seen corresponding path program 1 times [2023-04-01 23:05:09,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:09,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856784401] [2023-04-01 23:05:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:09,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:10,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:10,137 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 23:05:10,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:10,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856784401] [2023-04-01 23:05:10,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856784401] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:05:10,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:05:10,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 23:05:10,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959510473] [2023-04-01 23:05:10,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:05:10,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 23:05:10,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:05:10,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 23:05:10,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 23:05:10,183 INFO L87 Difference]: Start difference. First operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 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 23:05:12,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:12,900 INFO L93 Difference]: Finished difference Result 1203 states and 2166 transitions. [2023-04-01 23:05:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:05:12,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 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 72 [2023-04-01 23:05:12,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:12,921 INFO L225 Difference]: With dead ends: 1203 [2023-04-01 23:05:12,922 INFO L226 Difference]: Without dead ends: 702 [2023-04-01 23:05:12,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:05:12,940 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 1005 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:12,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1005 Valid, 85 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 23:05:12,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2023-04-01 23:05:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 696. [2023-04-01 23:05:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 680 states have (on average 1.4676470588235293) internal successors, (998), 682 states have internal predecessors, (998), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 23:05:13,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1015 transitions. [2023-04-01 23:05:13,004 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1015 transitions. Word has length 72 [2023-04-01 23:05:13,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:13,004 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 1015 transitions. [2023-04-01 23:05:13,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 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 23:05:13,004 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1015 transitions. [2023-04-01 23:05:13,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-01 23:05:13,009 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:13,009 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, 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] [2023-04-01 23:05:13,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:05:13,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:13,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:13,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2069414031, now seen corresponding path program 1 times [2023-04-01 23:05:13,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:13,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389058601] [2023-04-01 23:05:13,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:13,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:13,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:13,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:05:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:05:13,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:13,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389058601] [2023-04-01 23:05:13,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389058601] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:05:13,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:05:13,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:05:13,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301398971] [2023-04-01 23:05:13,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:05:13,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:05:13,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:05:13,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:05:13,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:05:13,372 INFO L87 Difference]: Start difference. First operand 696 states and 1015 transitions. Second operand has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 4 states have internal predecessors, (145), 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 23:05:17,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:17,105 INFO L93 Difference]: Finished difference Result 2072 states and 3048 transitions. [2023-04-01 23:05:17,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:05:17,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 4 states have internal predecessors, (145), 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 151 [2023-04-01 23:05:17,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:17,110 INFO L225 Difference]: With dead ends: 2072 [2023-04-01 23:05:17,110 INFO L226 Difference]: Without dead ends: 1382 [2023-04-01 23:05:17,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:05:17,112 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1016 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3207 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 3462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 3207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:17,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 241 Invalid, 3462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 3207 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 23:05:17,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2023-04-01 23:05:17,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1359. [2023-04-01 23:05:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1323 states have (on average 1.3862433862433863) internal successors, (1834), 1334 states have internal predecessors, (1834), 10 states have call successors, (10), 10 states have call predecessors, (10), 25 states have return successors, (45), 14 states have call predecessors, (45), 9 states have call successors, (45) [2023-04-01 23:05:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1889 transitions. [2023-04-01 23:05:17,157 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1889 transitions. Word has length 151 [2023-04-01 23:05:17,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:17,159 INFO L495 AbstractCegarLoop]: Abstraction has 1359 states and 1889 transitions. [2023-04-01 23:05:17,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 4 states have internal predecessors, (145), 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 23:05:17,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1889 transitions. [2023-04-01 23:05:17,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-01 23:05:17,169 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:17,170 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, 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] [2023-04-01 23:05:17,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:05:17,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:17,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:17,171 INFO L85 PathProgramCache]: Analyzing trace with hash -385533689, now seen corresponding path program 1 times [2023-04-01 23:05:17,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:17,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134436553] [2023-04-01 23:05:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:17,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:17,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:17,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:05:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:05:17,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:17,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134436553] [2023-04-01 23:05:17,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134436553] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:05:17,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:05:17,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:05:17,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491202892] [2023-04-01 23:05:17,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:05:17,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:05:17,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:05:17,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:05:17,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:05:17,487 INFO L87 Difference]: Start difference. First operand 1359 states and 1889 transitions. Second operand has 7 states, 6 states have (on average 24.833333333333332) internal successors, (149), 4 states have internal predecessors, (149), 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 23:05:20,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:20,481 INFO L93 Difference]: Finished difference Result 4068 states and 5764 transitions. [2023-04-01 23:05:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:05:20,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 24.833333333333332) internal successors, (149), 4 states have internal predecessors, (149), 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 155 [2023-04-01 23:05:20,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:20,493 INFO L225 Difference]: With dead ends: 4068 [2023-04-01 23:05:20,493 INFO L226 Difference]: Without dead ends: 2715 [2023-04-01 23:05:20,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:05:20,502 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1274 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1274 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:20,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1274 Valid, 169 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 23:05:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2023-04-01 23:05:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 2338. [2023-04-01 23:05:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2265 states have (on average 1.2710816777041942) internal successors, (2879), 2298 states have internal predecessors, (2879), 16 states have call successors, (16), 16 states have call predecessors, (16), 56 states have return successors, (109), 23 states have call predecessors, (109), 15 states have call successors, (109) [2023-04-01 23:05:20,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 3004 transitions. [2023-04-01 23:05:20,568 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 3004 transitions. Word has length 155 [2023-04-01 23:05:20,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:20,568 INFO L495 AbstractCegarLoop]: Abstraction has 2338 states and 3004 transitions. [2023-04-01 23:05:20,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 24.833333333333332) internal successors, (149), 4 states have internal predecessors, (149), 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 23:05:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 3004 transitions. [2023-04-01 23:05:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-04-01 23:05:20,571 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:20,571 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, 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] [2023-04-01 23:05:20,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:05:20,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:20,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:20,572 INFO L85 PathProgramCache]: Analyzing trace with hash 963341582, now seen corresponding path program 1 times [2023-04-01 23:05:20,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:20,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226398204] [2023-04-01 23:05:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:20,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:20,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:20,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:05:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:05:20,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:20,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226398204] [2023-04-01 23:05:20,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226398204] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:05:20,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024965005] [2023-04-01 23:05:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:20,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:05:20,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:05:20,897 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 23:05:20,900 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 23:05:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:21,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:05:21,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:05:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:05:21,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:05:21,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024965005] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:05:21,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:05:21,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:05:21,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334084404] [2023-04-01 23:05:21,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:05:21,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:05:21,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:05:21,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:05:21,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:05:21,179 INFO L87 Difference]: Start difference. First operand 2338 states and 3004 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 23:05:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:22,499 INFO L93 Difference]: Finished difference Result 5930 states and 7878 transitions. [2023-04-01 23:05:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:05:22,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 272 [2023-04-01 23:05:22,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:22,514 INFO L225 Difference]: With dead ends: 5930 [2023-04-01 23:05:22,514 INFO L226 Difference]: Without dead ends: 3598 [2023-04-01 23:05:22,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:05:22,524 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 315 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:22,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 543 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 23:05:22,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2023-04-01 23:05:22,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 3597. [2023-04-01 23:05:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3597 states, 3497 states have (on average 1.2593651701458393) internal successors, (4404), 3538 states have internal predecessors, (4404), 24 states have call successors, (24), 24 states have call predecessors, (24), 75 states have return successors, (223), 34 states have call predecessors, (223), 23 states have call successors, (223) [2023-04-01 23:05:22,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 4651 transitions. [2023-04-01 23:05:22,617 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 4651 transitions. Word has length 272 [2023-04-01 23:05:22,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:22,618 INFO L495 AbstractCegarLoop]: Abstraction has 3597 states and 4651 transitions. [2023-04-01 23:05:22,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 23:05:22,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 4651 transitions. [2023-04-01 23:05:22,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2023-04-01 23:05:22,622 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:22,623 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:22,635 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 23:05:22,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:05:22,833 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:22,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:22,833 INFO L85 PathProgramCache]: Analyzing trace with hash -310362939, now seen corresponding path program 1 times [2023-04-01 23:05:22,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:22,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410422683] [2023-04-01 23:05:22,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:22,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:23,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:23,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:05:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 23:05:23,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:23,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410422683] [2023-04-01 23:05:23,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410422683] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:05:23,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754303931] [2023-04-01 23:05:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:23,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:05:23,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:05:23,518 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 23:05:23,521 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 23:05:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:23,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 23:05:23,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:05:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 23:05:24,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:05:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 23:05:24,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754303931] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 23:05:24,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:05:24,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-04-01 23:05:24,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575862995] [2023-04-01 23:05:24,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:05:24,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 23:05:24,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:05:24,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 23:05:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:05:24,907 INFO L87 Difference]: Start difference. First operand 3597 states and 4651 transitions. Second operand has 4 states, 4 states have (on average 84.5) internal successors, (338), 3 states have internal predecessors, (338), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:05:26,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:26,410 INFO L93 Difference]: Finished difference Result 9690 states and 12701 transitions. [2023-04-01 23:05:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 23:05:26,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.5) internal successors, (338), 3 states have internal predecessors, (338), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 346 [2023-04-01 23:05:26,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:26,429 INFO L225 Difference]: With dead ends: 9690 [2023-04-01 23:05:26,429 INFO L226 Difference]: Without dead ends: 6099 [2023-04-01 23:05:26,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:05:26,437 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 459 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:26,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 145 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 23:05:26,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6099 states. [2023-04-01 23:05:26,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6099 to 5485. [2023-04-01 23:05:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5485 states, 5341 states have (on average 1.219247331960307) internal successors, (6512), 5401 states have internal predecessors, (6512), 36 states have call successors, (36), 36 states have call predecessors, (36), 107 states have return successors, (370), 47 states have call predecessors, (370), 35 states have call successors, (370) [2023-04-01 23:05:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5485 states to 5485 states and 6918 transitions. [2023-04-01 23:05:26,538 INFO L78 Accepts]: Start accepts. Automaton has 5485 states and 6918 transitions. Word has length 346 [2023-04-01 23:05:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:26,538 INFO L495 AbstractCegarLoop]: Abstraction has 5485 states and 6918 transitions. [2023-04-01 23:05:26,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.5) internal successors, (338), 3 states have internal predecessors, (338), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:05:26,539 INFO L276 IsEmpty]: Start isEmpty. Operand 5485 states and 6918 transitions. [2023-04-01 23:05:26,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2023-04-01 23:05:26,542 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:26,542 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2023-04-01 23:05:26,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 23:05:26,747 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 23:05:26,748 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:26,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:26,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1492812658, now seen corresponding path program 1 times [2023-04-01 23:05:26,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:26,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110856740] [2023-04-01 23:05:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:26,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:26,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:26,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:05:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:27,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:05:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 212 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 23:05:27,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:27,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110856740] [2023-04-01 23:05:27,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110856740] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:05:27,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913724422] [2023-04-01 23:05:27,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:27,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:05:27,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:05:27,094 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 23:05:27,096 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 23:05:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:27,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:05:27,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:05:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:05:27,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:05:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:05:27,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913724422] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:05:27,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:05:27,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:05:27,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940391404] [2023-04-01 23:05:27,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:05:27,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:05:27,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:05:27,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:05:27,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:05:27,569 INFO L87 Difference]: Start difference. First operand 5485 states and 6918 transitions. Second operand has 12 states, 12 states have (on average 43.333333333333336) internal successors, (520), 10 states have internal predecessors, (520), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:05:31,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:31,511 INFO L93 Difference]: Finished difference Result 14824 states and 19010 transitions. [2023-04-01 23:05:31,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 23:05:31,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 43.333333333333336) internal successors, (520), 10 states have internal predecessors, (520), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 357 [2023-04-01 23:05:31,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:31,535 INFO L225 Difference]: With dead ends: 14824 [2023-04-01 23:05:31,536 INFO L226 Difference]: Without dead ends: 9345 [2023-04-01 23:05:31,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 718 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:05:31,544 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 2780 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 3615 mSolverCounterSat, 1158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2780 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 4773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1158 IncrementalHoareTripleChecker+Valid, 3615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:31,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2780 Valid, 261 Invalid, 4773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1158 Valid, 3615 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 23:05:31,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9345 states. [2023-04-01 23:05:31,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9345 to 8379. [2023-04-01 23:05:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8379 states, 8135 states have (on average 1.154517516902274) internal successors, (9392), 8253 states have internal predecessors, (9392), 54 states have call successors, (54), 54 states have call predecessors, (54), 189 states have return successors, (677), 71 states have call predecessors, (677), 53 states have call successors, (677) [2023-04-01 23:05:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8379 states to 8379 states and 10123 transitions. [2023-04-01 23:05:31,693 INFO L78 Accepts]: Start accepts. Automaton has 8379 states and 10123 transitions. Word has length 357 [2023-04-01 23:05:31,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:31,693 INFO L495 AbstractCegarLoop]: Abstraction has 8379 states and 10123 transitions. [2023-04-01 23:05:31,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 43.333333333333336) internal successors, (520), 10 states have internal predecessors, (520), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:05:31,694 INFO L276 IsEmpty]: Start isEmpty. Operand 8379 states and 10123 transitions. [2023-04-01 23:05:31,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-04-01 23:05:31,700 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:31,700 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:31,721 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 23:05:31,905 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 23:05:31,906 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:31,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:31,906 INFO L85 PathProgramCache]: Analyzing trace with hash -579452988, now seen corresponding path program 1 times [2023-04-01 23:05:31,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:31,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730401831] [2023-04-01 23:05:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:31,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:32,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:32,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:05:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:32,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:05:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:32,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2023-04-01 23:05:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 198 proven. 3 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2023-04-01 23:05:32,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:32,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730401831] [2023-04-01 23:05:32,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730401831] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:05:32,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648556834] [2023-04-01 23:05:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:32,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:05:32,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:05:32,274 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 23:05:32,276 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 23:05:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:32,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:05:32,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:05:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2023-04-01 23:05:32,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:05:32,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648556834] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:05:32,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:05:32,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:05:32,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339855245] [2023-04-01 23:05:32,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:05:32,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:05:32,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:05:32,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:05:32,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:05:32,495 INFO L87 Difference]: Start difference. First operand 8379 states and 10123 transitions. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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 23:05:33,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:33,974 INFO L93 Difference]: Finished difference Result 18612 states and 22799 transitions. [2023-04-01 23:05:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:05:33,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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 474 [2023-04-01 23:05:33,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:34,002 INFO L225 Difference]: With dead ends: 18612 [2023-04-01 23:05:34,003 INFO L226 Difference]: Without dead ends: 10239 [2023-04-01 23:05:34,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 481 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:05:34,017 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 357 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:34,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 488 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 23:05:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10239 states. [2023-04-01 23:05:34,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10239 to 10237. [2023-04-01 23:05:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10237 states, 9961 states have (on average 1.1458688886657966) internal successors, (11414), 10087 states have internal predecessors, (11414), 66 states have call successors, (66), 66 states have call predecessors, (66), 209 states have return successors, (868), 83 states have call predecessors, (868), 65 states have call successors, (868) [2023-04-01 23:05:34,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10237 states to 10237 states and 12348 transitions. [2023-04-01 23:05:34,185 INFO L78 Accepts]: Start accepts. Automaton has 10237 states and 12348 transitions. Word has length 474 [2023-04-01 23:05:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:34,186 INFO L495 AbstractCegarLoop]: Abstraction has 10237 states and 12348 transitions. [2023-04-01 23:05:34,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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 23:05:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 10237 states and 12348 transitions. [2023-04-01 23:05:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2023-04-01 23:05:34,206 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:34,207 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:34,214 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 23:05:34,412 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 23:05:34,412 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:34,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:34,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1669913098, now seen corresponding path program 1 times [2023-04-01 23:05:34,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:34,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974119398] [2023-04-01 23:05:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:34,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:35,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:35,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:05:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:35,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:05:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:35,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2023-04-01 23:05:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 128 proven. 339 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-04-01 23:05:35,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:35,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974119398] [2023-04-01 23:05:35,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974119398] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:05:35,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993362839] [2023-04-01 23:05:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:35,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:05:35,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:05:35,867 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 23:05:35,869 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 23:05:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:36,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 23:05:36,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:05:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2023-04-01 23:05:36,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:05:36,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993362839] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:05:36,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:05:36,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-01 23:05:36,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554510551] [2023-04-01 23:05:36,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:05:36,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:05:36,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:05:36,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:05:36,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:05:36,618 INFO L87 Difference]: Start difference. First operand 10237 states and 12348 transitions. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 4 states have internal predecessors, (353), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:05:38,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:38,894 INFO L93 Difference]: Finished difference Result 20885 states and 25288 transitions. [2023-04-01 23:05:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:05:38,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 4 states have internal predecessors, (353), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 548 [2023-04-01 23:05:38,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:38,923 INFO L225 Difference]: With dead ends: 20885 [2023-04-01 23:05:38,923 INFO L226 Difference]: Without dead ends: 10654 [2023-04-01 23:05:38,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:05:38,940 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 601 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:38,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 177 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 23:05:38,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10654 states. [2023-04-01 23:05:39,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10654 to 10576. [2023-04-01 23:05:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10576 states, 10279 states have (on average 1.141842591691799) internal successors, (11737), 10422 states have internal predecessors, (11737), 68 states have call successors, (68), 68 states have call predecessors, (68), 228 states have return successors, (934), 85 states have call predecessors, (934), 67 states have call successors, (934) [2023-04-01 23:05:39,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10576 states to 10576 states and 12739 transitions. [2023-04-01 23:05:39,105 INFO L78 Accepts]: Start accepts. Automaton has 10576 states and 12739 transitions. Word has length 548 [2023-04-01 23:05:39,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:39,105 INFO L495 AbstractCegarLoop]: Abstraction has 10576 states and 12739 transitions. [2023-04-01 23:05:39,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 4 states have internal predecessors, (353), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:05:39,105 INFO L276 IsEmpty]: Start isEmpty. Operand 10576 states and 12739 transitions. [2023-04-01 23:05:39,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2023-04-01 23:05:39,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:39,119 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:39,124 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 23:05:39,324 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 23:05:39,324 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:39,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:39,325 INFO L85 PathProgramCache]: Analyzing trace with hash 922536841, now seen corresponding path program 1 times [2023-04-01 23:05:39,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:39,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564997240] [2023-04-01 23:05:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:39,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:39,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:39,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:05:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:39,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:05:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:39,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2023-04-01 23:05:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 320 proven. 123 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-04-01 23:05:39,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:39,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564997240] [2023-04-01 23:05:39,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564997240] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:05:39,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347925380] [2023-04-01 23:05:39,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:39,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:05:39,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:05:39,850 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 23:05:39,852 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 23:05:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:40,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:05:40,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:05:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 525 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 23:05:40,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:05:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 321 proven. 124 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-04-01 23:05:40,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347925380] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:05:40,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:05:40,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:05:40,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874284371] [2023-04-01 23:05:40,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:05:40,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:05:40,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:05:40,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:05:40,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:05:40,433 INFO L87 Difference]: Start difference. First operand 10576 states and 12739 transitions. Second operand has 11 states, 11 states have (on average 73.45454545454545) internal successors, (808), 9 states have internal predecessors, (808), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:05:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:43,560 INFO L93 Difference]: Finished difference Result 20924 states and 25396 transitions. [2023-04-01 23:05:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 23:05:43,560 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 73.45454545454545) internal successors, (808), 9 states have internal predecessors, (808), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 634 [2023-04-01 23:05:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:43,588 INFO L225 Difference]: With dead ends: 20924 [2023-04-01 23:05:43,588 INFO L226 Difference]: Without dead ends: 10661 [2023-04-01 23:05:43,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1309 GetRequests, 1283 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:05:43,605 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 2611 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 3204 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2611 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 3787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 3204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:43,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2611 Valid, 278 Invalid, 3787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 3204 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 23:05:43,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10661 states. [2023-04-01 23:05:43,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10661 to 10623. [2023-04-01 23:05:43,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10623 states, 10304 states have (on average 1.123350155279503) internal successors, (11575), 10468 states have internal predecessors, (11575), 68 states have call successors, (68), 68 states have call predecessors, (68), 250 states have return successors, (917), 86 states have call predecessors, (917), 67 states have call successors, (917) [2023-04-01 23:05:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10623 states to 10623 states and 12560 transitions. [2023-04-01 23:05:43,760 INFO L78 Accepts]: Start accepts. Automaton has 10623 states and 12560 transitions. Word has length 634 [2023-04-01 23:05:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:43,760 INFO L495 AbstractCegarLoop]: Abstraction has 10623 states and 12560 transitions. [2023-04-01 23:05:43,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 73.45454545454545) internal successors, (808), 9 states have internal predecessors, (808), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:05:43,761 INFO L276 IsEmpty]: Start isEmpty. Operand 10623 states and 12560 transitions. [2023-04-01 23:05:43,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2023-04-01 23:05:43,769 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:43,770 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:43,778 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 23:05:43,976 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 23:05:43,976 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:43,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:43,976 INFO L85 PathProgramCache]: Analyzing trace with hash -89357415, now seen corresponding path program 1 times [2023-04-01 23:05:43,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:43,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698646719] [2023-04-01 23:05:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:43,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:44,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:44,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:05:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:44,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-04-01 23:05:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:44,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2023-04-01 23:05:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:44,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 429 [2023-04-01 23:05:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 486 proven. 123 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2023-04-01 23:05:44,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:44,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698646719] [2023-04-01 23:05:44,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698646719] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:05:44,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626613751] [2023-04-01 23:05:44,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:44,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:05:44,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:05:44,614 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 23:05:44,617 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 23:05:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:44,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 23:05:44,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:05:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 646 proven. 41 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2023-04-01 23:05:45,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:05:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 272 proven. 539 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-04-01 23:05:47,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626613751] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:05:47,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:05:47,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2023-04-01 23:05:47,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253473641] [2023-04-01 23:05:47,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:05:47,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 23:05:47,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:05:47,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 23:05:47,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-04-01 23:05:47,554 INFO L87 Difference]: Start difference. First operand 10623 states and 12560 transitions. Second operand has 19 states, 19 states have (on average 48.73684210526316) internal successors, (926), 17 states have internal predecessors, (926), 7 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 23:05:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:55,959 INFO L93 Difference]: Finished difference Result 34589 states and 42104 transitions. [2023-04-01 23:05:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-04-01 23:05:55,959 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 48.73684210526316) internal successors, (926), 17 states have internal predecessors, (926), 7 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 643 [2023-04-01 23:05:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:56,009 INFO L225 Difference]: With dead ends: 34589 [2023-04-01 23:05:56,009 INFO L226 Difference]: Without dead ends: 23581 [2023-04-01 23:05:56,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1418 GetRequests, 1339 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1296, Invalid=5024, Unknown=0, NotChecked=0, Total=6320 [2023-04-01 23:05:56,029 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 7974 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 6042 mSolverCounterSat, 3407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7982 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 9449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3407 IncrementalHoareTripleChecker+Valid, 6042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:56,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7982 Valid, 382 Invalid, 9449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3407 Valid, 6042 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-04-01 23:05:56,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23581 states. [2023-04-01 23:05:56,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23581 to 20987. [2023-04-01 23:05:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20987 states, 20433 states have (on average 1.1067390985171046) internal successors, (22614), 20694 states have internal predecessors, (22614), 134 states have call successors, (134), 134 states have call predecessors, (134), 419 states have return successors, (2263), 158 states have call predecessors, (2263), 133 states have call successors, (2263) [2023-04-01 23:05:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20987 states to 20987 states and 25011 transitions. [2023-04-01 23:05:56,397 INFO L78 Accepts]: Start accepts. Automaton has 20987 states and 25011 transitions. Word has length 643 [2023-04-01 23:05:56,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:56,397 INFO L495 AbstractCegarLoop]: Abstraction has 20987 states and 25011 transitions. [2023-04-01 23:05:56,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 48.73684210526316) internal successors, (926), 17 states have internal predecessors, (926), 7 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 23:05:56,398 INFO L276 IsEmpty]: Start isEmpty. Operand 20987 states and 25011 transitions. [2023-04-01 23:05:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-04-01 23:05:56,411 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:56,412 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:56,418 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 23:05:56,618 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 23:05:56,618 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:56,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:56,619 INFO L85 PathProgramCache]: Analyzing trace with hash -208424654, now seen corresponding path program 1 times [2023-04-01 23:05:56,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:56,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222028070] [2023-04-01 23:05:56,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:56,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:56,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:56,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:05:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:56,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:05:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:56,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 23:05:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:57,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 521 [2023-04-01 23:05:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 274 proven. 2 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2023-04-01 23:05:57,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:57,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222028070] [2023-04-01 23:05:57,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222028070] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:05:57,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084192076] [2023-04-01 23:05:57,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:57,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:05:57,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:05:57,060 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 23:05:57,063 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 23:05:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:57,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 23:05:57,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:05:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 498 proven. 0 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2023-04-01 23:05:57,258 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:05:57,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084192076] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:05:57,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:05:57,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:05:57,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412951184] [2023-04-01 23:05:57,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:05:57,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:05:57,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:05:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:05:57,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:05:57,260 INFO L87 Difference]: Start difference. First operand 20987 states and 25011 transitions. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:05:58,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:58,378 INFO L93 Difference]: Finished difference Result 41963 states and 50038 transitions. [2023-04-01 23:05:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:05:58,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 685 [2023-04-01 23:05:58,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:58,424 INFO L225 Difference]: With dead ends: 41963 [2023-04-01 23:05:58,425 INFO L226 Difference]: Without dead ends: 21289 [2023-04-01 23:05:58,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 695 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:05:58,450 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 477 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:58,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 92 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 23:05:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21289 states. [2023-04-01 23:05:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21289 to 20980. [2023-04-01 23:05:58,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20980 states, 20427 states have (on average 1.1065256768003133) internal successors, (22603), 20687 states have internal predecessors, (22603), 134 states have call successors, (134), 134 states have call predecessors, (134), 418 states have return successors, (2257), 158 states have call predecessors, (2257), 133 states have call successors, (2257) [2023-04-01 23:05:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20980 states to 20980 states and 24994 transitions. [2023-04-01 23:05:58,886 INFO L78 Accepts]: Start accepts. Automaton has 20980 states and 24994 transitions. Word has length 685 [2023-04-01 23:05:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:58,886 INFO L495 AbstractCegarLoop]: Abstraction has 20980 states and 24994 transitions. [2023-04-01 23:05:58,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:05:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 20980 states and 24994 transitions. [2023-04-01 23:05:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 710 [2023-04-01 23:05:58,901 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:58,902 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, 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, 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, 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, 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, 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] [2023-04-01 23:05:58,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 23:05:59,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 23:05:59,107 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:59,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:59,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1308327539, now seen corresponding path program 1 times [2023-04-01 23:05:59,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:59,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324707962] [2023-04-01 23:05:59,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:59,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:59,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:59,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:05:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:59,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:05:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:59,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 23:05:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 557 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 23:05:59,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:59,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324707962] [2023-04-01 23:05:59,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324707962] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:05:59,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293856799] [2023-04-01 23:05:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:59,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:05:59,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:05:59,880 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:05:59,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 23:06:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:00,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:06:00,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:06:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2023-04-01 23:06:00,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:06:00,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293856799] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:06:00,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:06:00,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 23:06:00,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050497786] [2023-04-01 23:06:00,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:06:00,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:06:00,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:06:00,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:06:00,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:06:00,207 INFO L87 Difference]: Start difference. First operand 20980 states and 24994 transitions. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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 23:06:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:06:01,841 INFO L93 Difference]: Finished difference Result 49984 states and 59864 transitions. [2023-04-01 23:06:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:06:01,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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 709 [2023-04-01 23:06:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:06:01,902 INFO L225 Difference]: With dead ends: 49984 [2023-04-01 23:06:01,902 INFO L226 Difference]: Without dead ends: 29317 [2023-04-01 23:06:01,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:06:01,920 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 285 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:06:01,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 543 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 23:06:01,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29317 states. [2023-04-01 23:06:02,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29317 to 28072. [2023-04-01 23:06:02,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28072 states, 27411 states have (on average 1.0993396811499032) internal successors, (30134), 27687 states have internal predecessors, (30134), 180 states have call successors, (180), 180 states have call predecessors, (180), 480 states have return successors, (2908), 204 states have call predecessors, (2908), 179 states have call successors, (2908) [2023-04-01 23:06:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28072 states to 28072 states and 33222 transitions. [2023-04-01 23:06:02,318 INFO L78 Accepts]: Start accepts. Automaton has 28072 states and 33222 transitions. Word has length 709 [2023-04-01 23:06:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:06:02,319 INFO L495 AbstractCegarLoop]: Abstraction has 28072 states and 33222 transitions. [2023-04-01 23:06:02,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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 23:06:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 28072 states and 33222 transitions. [2023-04-01 23:06:02,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2023-04-01 23:06:02,343 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:06:02,343 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, 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, 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, 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, 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, 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] [2023-04-01 23:06:02,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 23:06:02,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:02,551 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:06:02,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:06:02,552 INFO L85 PathProgramCache]: Analyzing trace with hash 424899279, now seen corresponding path program 1 times [2023-04-01 23:06:02,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:06:02,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162826685] [2023-04-01 23:06:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:02,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:06:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:03,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:06:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:03,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:06:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:03,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:06:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:03,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 23:06:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:03,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:06:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 198 proven. 3 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2023-04-01 23:06:03,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:06:03,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162826685] [2023-04-01 23:06:03,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162826685] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:06:03,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516929812] [2023-04-01 23:06:03,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:03,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:03,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:06:03,326 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:06:03,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 23:06:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:03,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 23:06:03,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:06:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 515 proven. 68 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 23:06:04,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:06:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2023-04-01 23:06:04,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516929812] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 23:06:04,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:06:04,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 6] total 10 [2023-04-01 23:06:04,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245738253] [2023-04-01 23:06:04,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:06:04,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:06:04,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:06:04,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:06:04,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:06:04,995 INFO L87 Difference]: Start difference. First operand 28072 states and 33222 transitions. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 23:06:06,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:06:06,406 INFO L93 Difference]: Finished difference Result 57062 states and 67446 transitions. [2023-04-01 23:06:06,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:06:06,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 754 [2023-04-01 23:06:06,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:06:06,465 INFO L225 Difference]: With dead ends: 57062 [2023-04-01 23:06:06,466 INFO L226 Difference]: Without dead ends: 29303 [2023-04-01 23:06:06,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1523 GetRequests, 1514 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:06:06,495 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 257 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:06:06,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 650 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 23:06:06,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29303 states. [2023-04-01 23:06:06,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29303 to 28366. [2023-04-01 23:06:06,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28366 states, 27706 states have (on average 1.0973074424312423) internal successors, (30402), 27978 states have internal predecessors, (30402), 182 states have call successors, (182), 182 states have call predecessors, (182), 477 states have return successors, (2877), 205 states have call predecessors, (2877), 181 states have call successors, (2877) [2023-04-01 23:06:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28366 states to 28366 states and 33461 transitions. [2023-04-01 23:06:06,913 INFO L78 Accepts]: Start accepts. Automaton has 28366 states and 33461 transitions. Word has length 754 [2023-04-01 23:06:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:06:06,913 INFO L495 AbstractCegarLoop]: Abstraction has 28366 states and 33461 transitions. [2023-04-01 23:06:06,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 23:06:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 28366 states and 33461 transitions. [2023-04-01 23:06:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2023-04-01 23:06:06,940 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:06:06,940 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2023-04-01 23:06:06,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-04-01 23:06:07,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 23:06:07,146 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:06:07,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:06:07,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1619751661, now seen corresponding path program 1 times [2023-04-01 23:06:07,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:06:07,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953502284] [2023-04-01 23:06:07,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:07,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:06:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:07,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:06:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:07,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:06:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:07,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:06:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:07,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 23:06:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:07,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 567 [2023-04-01 23:06:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 678 proven. 2 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-04-01 23:06:08,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:06:08,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953502284] [2023-04-01 23:06:08,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953502284] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:06:08,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750112222] [2023-04-01 23:06:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:08,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:08,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:06:08,030 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:06:08,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 23:06:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:08,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:06:08,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:06:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2023-04-01 23:06:09,393 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:06:09,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750112222] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:06:09,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:06:09,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 23:06:09,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496067706] [2023-04-01 23:06:09,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:06:09,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:06:09,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:06:09,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:06:09,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:06:09,395 INFO L87 Difference]: Start difference. First operand 28366 states and 33461 transitions. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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 23:06:15,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:06:17,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:06:23,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:06:27,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:06:27,776 INFO L93 Difference]: Finished difference Result 67872 states and 79963 transitions. [2023-04-01 23:06:27,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:06:27,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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 784 [2023-04-01 23:06:27,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:06:27,844 INFO L225 Difference]: With dead ends: 67872 [2023-04-01 23:06:27,844 INFO L226 Difference]: Without dead ends: 33255 [2023-04-01 23:06:27,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 792 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:06:27,885 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 272 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 182 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:06:27,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 671 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 851 Invalid, 16 Unknown, 0 Unchecked, 18.0s Time] [2023-04-01 23:06:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33255 states. [2023-04-01 23:06:28,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33255 to 30483. [2023-04-01 23:06:28,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30483 states, 29813 states have (on average 1.0806695065910845) internal successors, (32218), 30076 states have internal predecessors, (32218), 196 states have call successors, (196), 196 states have call predecessors, (196), 473 states have return successors, (2577), 210 states have call predecessors, (2577), 195 states have call successors, (2577) [2023-04-01 23:06:28,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30483 states to 30483 states and 34991 transitions. [2023-04-01 23:06:28,395 INFO L78 Accepts]: Start accepts. Automaton has 30483 states and 34991 transitions. Word has length 784 [2023-04-01 23:06:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:06:28,395 INFO L495 AbstractCegarLoop]: Abstraction has 30483 states and 34991 transitions. [2023-04-01 23:06:28,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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 23:06:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 30483 states and 34991 transitions. [2023-04-01 23:06:28,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2023-04-01 23:06:28,418 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:06:28,419 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:28,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 23:06:28,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 23:06:28,624 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:06:28,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:06:28,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1653636509, now seen corresponding path program 1 times [2023-04-01 23:06:28,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:06:28,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750422883] [2023-04-01 23:06:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:28,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:06:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:29,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:06:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:29,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:06:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:29,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:06:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:29,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 23:06:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:29,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 469 [2023-04-01 23:06:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:29,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 595 [2023-04-01 23:06:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1360 backedges. 492 proven. 148 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2023-04-01 23:06:29,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:06:29,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750422883] [2023-04-01 23:06:29,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750422883] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:06:29,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773923111] [2023-04-01 23:06:29,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:29,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:29,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:06:29,348 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:06:29,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 23:06:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:29,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:06:29,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:06:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1360 backedges. 994 proven. 2 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-04-01 23:06:32,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:06:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1360 backedges. 494 proven. 150 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2023-04-01 23:06:35,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773923111] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:06:35,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:06:35,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2023-04-01 23:06:35,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307594052] [2023-04-01 23:06:35,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:06:35,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 23:06:35,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:06:35,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 23:06:35,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:06:35,719 INFO L87 Difference]: Start difference. First operand 30483 states and 34991 transitions. Second operand has 10 states, 10 states have (on average 65.5) internal successors, (655), 8 states have internal predecessors, (655), 4 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:06:39,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:06:39,425 INFO L93 Difference]: Finished difference Result 72429 states and 83346 transitions. [2023-04-01 23:06:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 23:06:39,426 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 65.5) internal successors, (655), 8 states have internal predecessors, (655), 4 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 809 [2023-04-01 23:06:39,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:06:39,494 INFO L225 Difference]: With dead ends: 72429 [2023-04-01 23:06:39,494 INFO L226 Difference]: Without dead ends: 42259 [2023-04-01 23:06:39,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1653 GetRequests, 1633 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-04-01 23:06:39,512 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 1478 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 3235 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 3580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 3235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:06:39,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1478 Valid, 260 Invalid, 3580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 3235 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 23:06:39,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42259 states. [2023-04-01 23:06:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42259 to 36686. [2023-04-01 23:06:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36686 states, 35908 states have (on average 1.071905981953882) internal successors, (38490), 36198 states have internal predecessors, (38490), 236 states have call successors, (236), 236 states have call predecessors, (236), 541 states have return successors, (2847), 251 states have call predecessors, (2847), 235 states have call successors, (2847) [2023-04-01 23:06:40,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36686 states to 36686 states and 41573 transitions. [2023-04-01 23:06:40,041 INFO L78 Accepts]: Start accepts. Automaton has 36686 states and 41573 transitions. Word has length 809 [2023-04-01 23:06:40,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:06:40,042 INFO L495 AbstractCegarLoop]: Abstraction has 36686 states and 41573 transitions. [2023-04-01 23:06:40,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.5) internal successors, (655), 8 states have internal predecessors, (655), 4 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:06:40,042 INFO L276 IsEmpty]: Start isEmpty. Operand 36686 states and 41573 transitions. [2023-04-01 23:06:40,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2023-04-01 23:06:40,063 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:06:40,065 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2023-04-01 23:06:40,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 23:06:40,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 23:06:40,271 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:06:40,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:06:40,271 INFO L85 PathProgramCache]: Analyzing trace with hash 172766121, now seen corresponding path program 1 times [2023-04-01 23:06:40,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:06:40,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274456909] [2023-04-01 23:06:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:40,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:06:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:40,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:06:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:40,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:06:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:40,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:06:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:40,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 487 [2023-04-01 23:06:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:40,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 613 [2023-04-01 23:06:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 515 proven. 123 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-04-01 23:06:40,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:06:40,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274456909] [2023-04-01 23:06:40,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274456909] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:06:40,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867038686] [2023-04-01 23:06:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:40,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:40,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:06:40,926 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:06:40,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 23:06:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:41,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:06:41,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:06:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 867 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2023-04-01 23:06:41,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:06:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 517 proven. 124 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-01 23:06:41,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867038686] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:06:41,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:06:41,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:06:41,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610306085] [2023-04-01 23:06:41,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:06:41,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:06:41,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:06:41,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:06:41,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:06:41,547 INFO L87 Difference]: Start difference. First operand 36686 states and 41573 transitions. Second operand has 11 states, 11 states have (on average 73.63636363636364) internal successors, (810), 9 states have internal predecessors, (810), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:06:44,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:06:44,690 INFO L93 Difference]: Finished difference Result 73097 states and 82981 transitions. [2023-04-01 23:06:44,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 23:06:44,691 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 73.63636363636364) internal successors, (810), 9 states have internal predecessors, (810), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 827 [2023-04-01 23:06:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:06:44,756 INFO L225 Difference]: With dead ends: 73097 [2023-04-01 23:06:44,757 INFO L226 Difference]: Without dead ends: 36724 [2023-04-01 23:06:44,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1697 GetRequests, 1671 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:06:44,797 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1675 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 2921 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 2921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:06:44,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1677 Valid, 234 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 2921 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 23:06:44,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36724 states. [2023-04-01 23:06:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36724 to 36363. [2023-04-01 23:06:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36363 states, 35593 states have (on average 1.055741297446127) internal successors, (37577), 35879 states have internal predecessors, (37577), 234 states have call successors, (234), 234 states have call predecessors, (234), 535 states have return successors, (2182), 249 states have call predecessors, (2182), 233 states have call successors, (2182) [2023-04-01 23:06:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36363 states to 36363 states and 39993 transitions. [2023-04-01 23:06:45,385 INFO L78 Accepts]: Start accepts. Automaton has 36363 states and 39993 transitions. Word has length 827 [2023-04-01 23:06:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:06:45,385 INFO L495 AbstractCegarLoop]: Abstraction has 36363 states and 39993 transitions. [2023-04-01 23:06:45,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 73.63636363636364) internal successors, (810), 9 states have internal predecessors, (810), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:06:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 36363 states and 39993 transitions. [2023-04-01 23:06:45,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 874 [2023-04-01 23:06:45,407 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:06:45,408 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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] [2023-04-01 23:06:45,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 23:06:45,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-01 23:06:45,613 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:06:45,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:06:45,614 INFO L85 PathProgramCache]: Analyzing trace with hash 533023777, now seen corresponding path program 1 times [2023-04-01 23:06:45,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:06:45,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011100603] [2023-04-01 23:06:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:45,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:06:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:46,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:06:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:46,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:06:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:46,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:06:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:46,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 533 [2023-04-01 23:06:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:46,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 659 [2023-04-01 23:06:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 685 proven. 2 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-04-01 23:06:46,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:06:46,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011100603] [2023-04-01 23:06:46,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011100603] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:06:46,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786844355] [2023-04-01 23:06:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:46,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:46,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:06:46,414 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:06:46,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 23:06:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:46,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:06:46,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:06:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 914 trivial. 0 not checked. [2023-04-01 23:06:46,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:06:46,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786844355] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:06:46,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:06:46,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 23:06:46,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861231475] [2023-04-01 23:06:46,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:06:46,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:06:46,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:06:46,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:06:46,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:06:46,717 INFO L87 Difference]: Start difference. First operand 36363 states and 39993 transitions. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 23:06:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:06:48,280 INFO L93 Difference]: Finished difference Result 81699 states and 89941 transitions. [2023-04-01 23:06:48,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:06:48,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 873 [2023-04-01 23:06:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:06:48,343 INFO L225 Difference]: With dead ends: 81699 [2023-04-01 23:06:48,343 INFO L226 Difference]: Without dead ends: 40042 [2023-04-01 23:06:48,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 887 GetRequests, 881 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:06:48,370 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 281 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:06:48,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 595 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 23:06:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40042 states. [2023-04-01 23:06:48,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40042 to 38505. [2023-04-01 23:06:48,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38505 states, 37717 states have (on average 1.0465307421056818) internal successors, (39472), 37998 states have internal predecessors, (39472), 248 states have call successors, (248), 248 states have call predecessors, (248), 539 states have return successors, (1999), 258 states have call predecessors, (1999), 247 states have call successors, (1999) [2023-04-01 23:06:48,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38505 states to 38505 states and 41719 transitions. [2023-04-01 23:06:48,895 INFO L78 Accepts]: Start accepts. Automaton has 38505 states and 41719 transitions. Word has length 873 [2023-04-01 23:06:48,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:06:48,895 INFO L495 AbstractCegarLoop]: Abstraction has 38505 states and 41719 transitions. [2023-04-01 23:06:48,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 23:06:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 38505 states and 41719 transitions. [2023-04-01 23:06:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 985 [2023-04-01 23:06:48,934 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:06:48,935 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:06:48,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-01 23:06:49,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:49,141 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:06:49,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:06:49,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1286799103, now seen corresponding path program 1 times [2023-04-01 23:06:49,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:06:49,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823730021] [2023-04-01 23:06:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:49,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:06:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:49,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:06:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:49,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:06:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:49,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:06:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:49,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 23:06:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:49,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 648 [2023-04-01 23:06:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 897 proven. 2 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2023-04-01 23:06:50,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:06:50,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823730021] [2023-04-01 23:06:50,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823730021] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:06:50,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301177241] [2023-04-01 23:06:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:50,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:50,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:06:50,195 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:06:50,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 23:06:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:50,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:06:50,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:06:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 900 proven. 2 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2023-04-01 23:06:50,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:06:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 900 proven. 2 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2023-04-01 23:06:51,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301177241] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:06:51,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:06:51,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2023-04-01 23:06:51,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883494816] [2023-04-01 23:06:51,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:06:51,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:06:51,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:06:51,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:06:51,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:06:51,565 INFO L87 Difference]: Start difference. First operand 38505 states and 41719 transitions. Second operand has 12 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 10 states have internal predecessors, (1157), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:06:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:06:55,473 INFO L93 Difference]: Finished difference Result 87230 states and 94581 transitions. [2023-04-01 23:06:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 23:06:55,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 10 states have internal predecessors, (1157), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 984 [2023-04-01 23:06:55,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:06:55,568 INFO L225 Difference]: With dead ends: 87230 [2023-04-01 23:06:55,568 INFO L226 Difference]: Without dead ends: 49038 [2023-04-01 23:06:55,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2008 GetRequests, 1983 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2023-04-01 23:06:55,608 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2546 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 3299 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2546 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 3741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 3299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:06:55,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2546 Valid, 256 Invalid, 3741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 3299 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 23:06:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49038 states. [2023-04-01 23:06:56,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49038 to 43160. [2023-04-01 23:06:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43160 states, 42290 states have (on average 1.045708205249468) internal successors, (44223), 42591 states have internal predecessors, (44223), 278 states have call successors, (278), 278 states have call predecessors, (278), 591 states have return successors, (2202), 290 states have call predecessors, (2202), 277 states have call successors, (2202) [2023-04-01 23:06:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43160 states to 43160 states and 46703 transitions. [2023-04-01 23:06:56,340 INFO L78 Accepts]: Start accepts. Automaton has 43160 states and 46703 transitions. Word has length 984 [2023-04-01 23:06:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:06:56,340 INFO L495 AbstractCegarLoop]: Abstraction has 43160 states and 46703 transitions. [2023-04-01 23:06:56,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 10 states have internal predecessors, (1157), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:06:56,341 INFO L276 IsEmpty]: Start isEmpty. Operand 43160 states and 46703 transitions. [2023-04-01 23:06:56,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 996 [2023-04-01 23:06:56,377 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:06:56,378 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:06:56,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-01 23:06:56,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 23:06:56,583 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:06:56,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:06:56,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1709890806, now seen corresponding path program 1 times [2023-04-01 23:06:56,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:06:56,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922317520] [2023-04-01 23:06:56,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:56,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:06:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:57,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:06:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:57,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:06:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:57,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:06:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:57,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 533 [2023-04-01 23:06:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:57,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 659 [2023-04-01 23:06:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 908 proven. 2 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-04-01 23:06:57,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:06:57,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922317520] [2023-04-01 23:06:57,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922317520] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:06:57,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993657260] [2023-04-01 23:06:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:06:57,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:06:57,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:06:57,429 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:06:57,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-01 23:06:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:06:57,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:06:57,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:06:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 911 proven. 2 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2023-04-01 23:06:57,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:06:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 911 proven. 2 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2023-04-01 23:06:58,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993657260] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:06:58,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:06:58,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2023-04-01 23:06:58,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584434103] [2023-04-01 23:06:58,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:06:58,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 23:06:58,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:06:58,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 23:06:58,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:06:58,580 INFO L87 Difference]: Start difference. First operand 43160 states and 46703 transitions. Second operand has 9 states, 9 states have (on average 127.77777777777777) internal successors, (1150), 7 states have internal predecessors, (1150), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:07:01,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:07:01,144 INFO L93 Difference]: Finished difference Result 91255 states and 98757 transitions. [2023-04-01 23:07:01,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 23:07:01,145 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 127.77777777777777) internal successors, (1150), 7 states have internal predecessors, (1150), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 995 [2023-04-01 23:07:01,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:07:01,233 INFO L225 Difference]: With dead ends: 91255 [2023-04-01 23:07:01,233 INFO L226 Difference]: Without dead ends: 48408 [2023-04-01 23:07:01,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2015 GetRequests, 1998 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:07:01,279 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 844 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2560 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 2850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 2560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:07:01,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 194 Invalid, 2850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 2560 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 23:07:01,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48408 states. [2023-04-01 23:07:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48408 to 47162. [2023-04-01 23:07:01,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47162 states, 46234 states have (on average 1.040684344854436) internal successors, (48115), 46541 states have internal predecessors, (48115), 304 states have call successors, (304), 304 states have call predecessors, (304), 623 states have return successors, (2201), 316 states have call predecessors, (2201), 303 states have call successors, (2201) [2023-04-01 23:07:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47162 states to 47162 states and 50620 transitions. [2023-04-01 23:07:01,965 INFO L78 Accepts]: Start accepts. Automaton has 47162 states and 50620 transitions. Word has length 995 [2023-04-01 23:07:01,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:07:01,965 INFO L495 AbstractCegarLoop]: Abstraction has 47162 states and 50620 transitions. [2023-04-01 23:07:01,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 127.77777777777777) internal successors, (1150), 7 states have internal predecessors, (1150), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:07:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 47162 states and 50620 transitions. [2023-04-01 23:07:02,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1021 [2023-04-01 23:07:02,006 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:07:02,006 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:07:02,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-01 23:07:02,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:07:02,209 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:07:02,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:07:02,209 INFO L85 PathProgramCache]: Analyzing trace with hash 349471195, now seen corresponding path program 1 times [2023-04-01 23:07:02,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:07:02,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217133246] [2023-04-01 23:07:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:02,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:07:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:02,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:07:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:02,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:07:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:02,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:07:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:02,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2023-04-01 23:07:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:03,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 684 [2023-04-01 23:07:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 935 proven. 2 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2023-04-01 23:07:03,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:07:03,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217133246] [2023-04-01 23:07:03,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217133246] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:07:03,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279615601] [2023-04-01 23:07:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:07:03,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:07:03,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:07:03,259 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:07:03,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-01 23:07:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:07:03,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 23:07:03,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:07:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 876 proven. 64 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2023-04-01 23:07:04,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:07:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 938 proven. 2 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2023-04-01 23:07:04,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279615601] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:07:04,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:07:04,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2023-04-01 23:07:04,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479485611] [2023-04-01 23:07:04,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:07:04,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 23:07:04,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:07:04,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 23:07:04,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:07:04,868 INFO L87 Difference]: Start difference. First operand 47162 states and 50620 transitions. Second operand has 15 states, 15 states have (on average 86.0) internal successors, (1290), 13 states have internal predecessors, (1290), 7 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:07:13,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:07:13,745 INFO L93 Difference]: Finished difference Result 118217 states and 126559 transitions. [2023-04-01 23:07:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-04-01 23:07:13,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 86.0) internal successors, (1290), 13 states have internal predecessors, (1290), 7 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 1020 [2023-04-01 23:07:13,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:07:13,748 INFO L225 Difference]: With dead ends: 118217 [2023-04-01 23:07:13,748 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 23:07:13,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2161 GetRequests, 2092 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=953, Invalid=4017, Unknown=0, NotChecked=0, Total=4970 [2023-04-01 23:07:13,809 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 5758 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 8328 mSolverCounterSat, 1343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5758 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 9671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1343 IncrementalHoareTripleChecker+Valid, 8328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:07:13,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5758 Valid, 489 Invalid, 9671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1343 Valid, 8328 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-04-01 23:07:13,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 23:07:13,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 23:07:13,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 23:07:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 23:07:13,811 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1020 [2023-04-01 23:07:13,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:07:13,811 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 23:07:13,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 86.0) internal successors, (1290), 13 states have internal predecessors, (1290), 7 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:07:13,811 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 23:07:13,811 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 23:07:13,813 INFO L805 garLoopResultBuilder]: Registering result SAFE for location calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 23:07:13,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-04-01 23:07:14,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:07:14,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.