/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:45:05,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:45:05,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:45:05,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:45:05,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:45:05,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:45:05,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:45:05,524 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 22:45:05,541 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:45:05,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:45:05,542 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:45:05,542 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:45:05,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:45:05,543 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:45:05,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:45:05,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:45:05,544 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:45:05,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:45:05,544 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:45:05,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:45:05,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:45:05,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:45:05,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:45:05,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:45:05,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:45:05,546 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:45:05,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:45:05,546 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:45:05,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:45:05,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:45:05,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:45:05,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:45:05,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:45:05,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:45:05,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:45:05,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:45:05,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:45:05,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:45:05,548 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:45:05,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:45:05,548 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:45:05,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:45:05,548 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:45:05,548 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:45:05,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:45:05,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:45:05,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:45:05,751 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:45:05,751 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:45:05,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label24.c [2023-03-30 22:45:06,896 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:45:07,277 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:45:07,281 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label24.c [2023-03-30 22:45:07,303 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/333c830af/db2ad99f0bf243c492bd1b48afd97483/FLAG6e15f93de [2023-03-30 22:45:07,315 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/333c830af/db2ad99f0bf243c492bd1b48afd97483 [2023-03-30 22:45:07,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:45:07,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:45:07,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:45:07,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:45:07,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:45:07,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:45:07" (1/1) ... [2023-03-30 22:45:07,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12ed1591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:07, skipping insertion in model container [2023-03-30 22:45:07,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:45:07" (1/1) ... [2023-03-30 22:45:07,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:45:07,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:45:07,894 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label24.c[60015,60028] [2023-03-30 22:45:07,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:45:07,935 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:45:08,101 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label24.c[60015,60028] [2023-03-30 22:45:08,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:45:08,125 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:45:08,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:08 WrapperNode [2023-03-30 22:45:08,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:45:08,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:45:08,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:45:08,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:45:08,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:08" (1/1) ... [2023-03-30 22:45:08,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:08" (1/1) ... [2023-03-30 22:45:08,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:08" (1/1) ... [2023-03-30 22:45:08,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:08" (1/1) ... [2023-03-30 22:45:08,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:08" (1/1) ... [2023-03-30 22:45:08,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:08" (1/1) ... [2023-03-30 22:45:08,236 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:08" (1/1) ... [2023-03-30 22:45:08,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:08" (1/1) ... [2023-03-30 22:45:08,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:45:08,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:45:08,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:45:08,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:45:08,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:08" (1/1) ... [2023-03-30 22:45:08,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:45:08,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:08,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 22:45:08,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 22:45:08,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:45:08,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:45:08,333 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:45:08,333 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 22:45:08,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:45:08,333 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 22:45:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:45:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:45:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:45:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:45:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:45:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 22:45:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:45:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:45:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:45:08,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:45:08,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:45:08,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:45:08,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:45:08,460 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:45:08,462 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:45:10,004 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:45:10,018 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:45:10,018 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 22:45:10,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:45:10 BoogieIcfgContainer [2023-03-30 22:45:10,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:45:10,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:45:10,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:45:10,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:45:10,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:45:07" (1/3) ... [2023-03-30 22:45:10,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f8a018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:45:10, skipping insertion in model container [2023-03-30 22:45:10,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:45:08" (2/3) ... [2023-03-30 22:45:10,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f8a018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:45:10, skipping insertion in model container [2023-03-30 22:45:10,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:45:10" (3/3) ... [2023-03-30 22:45:10,034 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label24.c [2023-03-30 22:45:10,050 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:45:10,050 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:45:10,118 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:45:10,125 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;@22c8a25e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:45:10,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:45:10,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:45:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-03-30 22:45:10,165 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:10,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:45:10,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:10,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:10,171 INFO L85 PathProgramCache]: Analyzing trace with hash 62061729, now seen corresponding path program 1 times [2023-03-30 22:45:10,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:10,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397484947] [2023-03-30 22:45:10,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:10,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:11,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:11,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:11,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397484947] [2023-03-30 22:45:11,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397484947] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:11,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:45:11,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:45:11,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712020331] [2023-03-30 22:45:11,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:11,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:45:11,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:11,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:45:11,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:45:11,580 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:45:13,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:13,605 INFO L93 Difference]: Finished difference Result 889 states and 1547 transitions. [2023-03-30 22:45:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:45:13,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 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 197 [2023-03-30 22:45:13,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:13,619 INFO L225 Difference]: With dead ends: 889 [2023-03-30 22:45:13,619 INFO L226 Difference]: Without dead ends: 485 [2023-03-30 22:45:13,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:45:13,631 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 648 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:13,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 51 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-30 22:45:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2023-03-30 22:45:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 475. [2023-03-30 22:45:13,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 465 states have (on average 1.5483870967741935) internal successors, (720), 467 states have internal predecessors, (720), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 22:45:13,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 731 transitions. [2023-03-30 22:45:13,801 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 731 transitions. Word has length 197 [2023-03-30 22:45:13,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:13,802 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 731 transitions. [2023-03-30 22:45:13,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:45:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 731 transitions. [2023-03-30 22:45:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-03-30 22:45:13,807 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:13,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:45:13,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:45:13,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:13,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:13,809 INFO L85 PathProgramCache]: Analyzing trace with hash 971764066, now seen corresponding path program 1 times [2023-03-30 22:45:13,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:13,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857369602] [2023-03-30 22:45:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:13,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:14,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:14,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:14,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:14,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857369602] [2023-03-30 22:45:14,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857369602] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:14,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:45:14,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:45:14,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062872816] [2023-03-30 22:45:14,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:14,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:45:14,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:14,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:45:14,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:45:14,646 INFO L87 Difference]: Start difference. First operand 475 states and 731 transitions. Second operand has 7 states, 6 states have (on average 33.833333333333336) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:45:16,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:16,509 INFO L93 Difference]: Finished difference Result 1426 states and 2228 transitions. [2023-03-30 22:45:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:45:16,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 33.833333333333336) internal successors, (203), 4 states have internal predecessors, (203), 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 209 [2023-03-30 22:45:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:16,522 INFO L225 Difference]: With dead ends: 1426 [2023-03-30 22:45:16,523 INFO L226 Difference]: Without dead ends: 957 [2023-03-30 22:45:16,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:45:16,532 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1651 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:16,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 125 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-30 22:45:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2023-03-30 22:45:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 936. [2023-03-30 22:45:16,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 915 states have (on average 1.5224043715846995) internal successors, (1393), 924 states have internal predecessors, (1393), 6 states have call successors, (6), 6 states have call predecessors, (6), 14 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-03-30 22:45:16,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1428 transitions. [2023-03-30 22:45:16,583 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1428 transitions. Word has length 209 [2023-03-30 22:45:16,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:16,584 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1428 transitions. [2023-03-30 22:45:16,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 33.833333333333336) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:45:16,584 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1428 transitions. [2023-03-30 22:45:16,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-03-30 22:45:16,588 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:16,588 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 22:45:16,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:45:16,589 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:16,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:16,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1123650435, now seen corresponding path program 1 times [2023-03-30 22:45:16,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:16,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711868765] [2023-03-30 22:45:16,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:16,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:17,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:17,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:17,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:17,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711868765] [2023-03-30 22:45:17,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711868765] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:17,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:45:17,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 22:45:17,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28144341] [2023-03-30 22:45:17,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:17,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:45:17,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:17,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:45:17,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:45:17,305 INFO L87 Difference]: Start difference. First operand 936 states and 1428 transitions. Second operand has 8 states, 7 states have (on average 29.142857142857142) internal successors, (204), 5 states have internal predecessors, (204), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:45:20,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:20,189 INFO L93 Difference]: Finished difference Result 3686 states and 5860 transitions. [2023-03-30 22:45:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 22:45:20,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 29.142857142857142) internal successors, (204), 5 states have internal predecessors, (204), 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 210 [2023-03-30 22:45:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:20,208 INFO L225 Difference]: With dead ends: 3686 [2023-03-30 22:45:20,208 INFO L226 Difference]: Without dead ends: 2756 [2023-03-30 22:45:20,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:45:20,220 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1116 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:20,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 159 Invalid, 2268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-03-30 22:45:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2023-03-30 22:45:20,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2712. [2023-03-30 22:45:20,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2641 states have (on average 1.408936009087467) internal successors, (3721), 2684 states have internal predecessors, (3721), 14 states have call successors, (14), 14 states have call predecessors, (14), 56 states have return successors, (213), 13 states have call predecessors, (213), 13 states have call successors, (213) [2023-03-30 22:45:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 3948 transitions. [2023-03-30 22:45:20,369 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 3948 transitions. Word has length 210 [2023-03-30 22:45:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:20,369 INFO L495 AbstractCegarLoop]: Abstraction has 2712 states and 3948 transitions. [2023-03-30 22:45:20,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 29.142857142857142) internal successors, (204), 5 states have internal predecessors, (204), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:45:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 3948 transitions. [2023-03-30 22:45:20,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-03-30 22:45:20,378 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:20,378 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:45:20,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 22:45:20,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:20,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:20,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1924267066, now seen corresponding path program 1 times [2023-03-30 22:45:20,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:20,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70438493] [2023-03-30 22:45:20,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:20,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:21,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:21,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:21,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:21,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70438493] [2023-03-30 22:45:21,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70438493] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:21,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:45:21,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:45:21,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005934384] [2023-03-30 22:45:21,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:21,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:45:21,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:21,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:45:21,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:45:21,273 INFO L87 Difference]: Start difference. First operand 2712 states and 3948 transitions. Second operand has 7 states, 6 states have (on average 34.166666666666664) internal successors, (205), 4 states have internal predecessors, (205), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:45:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:23,212 INFO L93 Difference]: Finished difference Result 6852 states and 10215 transitions. [2023-03-30 22:45:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 22:45:23,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 34.166666666666664) internal successors, (205), 4 states have internal predecessors, (205), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 211 [2023-03-30 22:45:23,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:23,240 INFO L225 Difference]: With dead ends: 6852 [2023-03-30 22:45:23,240 INFO L226 Difference]: Without dead ends: 4146 [2023-03-30 22:45:23,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:45:23,253 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1203 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1203 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:23,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1203 Valid, 118 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 22:45:23,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2023-03-30 22:45:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 4075. [2023-03-30 22:45:23,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4075 states, 3943 states have (on average 1.3783920872432158) internal successors, (5435), 4035 states have internal predecessors, (5435), 20 states have call successors, (20), 20 states have call predecessors, (20), 111 states have return successors, (410), 19 states have call predecessors, (410), 19 states have call successors, (410) [2023-03-30 22:45:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 5865 transitions. [2023-03-30 22:45:23,425 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 5865 transitions. Word has length 211 [2023-03-30 22:45:23,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:23,426 INFO L495 AbstractCegarLoop]: Abstraction has 4075 states and 5865 transitions. [2023-03-30 22:45:23,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 34.166666666666664) internal successors, (205), 4 states have internal predecessors, (205), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:45:23,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 5865 transitions. [2023-03-30 22:45:23,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-03-30 22:45:23,440 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:23,440 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 22:45:23,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-30 22:45:23,440 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:23,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:23,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1597146381, now seen corresponding path program 1 times [2023-03-30 22:45:23,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:23,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778438947] [2023-03-30 22:45:23,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:23,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:25,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:25,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:25,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:25,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778438947] [2023-03-30 22:45:25,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778438947] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:25,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674486934] [2023-03-30 22:45:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:25,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:25,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:25,250 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:45:25,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:45:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:25,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:45:25,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:25,788 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:45:25,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674486934] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:25,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:45:25,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-03-30 22:45:25,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483325667] [2023-03-30 22:45:25,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:25,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:45:25,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:25,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:45:25,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:45:25,791 INFO L87 Difference]: Start difference. First operand 4075 states and 5865 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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) [2023-03-30 22:45:26,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:26,621 INFO L93 Difference]: Finished difference Result 12014 states and 17852 transitions. [2023-03-30 22:45:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:45:26,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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 218 [2023-03-30 22:45:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:26,660 INFO L225 Difference]: With dead ends: 12014 [2023-03-30 22:45:26,661 INFO L226 Difference]: Without dead ends: 7945 [2023-03-30 22:45:26,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:45:26,673 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 72 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:26,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 414 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 22:45:26,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2023-03-30 22:45:26,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 7939. [2023-03-30 22:45:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7939 states, 7706 states have (on average 1.3102777056838828) internal successors, (10097), 7863 states have internal predecessors, (10097), 38 states have call successors, (38), 38 states have call predecessors, (38), 194 states have return successors, (1089), 37 states have call predecessors, (1089), 37 states have call successors, (1089) [2023-03-30 22:45:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7939 states to 7939 states and 11224 transitions. [2023-03-30 22:45:26,953 INFO L78 Accepts]: Start accepts. Automaton has 7939 states and 11224 transitions. Word has length 218 [2023-03-30 22:45:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:26,953 INFO L495 AbstractCegarLoop]: Abstraction has 7939 states and 11224 transitions. [2023-03-30 22:45:26,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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) [2023-03-30 22:45:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 7939 states and 11224 transitions. [2023-03-30 22:45:26,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-03-30 22:45:26,975 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:26,975 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:45:26,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 22:45:27,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:27,182 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:27,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:27,182 INFO L85 PathProgramCache]: Analyzing trace with hash -782612098, now seen corresponding path program 1 times [2023-03-30 22:45:27,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:27,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873902906] [2023-03-30 22:45:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:27,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:28,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:28,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:28,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:45:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:45:28,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:28,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873902906] [2023-03-30 22:45:28,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873902906] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:28,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578559786] [2023-03-30 22:45:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:28,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:28,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:28,213 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:45:28,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:45:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:28,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:45:28,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-30 22:45:28,699 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:45:28,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578559786] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:28,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:45:28,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2023-03-30 22:45:28,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848984466] [2023-03-30 22:45:28,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:28,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:45:28,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:28,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:45:28,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:45:28,700 INFO L87 Difference]: Start difference. First operand 7939 states and 11224 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:45:29,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:29,609 INFO L93 Difference]: Finished difference Result 22708 states and 32879 transitions. [2023-03-30 22:45:29,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:45:29,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 222 [2023-03-30 22:45:29,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:29,691 INFO L225 Difference]: With dead ends: 22708 [2023-03-30 22:45:29,691 INFO L226 Difference]: Without dead ends: 14775 [2023-03-30 22:45:29,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:45:29,713 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 53 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:29,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 429 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 22:45:29,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14775 states. [2023-03-30 22:45:30,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14775 to 14717. [2023-03-30 22:45:30,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14717 states, 14343 states have (on average 1.2929652095098654) internal successors, (18545), 14577 states have internal predecessors, (18545), 70 states have call successors, (70), 70 states have call predecessors, (70), 303 states have return successors, (2495), 69 states have call predecessors, (2495), 69 states have call successors, (2495) [2023-03-30 22:45:30,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14717 states to 14717 states and 21110 transitions. [2023-03-30 22:45:30,190 INFO L78 Accepts]: Start accepts. Automaton has 14717 states and 21110 transitions. Word has length 222 [2023-03-30 22:45:30,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:30,190 INFO L495 AbstractCegarLoop]: Abstraction has 14717 states and 21110 transitions. [2023-03-30 22:45:30,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:45:30,191 INFO L276 IsEmpty]: Start isEmpty. Operand 14717 states and 21110 transitions. [2023-03-30 22:45:30,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-03-30 22:45:30,230 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:30,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 22:45:30,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:45:30,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-30 22:45:30,438 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:30,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:30,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1360604173, now seen corresponding path program 1 times [2023-03-30 22:45:30,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:30,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650321563] [2023-03-30 22:45:30,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:30,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:31,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:31,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:31,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:45:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:45:31,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:31,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650321563] [2023-03-30 22:45:31,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650321563] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:31,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527633511] [2023-03-30 22:45:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:31,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:31,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:31,665 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:45:31,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:45:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:31,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:45:31,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-30 22:45:32,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:45:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-30 22:45:32,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527633511] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:32,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:45:32,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 14 [2023-03-30 22:45:32,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497949846] [2023-03-30 22:45:32,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:32,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:45:32,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:32,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:45:32,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-03-30 22:45:32,231 INFO L87 Difference]: Start difference. First operand 14717 states and 21110 transitions. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 4 states have internal predecessors, (211), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:45:33,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:33,327 INFO L93 Difference]: Finished difference Result 29616 states and 42666 transitions. [2023-03-30 22:45:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:45:33,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 4 states have internal predecessors, (211), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 225 [2023-03-30 22:45:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:33,440 INFO L225 Difference]: With dead ends: 29616 [2023-03-30 22:45:33,440 INFO L226 Difference]: Without dead ends: 14905 [2023-03-30 22:45:33,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 444 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:45:33,469 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 785 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:33,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 153 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 22:45:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14905 states. [2023-03-30 22:45:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14905 to 14881. [2023-03-30 22:45:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14881 states, 14425 states have (on average 1.2401386481802426) internal successors, (17889), 14741 states have internal predecessors, (17889), 70 states have call successors, (70), 70 states have call predecessors, (70), 385 states have return successors, (2192), 69 states have call predecessors, (2192), 69 states have call successors, (2192) [2023-03-30 22:45:33,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14881 states to 14881 states and 20151 transitions. [2023-03-30 22:45:33,898 INFO L78 Accepts]: Start accepts. Automaton has 14881 states and 20151 transitions. Word has length 225 [2023-03-30 22:45:33,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:33,898 INFO L495 AbstractCegarLoop]: Abstraction has 14881 states and 20151 transitions. [2023-03-30 22:45:33,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 4 states have internal predecessors, (211), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:45:33,898 INFO L276 IsEmpty]: Start isEmpty. Operand 14881 states and 20151 transitions. [2023-03-30 22:45:33,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-03-30 22:45:33,939 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:33,940 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:45:33,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:45:34,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:34,147 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:34,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:34,148 INFO L85 PathProgramCache]: Analyzing trace with hash 723386653, now seen corresponding path program 1 times [2023-03-30 22:45:34,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:34,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780888311] [2023-03-30 22:45:34,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:34,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:34,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:34,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:34,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:45:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:34,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-30 22:45:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-03-30 22:45:34,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:34,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780888311] [2023-03-30 22:45:34,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780888311] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:34,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235961327] [2023-03-30 22:45:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:34,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:34,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:34,661 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:45:34,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:45:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:34,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:45:34,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-30 22:45:35,063 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:45:35,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235961327] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:35,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:45:35,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-30 22:45:35,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247817152] [2023-03-30 22:45:35,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:35,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:45:35,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:35,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:45:35,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:45:35,065 INFO L87 Difference]: Start difference. First operand 14881 states and 20151 transitions. Second operand has 5 states, 5 states have (on average 43.4) internal successors, (217), 4 states have internal predecessors, (217), 3 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:45:35,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:35,835 INFO L93 Difference]: Finished difference Result 44444 states and 62763 transitions. [2023-03-30 22:45:35,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:45:35,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 4 states have internal predecessors, (217), 3 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 244 [2023-03-30 22:45:35,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:35,963 INFO L225 Difference]: With dead ends: 44444 [2023-03-30 22:45:35,963 INFO L226 Difference]: Without dead ends: 29569 [2023-03-30 22:45:36,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:45:36,007 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 1080 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:36,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 917 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:45:36,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29569 states. [2023-03-30 22:45:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29569 to 29299. [2023-03-30 22:45:36,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29299 states, 28400 states have (on average 1.240105633802817) internal successors, (35219), 29027 states have internal predecessors, (35219), 136 states have call successors, (136), 136 states have call predecessors, (136), 762 states have return successors, (4658), 135 states have call predecessors, (4658), 135 states have call successors, (4658) [2023-03-30 22:45:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29299 states to 29299 states and 40013 transitions. [2023-03-30 22:45:36,999 INFO L78 Accepts]: Start accepts. Automaton has 29299 states and 40013 transitions. Word has length 244 [2023-03-30 22:45:36,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:36,999 INFO L495 AbstractCegarLoop]: Abstraction has 29299 states and 40013 transitions. [2023-03-30 22:45:36,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 4 states have internal predecessors, (217), 3 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 22:45:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 29299 states and 40013 transitions. [2023-03-30 22:45:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-03-30 22:45:37,166 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:37,166 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:45:37,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:45:37,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:37,367 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:37,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:37,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1607055229, now seen corresponding path program 1 times [2023-03-30 22:45:37,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:37,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612764130] [2023-03-30 22:45:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:37,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:38,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:38,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:38,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:45:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:38,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-03-30 22:45:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 53 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-03-30 22:45:38,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:38,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612764130] [2023-03-30 22:45:38,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612764130] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:38,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85908894] [2023-03-30 22:45:38,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:38,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:38,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:38,649 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:45:38,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:45:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:38,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:45:38,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-03-30 22:45:39,085 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:45:39,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85908894] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:45:39,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:45:39,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-03-30 22:45:39,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432212311] [2023-03-30 22:45:39,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:45:39,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:45:39,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:39,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:45:39,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:45:39,087 INFO L87 Difference]: Start difference. First operand 29299 states and 40013 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:45:40,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:40,190 INFO L93 Difference]: Finished difference Result 58598 states and 80050 transitions. [2023-03-30 22:45:40,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:45:40,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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 257 [2023-03-30 22:45:40,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:45:40,297 INFO L225 Difference]: With dead ends: 58598 [2023-03-30 22:45:40,297 INFO L226 Difference]: Without dead ends: 29305 [2023-03-30 22:45:40,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:45:40,344 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:45:40,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 415 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 22:45:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29305 states. [2023-03-30 22:45:41,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29305 to 29279. [2023-03-30 22:45:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29279 states, 28390 states have (on average 1.23349771046143) internal successors, (35019), 29007 states have internal predecessors, (35019), 136 states have call successors, (136), 136 states have call predecessors, (136), 752 states have return successors, (4514), 135 states have call predecessors, (4514), 135 states have call successors, (4514) [2023-03-30 22:45:41,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29279 states to 29279 states and 39669 transitions. [2023-03-30 22:45:41,187 INFO L78 Accepts]: Start accepts. Automaton has 29279 states and 39669 transitions. Word has length 257 [2023-03-30 22:45:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:45:41,187 INFO L495 AbstractCegarLoop]: Abstraction has 29279 states and 39669 transitions. [2023-03-30 22:45:41,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:45:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 29279 states and 39669 transitions. [2023-03-30 22:45:41,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-03-30 22:45:41,237 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:45:41,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:45:41,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:45:41,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:41,445 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:45:41,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:41,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2011532503, now seen corresponding path program 1 times [2023-03-30 22:45:41,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:41,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525073725] [2023-03-30 22:45:41,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:41,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:42,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:42,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:42,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:45:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:45:42,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:42,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525073725] [2023-03-30 22:45:42,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525073725] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:42,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287069098] [2023-03-30 22:45:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:42,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:42,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:42,324 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:45:42,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:45:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:42,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:45:42,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:42,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:45:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:45:42,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287069098] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:45:42,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:45:42,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-03-30 22:45:42,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606015149] [2023-03-30 22:45:42,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:45:42,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-30 22:45:42,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:42,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-30 22:45:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-03-30 22:45:42,806 INFO L87 Difference]: Start difference. First operand 29279 states and 39669 transitions. Second operand has 13 states, 13 states have (on average 25.0) internal successors, (325), 11 states have internal predecessors, (325), 5 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7)