/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_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:43:57,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:43:57,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:43:57,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:43:57,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:43:57,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:43:57,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:43:57,771 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 22:43:57,797 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:43:57,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:43:57,798 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:43:57,798 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:43:57,799 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:43:57,799 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:43:57,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:43:57,800 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:43:57,800 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:43:57,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:43:57,800 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:43:57,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:43:57,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:43:57,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:43:57,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:43:57,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:43:57,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:43:57,801 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:43:57,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:43:57,801 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:43:57,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:43:57,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:43:57,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:43:57,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:43:57,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:43:57,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:43:57,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:43:57,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:43:57,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:43:57,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:43:57,802 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:43:57,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:43:57,803 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:43:57,803 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:43:57,803 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:43:57,803 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:43:57,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:43:57,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:43:57,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:43:57,979 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:43:57,980 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:43:57,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label02.c [2023-03-30 22:43:58,934 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:43:59,206 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:43:59,206 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label02.c [2023-03-30 22:43:59,216 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cce55c326/8162a6740e6041c0835677f0106ab85f/FLAG6b94e7cfd [2023-03-30 22:43:59,227 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cce55c326/8162a6740e6041c0835677f0106ab85f [2023-03-30 22:43:59,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:43:59,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:43:59,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:43:59,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:43:59,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:43:59,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:43:59" (1/1) ... [2023-03-30 22:43:59,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41130629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:43:59, skipping insertion in model container [2023-03-30 22:43:59,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:43:59" (1/1) ... [2023-03-30 22:43:59,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:43:59,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:43:59,592 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_label02.c[61770,61783] [2023-03-30 22:43:59,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:43:59,618 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:43:59,724 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_label02.c[61770,61783] [2023-03-30 22:43:59,729 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:43:59,784 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:43:59,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:43:59 WrapperNode [2023-03-30 22:43:59,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:43:59,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:43:59,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:43:59,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:43:59,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:43:59" (1/1) ... [2023-03-30 22:43:59,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:43:59" (1/1) ... [2023-03-30 22:43:59,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:43:59" (1/1) ... [2023-03-30 22:43:59,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:43:59" (1/1) ... [2023-03-30 22:43:59,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:43:59" (1/1) ... [2023-03-30 22:43:59,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:43:59" (1/1) ... [2023-03-30 22:43:59,893 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:43:59" (1/1) ... [2023-03-30 22:43:59,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:43:59" (1/1) ... [2023-03-30 22:43:59,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:43:59,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:43:59,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:43:59,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:43:59,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:43:59" (1/1) ... [2023-03-30 22:43:59,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:43:59,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:43:59,938 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 22:43:59,945 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 22:43:59,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:43:59,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:43:59,969 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:43:59,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 22:43:59,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:43:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 22:43:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:43:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:43:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:43:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:43:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:43:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 22:43:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:43:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:43:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:43:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:43:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:43:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:43:59,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:44:00,043 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:44:00,044 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:44:01,238 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:44:01,256 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:44:01,256 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 22:44:01,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:44:01 BoogieIcfgContainer [2023-03-30 22:44:01,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:44:01,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:44:01,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:44:01,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:44:01,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:43:59" (1/3) ... [2023-03-30 22:44:01,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700fd9a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:44:01, skipping insertion in model container [2023-03-30 22:44:01,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:43:59" (2/3) ... [2023-03-30 22:44:01,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700fd9a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:44:01, skipping insertion in model container [2023-03-30 22:44:01,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:44:01" (3/3) ... [2023-03-30 22:44:01,268 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label02.c [2023-03-30 22:44:01,283 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:44:01,283 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:44:01,332 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:44:01,338 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;@30714293, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:44:01,338 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:44:01,344 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 22:44:01,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-03-30 22:44:01,367 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:01,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:44:01,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:01,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:01,372 INFO L85 PathProgramCache]: Analyzing trace with hash -838679326, now seen corresponding path program 1 times [2023-03-30 22:44:01,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:01,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552431493] [2023-03-30 22:44:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:01,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:02,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:02,312 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 22:44:02,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:02,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552431493] [2023-03-30 22:44:02,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552431493] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:02,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:44:02,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:44:02,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942158717] [2023-03-30 22:44:02,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:02,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:44:02,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:02,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:44:02,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:44:02,356 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 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 22:44:04,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:04,670 INFO L93 Difference]: Finished difference Result 1107 states and 1968 transitions. [2023-03-30 22:44:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:44:04,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 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 210 [2023-03-30 22:44:04,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:04,692 INFO L225 Difference]: With dead ends: 1107 [2023-03-30 22:44:04,692 INFO L226 Difference]: Without dead ends: 699 [2023-03-30 22:44:04,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:44:04,699 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 936 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:04,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 70 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-03-30 22:44:04,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2023-03-30 22:44:04,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 474. [2023-03-30 22:44:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 464 states have (on average 1.5280172413793103) internal successors, (709), 466 states have internal predecessors, (709), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 22:44:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 720 transitions. [2023-03-30 22:44:04,794 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 720 transitions. Word has length 210 [2023-03-30 22:44:04,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:04,795 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 720 transitions. [2023-03-30 22:44:04,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 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 22:44:04,795 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 720 transitions. [2023-03-30 22:44:04,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-03-30 22:44:04,798 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:04,798 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:44:04,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:44:04,798 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:04,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:04,799 INFO L85 PathProgramCache]: Analyzing trace with hash 522932673, now seen corresponding path program 1 times [2023-03-30 22:44:04,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:04,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248903348] [2023-03-30 22:44:04,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:04,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:05,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:05,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:05,373 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 22:44:05,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:05,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248903348] [2023-03-30 22:44:05,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248903348] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:05,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:44:05,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:44:05,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584365] [2023-03-30 22:44:05,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:05,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:44:05,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:05,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:44:05,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:44:05,378 INFO L87 Difference]: Start difference. First operand 474 states and 720 transitions. Second operand has 7 states, 6 states have (on average 36.0) internal successors, (216), 4 states have internal predecessors, (216), 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 22:44:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:06,927 INFO L93 Difference]: Finished difference Result 1422 states and 2199 transitions. [2023-03-30 22:44:06,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:44:06,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 36.0) internal successors, (216), 4 states have internal predecessors, (216), 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 222 [2023-03-30 22:44:06,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:06,932 INFO L225 Difference]: With dead ends: 1422 [2023-03-30 22:44:06,932 INFO L226 Difference]: Without dead ends: 954 [2023-03-30 22:44:06,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:44:06,934 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1220 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:06,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 142 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-30 22:44:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2023-03-30 22:44:06,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 934. [2023-03-30 22:44:06,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 914 states have (on average 1.5) internal successors, (1371), 922 states have internal predecessors, (1371), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-03-30 22:44:06,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1406 transitions. [2023-03-30 22:44:06,966 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1406 transitions. Word has length 222 [2023-03-30 22:44:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:06,967 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1406 transitions. [2023-03-30 22:44:06,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 36.0) internal successors, (216), 4 states have internal predecessors, (216), 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 22:44:06,967 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1406 transitions. [2023-03-30 22:44:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-03-30 22:44:06,970 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:06,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:06,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:44:06,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:06,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:06,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1048974230, now seen corresponding path program 1 times [2023-03-30 22:44:06,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:06,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540377482] [2023-03-30 22:44:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:06,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:07,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:07,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:07,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:07,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540377482] [2023-03-30 22:44:07,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540377482] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:07,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:44:07,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:44:07,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368258528] [2023-03-30 22:44:07,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:07,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:44:07,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:07,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:44:07,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:44:07,453 INFO L87 Difference]: Start difference. First operand 934 states and 1406 transitions. Second operand has 7 states, 6 states have (on average 38.5) internal successors, (231), 4 states have internal predecessors, (231), 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 22:44:09,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:09,017 INFO L93 Difference]: Finished difference Result 2796 states and 4340 transitions. [2023-03-30 22:44:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 22:44:09,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 38.5) internal successors, (231), 4 states have internal predecessors, (231), 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 237 [2023-03-30 22:44:09,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:09,024 INFO L225 Difference]: With dead ends: 2796 [2023-03-30 22:44:09,025 INFO L226 Difference]: Without dead ends: 1868 [2023-03-30 22:44:09,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:44:09,028 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 742 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:09,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 121 Invalid, 1626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-30 22:44:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2023-03-30 22:44:09,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1822. [2023-03-30 22:44:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1766 states have (on average 1.3216308040770102) internal successors, (2334), 1802 states have internal predecessors, (2334), 10 states have call successors, (10), 10 states have call predecessors, (10), 45 states have return successors, (116), 9 states have call predecessors, (116), 9 states have call successors, (116) [2023-03-30 22:44:09,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2460 transitions. [2023-03-30 22:44:09,121 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2460 transitions. Word has length 237 [2023-03-30 22:44:09,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:09,122 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2460 transitions. [2023-03-30 22:44:09,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 38.5) internal successors, (231), 4 states have internal predecessors, (231), 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 22:44:09,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2460 transitions. [2023-03-30 22:44:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-03-30 22:44:09,128 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:09,128 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:09,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 22:44:09,128 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:09,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:09,129 INFO L85 PathProgramCache]: Analyzing trace with hash -329988806, now seen corresponding path program 1 times [2023-03-30 22:44:09,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:09,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892990565] [2023-03-30 22:44:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:09,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:09,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:09,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:09,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:44:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:44:09,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:09,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892990565] [2023-03-30 22:44:09,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892990565] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:09,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591562829] [2023-03-30 22:44:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:09,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:09,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:09,603 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:44:09,620 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 22:44:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:09,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:44:09,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 22:44:09,905 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:44:09,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591562829] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:09,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:44:09,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-30 22:44:09,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540084078] [2023-03-30 22:44:09,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:09,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:44:09,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:09,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:44:09,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:44:09,907 INFO L87 Difference]: Start difference. First operand 1822 states and 2460 transitions. Second operand has 5 states, 5 states have (on average 45.6) internal successors, (228), 4 states have internal predecessors, (228), 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 22:44:10,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:10,252 INFO L93 Difference]: Finished difference Result 5521 states and 7679 transitions. [2023-03-30 22:44:10,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:44:10,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.6) internal successors, (228), 4 states have internal predecessors, (228), 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 240 [2023-03-30 22:44:10,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:10,265 INFO L225 Difference]: With dead ends: 5521 [2023-03-30 22:44:10,266 INFO L226 Difference]: Without dead ends: 3705 [2023-03-30 22:44:10,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 242 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 22:44:10,270 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1080 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:10,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 922 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:44:10,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2023-03-30 22:44:10,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 3668. [2023-03-30 22:44:10,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3668 states, 3540 states have (on average 1.3200564971751412) internal successors, (4673), 3632 states have internal predecessors, (4673), 18 states have call successors, (18), 18 states have call predecessors, (18), 109 states have return successors, (327), 17 states have call predecessors, (327), 17 states have call successors, (327) [2023-03-30 22:44:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 5018 transitions. [2023-03-30 22:44:10,375 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 5018 transitions. Word has length 240 [2023-03-30 22:44:10,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:10,375 INFO L495 AbstractCegarLoop]: Abstraction has 3668 states and 5018 transitions. [2023-03-30 22:44:10,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.6) internal successors, (228), 4 states have internal predecessors, (228), 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 22:44:10,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 5018 transitions. [2023-03-30 22:44:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-03-30 22:44:10,384 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:10,384 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:10,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:44:10,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:10,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:10,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:10,591 INFO L85 PathProgramCache]: Analyzing trace with hash 680117631, now seen corresponding path program 1 times [2023-03-30 22:44:10,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:10,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531147851] [2023-03-30 22:44:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:10,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:11,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:11,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:11,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:44:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:44:11,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:11,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531147851] [2023-03-30 22:44:11,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531147851] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:11,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339233928] [2023-03-30 22:44:11,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:11,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:11,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:11,240 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 22:44:11,265 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 22:44:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:11,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:44:11,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-30 22:44:11,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:44:11,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339233928] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:11,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:44:11,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-03-30 22:44:11,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147310520] [2023-03-30 22:44:11,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:11,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:44:11,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:11,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:44:11,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:44:11,648 INFO L87 Difference]: Start difference. First operand 3668 states and 5018 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 22:44:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:12,294 INFO L93 Difference]: Finished difference Result 10839 states and 15154 transitions. [2023-03-30 22:44:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:44:12,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 255 [2023-03-30 22:44:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:12,320 INFO L225 Difference]: With dead ends: 10839 [2023-03-30 22:44:12,320 INFO L226 Difference]: Without dead ends: 7177 [2023-03-30 22:44:12,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:44:12,329 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 70 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:12,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 239 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-30 22:44:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7177 states. [2023-03-30 22:44:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7177 to 7149. [2023-03-30 22:44:12,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7149 states, 6925 states have (on average 1.283898916967509) internal successors, (8891), 7081 states have internal predecessors, (8891), 34 states have call successors, (34), 34 states have call predecessors, (34), 189 states have return successors, (783), 33 states have call predecessors, (783), 33 states have call successors, (783) [2023-03-30 22:44:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7149 states to 7149 states and 9708 transitions. [2023-03-30 22:44:12,533 INFO L78 Accepts]: Start accepts. Automaton has 7149 states and 9708 transitions. Word has length 255 [2023-03-30 22:44:12,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:12,534 INFO L495 AbstractCegarLoop]: Abstraction has 7149 states and 9708 transitions. [2023-03-30 22:44:12,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 22:44:12,534 INFO L276 IsEmpty]: Start isEmpty. Operand 7149 states and 9708 transitions. [2023-03-30 22:44:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-03-30 22:44:12,548 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:12,548 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:12,555 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 22:44:12,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:12,754 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:12,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:12,754 INFO L85 PathProgramCache]: Analyzing trace with hash 82426386, now seen corresponding path program 1 times [2023-03-30 22:44:12,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:12,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443201371] [2023-03-30 22:44:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:12,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:13,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:13,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:13,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:44:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:44:13,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:13,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443201371] [2023-03-30 22:44:13,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443201371] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:13,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60528296] [2023-03-30 22:44:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:13,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:13,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:13,690 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 22:44:13,692 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 22:44:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:13,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:44:13,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-30 22:44:14,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:44:14,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60528296] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:14,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:44:14,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-03-30 22:44:14,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986374280] [2023-03-30 22:44:14,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:14,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:44:14,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:14,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:44:14,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:44:14,073 INFO L87 Difference]: Start difference. First operand 7149 states and 9708 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 22:44:14,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:14,786 INFO L93 Difference]: Finished difference Result 21158 states and 29458 transitions. [2023-03-30 22:44:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:44:14,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 256 [2023-03-30 22:44:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:14,839 INFO L225 Difference]: With dead ends: 21158 [2023-03-30 22:44:14,839 INFO L226 Difference]: Without dead ends: 14015 [2023-03-30 22:44:14,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:44:14,856 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 40 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:14,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 382 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-30 22:44:14,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14015 states. [2023-03-30 22:44:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14015 to 13929. [2023-03-30 22:44:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13929 states, 13563 states have (on average 1.253336282533363) internal successors, (16999), 13797 states have internal predecessors, (16999), 66 states have call successors, (66), 66 states have call predecessors, (66), 299 states have return successors, (1829), 65 states have call predecessors, (1829), 65 states have call successors, (1829) [2023-03-30 22:44:15,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13929 states to 13929 states and 18894 transitions. [2023-03-30 22:44:15,183 INFO L78 Accepts]: Start accepts. Automaton has 13929 states and 18894 transitions. Word has length 256 [2023-03-30 22:44:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:15,183 INFO L495 AbstractCegarLoop]: Abstraction has 13929 states and 18894 transitions. [2023-03-30 22:44:15,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 22:44:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 13929 states and 18894 transitions. [2023-03-30 22:44:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2023-03-30 22:44:15,215 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:15,215 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 22:44:15,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-30 22:44:15,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:15,421 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:15,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash -193196778, now seen corresponding path program 1 times [2023-03-30 22:44:15,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:15,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211039839] [2023-03-30 22:44:15,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:15,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:16,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:16,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:16,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:44:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:16,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-03-30 22:44:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 68 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-30 22:44:16,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:16,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211039839] [2023-03-30 22:44:16,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211039839] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:16,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333201434] [2023-03-30 22:44:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:16,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:16,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:16,441 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 22:44:16,443 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 22:44:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:16,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:44:16,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-03-30 22:44:16,855 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:44:16,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333201434] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:16,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:44:16,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2023-03-30 22:44:16,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831196354] [2023-03-30 22:44:16,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:16,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:44:16,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:16,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:44:16,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:44:16,857 INFO L87 Difference]: Start difference. First operand 13929 states and 18894 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 22:44:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:17,731 INFO L93 Difference]: Finished difference Result 40206 states and 55309 transitions. [2023-03-30 22:44:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:44:17,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 282 [2023-03-30 22:44:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:17,809 INFO L225 Difference]: With dead ends: 40206 [2023-03-30 22:44:17,809 INFO L226 Difference]: Without dead ends: 26283 [2023-03-30 22:44:17,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 286 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 22:44:17,831 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 63 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:17,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 226 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 22:44:17,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26283 states. [2023-03-30 22:44:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26283 to 26279. [2023-03-30 22:44:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26279 states, 25648 states have (on average 1.2223955084217093) internal successors, (31352), 26031 states have internal predecessors, (31352), 124 states have call successors, (124), 124 states have call predecessors, (124), 506 states have return successors, (3493), 123 states have call predecessors, (3493), 123 states have call successors, (3493) [2023-03-30 22:44:18,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26279 states to 26279 states and 34969 transitions. [2023-03-30 22:44:18,387 INFO L78 Accepts]: Start accepts. Automaton has 26279 states and 34969 transitions. Word has length 282 [2023-03-30 22:44:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:18,388 INFO L495 AbstractCegarLoop]: Abstraction has 26279 states and 34969 transitions. [2023-03-30 22:44:18,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 22:44:18,388 INFO L276 IsEmpty]: Start isEmpty. Operand 26279 states and 34969 transitions. [2023-03-30 22:44:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-03-30 22:44:18,452 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:18,452 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:18,460 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 22:44:18,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:18,658 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:18,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:18,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1894273788, now seen corresponding path program 1 times [2023-03-30 22:44:18,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:18,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063324840] [2023-03-30 22:44:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:18,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:19,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:19,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:19,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:44:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:44:19,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:19,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063324840] [2023-03-30 22:44:19,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063324840] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:19,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416957355] [2023-03-30 22:44:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:19,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:19,175 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 22:44:19,177 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 22:44:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:19,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:44:19,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:19,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:44:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:19,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416957355] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:44:19,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:44:19,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 22:44:19,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995117947] [2023-03-30 22:44:19,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:44:19,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:44:19,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:19,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:44:19,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:44:19,714 INFO L87 Difference]: Start difference. First operand 26279 states and 34969 transitions. Second operand has 12 states, 12 states have (on average 34.916666666666664) internal successors, (419), 10 states have internal predecessors, (419), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 22:44:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:22,497 INFO L93 Difference]: Finished difference Result 64051 states and 91137 transitions. [2023-03-30 22:44:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 22:44:22,498 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 34.916666666666664) internal successors, (419), 10 states have internal predecessors, (419), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 296 [2023-03-30 22:44:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:22,585 INFO L225 Difference]: With dead ends: 64051 [2023-03-30 22:44:22,586 INFO L226 Difference]: Without dead ends: 37778 [2023-03-30 22:44:22,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 595 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2023-03-30 22:44:22,618 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2413 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2417 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2413 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 2417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:22,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2413 Valid, 191 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 2417 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-30 22:44:22,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37778 states. [2023-03-30 22:44:23,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37778 to 37398. [2023-03-30 22:44:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37398 states, 36491 states have (on average 1.1870050149351894) internal successors, (43315), 37046 states have internal predecessors, (43315), 176 states have call successors, (176), 176 states have call predecessors, (176), 730 states have return successors, (5171), 175 states have call predecessors, (5171), 175 states have call successors, (5171) [2023-03-30 22:44:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37398 states to 37398 states and 48662 transitions. [2023-03-30 22:44:23,493 INFO L78 Accepts]: Start accepts. Automaton has 37398 states and 48662 transitions. Word has length 296 [2023-03-30 22:44:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:23,493 INFO L495 AbstractCegarLoop]: Abstraction has 37398 states and 48662 transitions. [2023-03-30 22:44:23,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.916666666666664) internal successors, (419), 10 states have internal predecessors, (419), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 22:44:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 37398 states and 48662 transitions. [2023-03-30 22:44:23,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-03-30 22:44:23,561 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:23,561 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:44:23,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-30 22:44:23,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:23,768 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:23,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:23,768 INFO L85 PathProgramCache]: Analyzing trace with hash -680215121, now seen corresponding path program 1 times [2023-03-30 22:44:23,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:23,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045699271] [2023-03-30 22:44:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:23,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:24,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:24,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:24,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-03-30 22:44:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 218 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:44:24,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:24,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045699271] [2023-03-30 22:44:24,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045699271] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:24,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905024642] [2023-03-30 22:44:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:24,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:24,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:24,804 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 22:44:24,806 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 22:44:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:25,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:44:25,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 222 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:25,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:44:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 222 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:25,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905024642] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:44:25,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:44:25,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-03-30 22:44:25,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934719504] [2023-03-30 22:44:25,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:44:25,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-30 22:44:25,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:25,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-30 22:44:25,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-03-30 22:44:25,291 INFO L87 Difference]: Start difference. First operand 37398 states and 48662 transitions. Second operand has 14 states, 14 states have (on average 35.57142857142857) internal successors, (498), 12 states have internal predecessors, (498), 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) [2023-03-30 22:44:44,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:44,327 INFO L93 Difference]: Finished difference Result 149469 states and 235354 transitions. [2023-03-30 22:44:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-03-30 22:44:44,328 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 35.57142857142857) internal successors, (498), 12 states have internal predecessors, (498), 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) Word has length 375 [2023-03-30 22:44:44,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:44,329 INFO L225 Difference]: With dead ends: 149469 [2023-03-30 22:44:44,329 INFO L226 Difference]: Without dead ends: 0 [2023-03-30 22:44:44,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8658 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2158, Invalid=18722, Unknown=0, NotChecked=0, Total=20880 [2023-03-30 22:44:44,509 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 4248 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 23330 mSolverCounterSat, 1423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4252 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 24753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1423 IncrementalHoareTripleChecker+Valid, 23330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:44,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4252 Valid, 1294 Invalid, 24753 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1423 Valid, 23330 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2023-03-30 22:44:44,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-03-30 22:44:44,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-03-30 22:44:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-03-30 22:44:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-03-30 22:44:44,511 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 375 [2023-03-30 22:44:44,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:44,511 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-03-30 22:44:44,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 35.57142857142857) internal successors, (498), 12 states have internal predecessors, (498), 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) [2023-03-30 22:44:44,511 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-03-30 22:44:44,511 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-03-30 22:44:44,513 INFO L805 garLoopResultBuilder]: Registering result SAFE for location calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-30 22:44:44,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 22:44:44,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:44,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.