/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/Problem13_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:26:27,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:26:27,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:26:27,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:26:27,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:26:27,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:26:27,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:26:27,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:26:27,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:26:27,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:26:27,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:26:27,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:26:27,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:26:27,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:26:27,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:26:27,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:26:27,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:26:27,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:26:27,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:26:27,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:26:27,336 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 23:26:27,352 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:26:27,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:26:27,352 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:26:27,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:26:27,354 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:26:27,355 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:26:27,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:26:27,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:26:27,355 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:26:27,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:26:27,356 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:26:27,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:26:27,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:26:27,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:26:27,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:26:27,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:26:27,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:26:27,356 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:26:27,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:26:27,356 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:26:27,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:26:27,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:26:27,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:26:27,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:26:27,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:26:27,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:26:27,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:26:27,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:26:27,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:26:27,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:26:27,358 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:26:27,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:26:27,358 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:26:27,358 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:26:27,358 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:26:27,358 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:26:27,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:26:27,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:26:27,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:26:27,556 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:26:27,556 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:26:27,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label53.c [2023-03-30 23:26:28,547 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:26:28,921 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:26:28,921 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label53.c [2023-03-30 23:26:28,947 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f90f2cc0/55f4f81ad6b2450b9f7cae5a887908d4/FLAG704b44ac2 [2023-03-30 23:26:28,958 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f90f2cc0/55f4f81ad6b2450b9f7cae5a887908d4 [2023-03-30 23:26:28,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:26:28,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:26:28,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:26:28,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:26:28,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:26:28,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:26:28" (1/1) ... [2023-03-30 23:26:28,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5add554a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:28, skipping insertion in model container [2023-03-30 23:26:28,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:26:28" (1/1) ... [2023-03-30 23:26:28,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:26:29,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:26:29,254 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/Problem13_label53.c[4658,4671] [2023-03-30 23:26:29,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:26:29,863 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:26:29,885 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/Problem13_label53.c[4658,4671] [2023-03-30 23:26:30,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:26:30,294 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:26:30,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:30 WrapperNode [2023-03-30 23:26:30,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:26:30,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:26:30,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:26:30,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:26:30,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:30" (1/1) ... [2023-03-30 23:26:30,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:30" (1/1) ... [2023-03-30 23:26:30,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:30" (1/1) ... [2023-03-30 23:26:30,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:30" (1/1) ... [2023-03-30 23:26:30,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:30" (1/1) ... [2023-03-30 23:26:30,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:30" (1/1) ... [2023-03-30 23:26:30,506 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:30" (1/1) ... [2023-03-30 23:26:30,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:30" (1/1) ... [2023-03-30 23:26:30,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:26:30,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:26:30,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:26:30,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:26:30,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:30" (1/1) ... [2023-03-30 23:26:30,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:26:30,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:26:30,705 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 23:26:30,721 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 23:26:30,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:26:30,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:26:30,736 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:26:30,736 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:26:30,736 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:26:30,736 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:26:30,736 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:26:30,736 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:26:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:26:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:26:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:26:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:26:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:26:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:26:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:26:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:26:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:26:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:26:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:26:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:26:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:26:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:26:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:26:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:26:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:26:30,805 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:26:30,806 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:26:34,260 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:26:34,276 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:26:34,276 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:26:34,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:26:34 BoogieIcfgContainer [2023-03-30 23:26:34,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:26:34,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:26:34,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:26:34,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:26:34,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:26:28" (1/3) ... [2023-03-30 23:26:34,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4a22fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:26:34, skipping insertion in model container [2023-03-30 23:26:34,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:26:30" (2/3) ... [2023-03-30 23:26:34,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4a22fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:26:34, skipping insertion in model container [2023-03-30 23:26:34,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:26:34" (3/3) ... [2023-03-30 23:26:34,302 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label53.c [2023-03-30 23:26:34,330 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:26:34,330 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:26:34,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:26:34,465 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;@5b995ef6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:26:34,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:26:34,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 23:26:34,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-03-30 23:26:34,492 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:26:34,492 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] [2023-03-30 23:26:34,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:26:34,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:26:34,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1819438468, now seen corresponding path program 1 times [2023-03-30 23:26:34,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:26:34,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796929580] [2023-03-30 23:26:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:26:34,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:26:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:34,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:26:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:34,781 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 23:26:34,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:26:34,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796929580] [2023-03-30 23:26:34,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796929580] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:26:34,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:26:34,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:26:34,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116030936] [2023-03-30 23:26:34,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:26:34,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:26:34,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:26:34,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:26:34,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:26:34,805 INFO L87 Difference]: Start difference. First operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 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 23:26:39,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:26:39,837 INFO L93 Difference]: Finished difference Result 3230 states and 5909 transitions. [2023-03-30 23:26:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:26:39,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 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 37 [2023-03-30 23:26:39,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:26:39,885 INFO L225 Difference]: With dead ends: 3230 [2023-03-30 23:26:39,886 INFO L226 Difference]: Without dead ends: 2026 [2023-03-30 23:26:39,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:26:39,906 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 3028 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 4486 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3028 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 5089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 4486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:26:39,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3028 Valid, 300 Invalid, 5089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 4486 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-03-30 23:26:39,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2023-03-30 23:26:40,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 2009. [2023-03-30 23:26:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1981 states have (on average 1.6436143361938416) internal successors, (3256), 1983 states have internal predecessors, (3256), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (25), 15 states have call predecessors, (25), 9 states have call successors, (25) [2023-03-30 23:26:40,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3291 transitions. [2023-03-30 23:26:40,050 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3291 transitions. Word has length 37 [2023-03-30 23:26:40,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:26:40,050 INFO L495 AbstractCegarLoop]: Abstraction has 2009 states and 3291 transitions. [2023-03-30 23:26:40,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 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 23:26:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3291 transitions. [2023-03-30 23:26:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-03-30 23:26:40,053 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:26:40,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:26:40,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:26:40,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:26:40,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:26:40,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1293413257, now seen corresponding path program 1 times [2023-03-30 23:26:40,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:26:40,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425617990] [2023-03-30 23:26:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:26:40,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:26:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:40,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:26:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:40,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:26:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:26:40,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:26:40,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425617990] [2023-03-30 23:26:40,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425617990] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:26:40,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:26:40,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:26:40,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935909763] [2023-03-30 23:26:40,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:26:40,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:26:40,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:26:40,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:26:40,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:26:40,578 INFO L87 Difference]: Start difference. First operand 2009 states and 3291 transitions. Second operand has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 4 states have internal predecessors, (106), 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 23:26:47,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:26:47,350 INFO L93 Difference]: Finished difference Result 5863 states and 9700 transitions. [2023-03-30 23:26:47,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:26:47,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 4 states have internal predecessors, (106), 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 112 [2023-03-30 23:26:47,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:26:47,362 INFO L225 Difference]: With dead ends: 5863 [2023-03-30 23:26:47,363 INFO L226 Difference]: Without dead ends: 3860 [2023-03-30 23:26:47,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:26:47,366 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 3296 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 7739 mSolverCounterSat, 1185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3296 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 8924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1185 IncrementalHoareTripleChecker+Valid, 7739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:26:47,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3296 Valid, 815 Invalid, 8924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1185 Valid, 7739 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-03-30 23:26:47,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2023-03-30 23:26:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3760. [2023-03-30 23:26:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3760 states, 3688 states have (on average 1.4899674620390455) internal successors, (5495), 3700 states have internal predecessors, (5495), 18 states have call successors, (18), 18 states have call predecessors, (18), 53 states have return successors, (117), 41 states have call predecessors, (117), 17 states have call successors, (117) [2023-03-30 23:26:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3760 states to 3760 states and 5630 transitions. [2023-03-30 23:26:47,446 INFO L78 Accepts]: Start accepts. Automaton has 3760 states and 5630 transitions. Word has length 112 [2023-03-30 23:26:47,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:26:47,447 INFO L495 AbstractCegarLoop]: Abstraction has 3760 states and 5630 transitions. [2023-03-30 23:26:47,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 4 states have internal predecessors, (106), 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 23:26:47,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3760 states and 5630 transitions. [2023-03-30 23:26:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-03-30 23:26:47,453 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:26:47,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:26:47,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:26:47,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:26:47,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:26:47,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1589500645, now seen corresponding path program 1 times [2023-03-30 23:26:47,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:26:47,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535065223] [2023-03-30 23:26:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:26:47,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:26:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:47,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:26:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:47,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:26:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:26:47,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:26:47,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535065223] [2023-03-30 23:26:47,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535065223] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:26:47,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:26:47,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:26:47,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327523647] [2023-03-30 23:26:47,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:26:47,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:26:47,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:26:47,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:26:47,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:26:47,760 INFO L87 Difference]: Start difference. First operand 3760 states and 5630 transitions. Second operand has 8 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 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 23:26:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:26:55,702 INFO L93 Difference]: Finished difference Result 14591 states and 22901 transitions. [2023-03-30 23:26:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:26:55,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 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 126 [2023-03-30 23:26:55,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:26:55,741 INFO L225 Difference]: With dead ends: 14591 [2023-03-30 23:26:55,741 INFO L226 Difference]: Without dead ends: 10837 [2023-03-30 23:26:55,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:26:55,753 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 4932 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 8284 mSolverCounterSat, 1969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4932 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 10253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1969 IncrementalHoareTripleChecker+Valid, 8284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:26:55,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4932 Valid, 813 Invalid, 10253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1969 Valid, 8284 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2023-03-30 23:26:55,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10837 states. [2023-03-30 23:26:56,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10837 to 10751. [2023-03-30 23:26:56,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10751 states, 10420 states have (on average 1.3433781190019194) internal successors, (13998), 10488 states have internal predecessors, (13998), 50 states have call successors, (50), 50 states have call predecessors, (50), 280 states have return successors, (1257), 212 states have call predecessors, (1257), 49 states have call successors, (1257) [2023-03-30 23:26:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10751 states to 10751 states and 15305 transitions. [2023-03-30 23:26:56,060 INFO L78 Accepts]: Start accepts. Automaton has 10751 states and 15305 transitions. Word has length 126 [2023-03-30 23:26:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:26:56,061 INFO L495 AbstractCegarLoop]: Abstraction has 10751 states and 15305 transitions. [2023-03-30 23:26:56,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 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 23:26:56,062 INFO L276 IsEmpty]: Start isEmpty. Operand 10751 states and 15305 transitions. [2023-03-30 23:26:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-03-30 23:26:56,066 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:26:56,066 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:26:56,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:26:56,066 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:26:56,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:26:56,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1079086728, now seen corresponding path program 1 times [2023-03-30 23:26:56,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:26:56,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523028503] [2023-03-30 23:26:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:26:56,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:26:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:56,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:26:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:56,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:26:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:26:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:26:56,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:26:56,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523028503] [2023-03-30 23:26:56,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523028503] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:26:56,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:26:56,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:26:56,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267774573] [2023-03-30 23:26:56,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:26:56,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:26:56,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:26:56,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:26:56,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:26:56,326 INFO L87 Difference]: Start difference. First operand 10751 states and 15305 transitions. Second operand has 8 states, 7 states have (on average 21.285714285714285) internal successors, (149), 5 states have internal predecessors, (149), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:27:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:27:03,951 INFO L93 Difference]: Finished difference Result 39561 states and 60675 transitions. [2023-03-30 23:27:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:27:03,951 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 21.285714285714285) internal successors, (149), 5 states have internal predecessors, (149), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 155 [2023-03-30 23:27:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:27:04,023 INFO L225 Difference]: With dead ends: 39561 [2023-03-30 23:27:04,023 INFO L226 Difference]: Without dead ends: 28816 [2023-03-30 23:27:04,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:27:04,049 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 5236 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 7481 mSolverCounterSat, 2178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5236 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 9659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2178 IncrementalHoareTripleChecker+Valid, 7481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:27:04,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5236 Valid, 569 Invalid, 9659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2178 Valid, 7481 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-03-30 23:27:04,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28816 states. [2023-03-30 23:27:04,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28816 to 28710. [2023-03-30 23:27:04,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28710 states, 27783 states have (on average 1.2116402116402116) internal successors, (33663), 28013 states have internal predecessors, (33663), 134 states have call successors, (134), 134 states have call predecessors, (134), 792 states have return successors, (5011), 562 states have call predecessors, (5011), 133 states have call successors, (5011) [2023-03-30 23:27:04,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28710 states to 28710 states and 38808 transitions. [2023-03-30 23:27:04,516 INFO L78 Accepts]: Start accepts. Automaton has 28710 states and 38808 transitions. Word has length 155 [2023-03-30 23:27:04,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:27:04,518 INFO L495 AbstractCegarLoop]: Abstraction has 28710 states and 38808 transitions. [2023-03-30 23:27:04,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 21.285714285714285) internal successors, (149), 5 states have internal predecessors, (149), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:27:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 28710 states and 38808 transitions. [2023-03-30 23:27:04,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-03-30 23:27:04,521 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:27:04,522 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:27:04,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-30 23:27:04,522 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:27:04,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:27:04,523 INFO L85 PathProgramCache]: Analyzing trace with hash -915012552, now seen corresponding path program 1 times [2023-03-30 23:27:04,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:27:04,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30008517] [2023-03-30 23:27:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:27:04,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:27:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:04,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:27:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:04,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:27:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:04,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-03-30 23:27:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-03-30 23:27:04,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:27:04,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30008517] [2023-03-30 23:27:04,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30008517] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:27:04,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390347880] [2023-03-30 23:27:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:27:04,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:27:04,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:27:04,900 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 23:27:04,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:27:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:05,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:27:05,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:27:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-03-30 23:27:05,110 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:27:05,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390347880] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:27:05,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:27:05,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:27:05,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153353538] [2023-03-30 23:27:05,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:27:05,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:27:05,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:27:05,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:27:05,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:27:05,112 INFO L87 Difference]: Start difference. First operand 28710 states and 38808 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 23:27:08,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:27:08,302 INFO L93 Difference]: Finished difference Result 64221 states and 88794 transitions. [2023-03-30 23:27:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:27:08,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 237 [2023-03-30 23:27:08,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:27:08,402 INFO L225 Difference]: With dead ends: 64221 [2023-03-30 23:27:08,403 INFO L226 Difference]: Without dead ends: 35517 [2023-03-30 23:27:08,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:27:08,451 INFO L413 NwaCegarLoop]: 1900 mSDtfsCounter, 829 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 2584 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 2073 SdHoareTripleChecker+Invalid, 3202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 2584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:27:08,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 2073 Invalid, 3202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 2584 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-30 23:27:08,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35517 states. [2023-03-30 23:27:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35517 to 35496. [2023-03-30 23:27:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35496 states, 34367 states have (on average 1.1874763581342567) internal successors, (40810), 34651 states have internal predecessors, (40810), 166 states have call successors, (166), 166 states have call predecessors, (166), 962 states have return successors, (6525), 678 states have call predecessors, (6525), 165 states have call successors, (6525) [2023-03-30 23:27:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35496 states to 35496 states and 47501 transitions. [2023-03-30 23:27:09,126 INFO L78 Accepts]: Start accepts. Automaton has 35496 states and 47501 transitions. Word has length 237 [2023-03-30 23:27:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:27:09,127 INFO L495 AbstractCegarLoop]: Abstraction has 35496 states and 47501 transitions. [2023-03-30 23:27:09,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 23:27:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 35496 states and 47501 transitions. [2023-03-30 23:27:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-03-30 23:27:09,130 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:27:09,130 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:27:09,136 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 23:27:09,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:27:09,337 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:27:09,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:27:09,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1225547122, now seen corresponding path program 1 times [2023-03-30 23:27:09,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:27:09,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099706694] [2023-03-30 23:27:09,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:27:09,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:27:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:09,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:27:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:09,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:27:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:09,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-03-30 23:27:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-03-30 23:27:09,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:27:09,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099706694] [2023-03-30 23:27:09,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099706694] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:27:09,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724484613] [2023-03-30 23:27:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:27:09,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:27:09,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:27:09,771 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 23:27:09,797 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 23:27:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:09,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:27:09,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:27:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-03-30 23:27:09,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:27:09,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724484613] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:27:09,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:27:09,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:27:09,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140445837] [2023-03-30 23:27:09,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:27:09,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:27:09,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:27:09,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:27:09,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:27:09,940 INFO L87 Difference]: Start difference. First operand 35496 states and 47501 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 23:27:12,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:27:12,846 INFO L93 Difference]: Finished difference Result 70987 states and 95070 transitions. [2023-03-30 23:27:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:27:12,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 246 [2023-03-30 23:27:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:27:12,922 INFO L225 Difference]: With dead ends: 70987 [2023-03-30 23:27:12,922 INFO L226 Difference]: Without dead ends: 35497 [2023-03-30 23:27:12,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:27:12,960 INFO L413 NwaCegarLoop]: 1409 mSDtfsCounter, 1195 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:27:12,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1195 Valid, 1514 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 2458 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-03-30 23:27:12,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35497 states. [2023-03-30 23:27:13,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35497 to 33082. [2023-03-30 23:27:13,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33082 states, 31979 states have (on average 1.1349635698427092) internal successors, (36295), 32262 states have internal predecessors, (36295), 154 states have call successors, (154), 154 states have call predecessors, (154), 948 states have return successors, (4569), 665 states have call predecessors, (4569), 153 states have call successors, (4569) [2023-03-30 23:27:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33082 states to 33082 states and 41018 transitions. [2023-03-30 23:27:13,485 INFO L78 Accepts]: Start accepts. Automaton has 33082 states and 41018 transitions. Word has length 246 [2023-03-30 23:27:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:27:13,486 INFO L495 AbstractCegarLoop]: Abstraction has 33082 states and 41018 transitions. [2023-03-30 23:27:13,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 23:27:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 33082 states and 41018 transitions. [2023-03-30 23:27:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-03-30 23:27:13,495 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:27:13,495 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:27:13,509 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 23:27:13,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-30 23:27:13,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:27:13,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:27:13,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1777461075, now seen corresponding path program 1 times [2023-03-30 23:27:13,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:27:13,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725380304] [2023-03-30 23:27:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:27:13,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:27:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:13,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:27:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:13,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:27:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:13,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-03-30 23:27:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:27:13,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:27:13,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725380304] [2023-03-30 23:27:13,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725380304] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:27:13,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857208824] [2023-03-30 23:27:13,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:27:13,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:27:13,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:27:13,971 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 23:27:13,972 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 23:27:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:14,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:27:14,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:27:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-03-30 23:27:14,115 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:27:14,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857208824] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:27:14,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:27:14,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-03-30 23:27:14,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063739325] [2023-03-30 23:27:14,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:27:14,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:27:14,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:27:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:27:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:27:14,116 INFO L87 Difference]: Start difference. First operand 33082 states and 41018 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 23:27:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:27:17,536 INFO L93 Difference]: Finished difference Result 74449 states and 94404 transitions. [2023-03-30 23:27:17,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:27:17,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 259 [2023-03-30 23:27:17,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:27:17,625 INFO L225 Difference]: With dead ends: 74449 [2023-03-30 23:27:17,625 INFO L226 Difference]: Without dead ends: 41373 [2023-03-30 23:27:17,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:27:17,666 INFO L413 NwaCegarLoop]: 795 mSDtfsCounter, 998 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 2410 mSolverCounterSat, 902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 3312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 2410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:27:17,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 899 Invalid, 3312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 2410 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-03-30 23:27:17,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41373 states. [2023-03-30 23:27:18,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41373 to 40544. [2023-03-30 23:27:18,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40544 states, 39277 states have (on average 1.1176260916057743) internal successors, (43897), 39601 states have internal predecessors, (43897), 190 states have call successors, (190), 190 states have call predecessors, (190), 1076 states have return successors, (5750), 752 states have call predecessors, (5750), 189 states have call successors, (5750) [2023-03-30 23:27:18,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40544 states to 40544 states and 49837 transitions. [2023-03-30 23:27:18,281 INFO L78 Accepts]: Start accepts. Automaton has 40544 states and 49837 transitions. Word has length 259 [2023-03-30 23:27:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:27:18,283 INFO L495 AbstractCegarLoop]: Abstraction has 40544 states and 49837 transitions. [2023-03-30 23:27:18,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 23:27:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 40544 states and 49837 transitions. [2023-03-30 23:27:18,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2023-03-30 23:27:18,291 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:27:18,291 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:18,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:27:18,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:27:18,497 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:27:18,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:27:18,497 INFO L85 PathProgramCache]: Analyzing trace with hash -132624355, now seen corresponding path program 1 times [2023-03-30 23:27:18,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:27:18,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784576212] [2023-03-30 23:27:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:27:18,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:27:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:19,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:27:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:19,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:27:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:19,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-03-30 23:27:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:19,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-03-30 23:27:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 95 proven. 237 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-30 23:27:19,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:27:19,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784576212] [2023-03-30 23:27:19,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784576212] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:27:19,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333267311] [2023-03-30 23:27:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:27:19,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:27:19,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:27:19,545 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 23:27:19,545 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 23:27:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:27:19,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:27:19,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:27:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 251 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-03-30 23:27:19,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:27:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 251 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-03-30 23:27:20,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333267311] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:27:20,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:27:20,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2023-03-30 23:27:20,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55727815] [2023-03-30 23:27:20,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:27:20,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-30 23:27:20,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:27:20,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-30 23:27:20,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-03-30 23:27:20,034 INFO L87 Difference]: Start difference. First operand 40544 states and 49837 transitions. Second operand has 15 states, 15 states have (on average 34.6) internal successors, (519), 13 states have internal predecessors, (519), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8)