/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/Problem17_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:39:08,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:39:08,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:39:08,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:39:08,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:39:08,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:39:08,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:39:08,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:39:08,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:39:08,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:39:08,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:39:08,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:39:08,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:39:08,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:39:08,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:39:08,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:39:08,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:39:08,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:39:08,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:39:08,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:39:08,508 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 23:39:08,530 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:39:08,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:39:08,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:39:08,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:39:08,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:39:08,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:39:08,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:39:08,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:39:08,533 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:39:08,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:39:08,533 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:39:08,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:39:08,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:39:08,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:39:08,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:39:08,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:39:08,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:39:08,534 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:39:08,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:39:08,534 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:39:08,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:39:08,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:39:08,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:39:08,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:39:08,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:39:08,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:39:08,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:39:08,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:39:08,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:39:08,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:39:08,535 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:39:08,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:39:08,535 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:39:08,535 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:39:08,535 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:39:08,536 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:39:08,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:39:08,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:39:08,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:39:08,760 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:39:08,761 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:39:08,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label11.c [2023-03-30 23:39:09,735 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:39:10,003 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:39:10,003 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label11.c [2023-03-30 23:39:10,020 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83ed3bf7b/fd64b61e6ee14866a045263701a1fa46/FLAG9c2f439c5 [2023-03-30 23:39:10,033 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83ed3bf7b/fd64b61e6ee14866a045263701a1fa46 [2023-03-30 23:39:10,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:39:10,036 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:39:10,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:39:10,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:39:10,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:39:10,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:39:10" (1/1) ... [2023-03-30 23:39:10,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30891ed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:39:10, skipping insertion in model container [2023-03-30 23:39:10,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:39:10" (1/1) ... [2023-03-30 23:39:10,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:39:10,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:39:10,282 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/Problem17_label11.c[8243,8256] [2023-03-30 23:39:10,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:39:10,655 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:39:10,676 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/Problem17_label11.c[8243,8256] [2023-03-30 23:39:10,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:39:10,868 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:39:10,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:39:10 WrapperNode [2023-03-30 23:39:10,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:39:10,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:39:10,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:39:10,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:39:10,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:39:10" (1/1) ... [2023-03-30 23:39:10,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:39:10" (1/1) ... [2023-03-30 23:39:10,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:39:10" (1/1) ... [2023-03-30 23:39:10,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:39:10" (1/1) ... [2023-03-30 23:39:10,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:39:10" (1/1) ... [2023-03-30 23:39:10,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:39:10" (1/1) ... [2023-03-30 23:39:10,994 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:39:10" (1/1) ... [2023-03-30 23:39:11,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:39:10" (1/1) ... [2023-03-30 23:39:11,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:39:11,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:39:11,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:39:11,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:39:11,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:39:10" (1/1) ... [2023-03-30 23:39:11,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:39:11,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:39:11,043 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 23:39:11,049 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 23:39:11,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:39:11,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:39:11,075 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:39:11,075 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:39:11,075 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:39:11,075 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:39:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:39:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:39:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:39:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:39:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:39:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:39:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:39:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:39:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:39:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:39:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:39:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:39:11,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:39:11,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:39:11,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:39:11,153 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:39:11,155 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:39:13,539 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:39:13,551 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:39:13,551 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:39:13,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:39:13 BoogieIcfgContainer [2023-03-30 23:39:13,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:39:13,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:39:13,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:39:13,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:39:13,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:39:10" (1/3) ... [2023-03-30 23:39:13,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc972c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:39:13, skipping insertion in model container [2023-03-30 23:39:13,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:39:10" (2/3) ... [2023-03-30 23:39:13,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc972c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:39:13, skipping insertion in model container [2023-03-30 23:39:13,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:39:13" (3/3) ... [2023-03-30 23:39:13,561 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label11.c [2023-03-30 23:39:13,573 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:39:13,573 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:39:13,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:39:13,634 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;@1a8c0404, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:39:13,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:39:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 603 states, 593 states have (on average 1.7993254637436762) internal successors, (1067), 594 states have internal predecessors, (1067), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 23:39:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-03-30 23:39:13,650 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:39:13,650 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] [2023-03-30 23:39:13,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:39:13,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:39:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1971651078, now seen corresponding path program 1 times [2023-03-30 23:39:13,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:39:13,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098283759] [2023-03-30 23:39:13,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:39:13,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:39:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:14,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:39:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:14,093 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 23:39:14,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:39:14,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098283759] [2023-03-30 23:39:14,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098283759] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:39:14,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:39:14,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:39:14,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851772780] [2023-03-30 23:39:14,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:39:14,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:39:14,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:39:14,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:39:14,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:39:14,127 INFO L87 Difference]: Start difference. First operand has 603 states, 593 states have (on average 1.7993254637436762) internal successors, (1067), 594 states have internal predecessors, (1067), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 23:39:17,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:39:17,499 INFO L93 Difference]: Finished difference Result 1729 states and 3137 transitions. [2023-03-30 23:39:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:39:17,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 62 [2023-03-30 23:39:17,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:39:17,512 INFO L225 Difference]: With dead ends: 1729 [2023-03-30 23:39:17,513 INFO L226 Difference]: Without dead ends: 1047 [2023-03-30 23:39:17,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:39:17,522 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1592 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2223 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1592 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 2223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:39:17,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1592 Valid, 137 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 2223 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-30 23:39:17,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2023-03-30 23:39:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1028. [2023-03-30 23:39:17,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1012 states have (on average 1.7233201581027668) internal successors, (1744), 1014 states have internal predecessors, (1744), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2023-03-30 23:39:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1763 transitions. [2023-03-30 23:39:17,582 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1763 transitions. Word has length 62 [2023-03-30 23:39:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:39:17,583 INFO L495 AbstractCegarLoop]: Abstraction has 1028 states and 1763 transitions. [2023-03-30 23:39:17,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 23:39:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1763 transitions. [2023-03-30 23:39:17,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-03-30 23:39:17,586 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:39:17,587 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 23:39:17,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:39:17,587 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:39:17,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:39:17,587 INFO L85 PathProgramCache]: Analyzing trace with hash -594652218, now seen corresponding path program 1 times [2023-03-30 23:39:17,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:39:17,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120789005] [2023-03-30 23:39:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:39:17,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:39:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:17,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:39:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:17,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:39:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:39:17,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:39:17,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120789005] [2023-03-30 23:39:17,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120789005] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:39:17,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:39:17,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:39:17,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992478669] [2023-03-30 23:39:17,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:39:17,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:39:17,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:39:17,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:39:17,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:39:17,954 INFO L87 Difference]: Start difference. First operand 1028 states and 1763 transitions. Second operand has 7 states, 6 states have (on average 20.833333333333332) internal successors, (125), 4 states have internal predecessors, (125), 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 23:39:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:39:21,301 INFO L93 Difference]: Finished difference Result 3035 states and 5276 transitions. [2023-03-30 23:39:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:39:21,301 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 20.833333333333332) internal successors, (125), 4 states have internal predecessors, (125), 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 131 [2023-03-30 23:39:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:39:21,308 INFO L225 Difference]: With dead ends: 3035 [2023-03-30 23:39:21,309 INFO L226 Difference]: Without dead ends: 2013 [2023-03-30 23:39:21,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:39:21,311 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 3331 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 3032 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3331 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 3440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 3032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:39:21,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3331 Valid, 322 Invalid, 3440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 3032 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-30 23:39:21,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2023-03-30 23:39:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1961. [2023-03-30 23:39:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1921 states have (on average 1.5039042165538783) internal successors, (2889), 1931 states have internal predecessors, (2889), 10 states have call successors, (10), 10 states have call predecessors, (10), 29 states have return successors, (64), 19 states have call predecessors, (64), 9 states have call successors, (64) [2023-03-30 23:39:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2963 transitions. [2023-03-30 23:39:21,351 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2963 transitions. Word has length 131 [2023-03-30 23:39:21,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:39:21,351 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 2963 transitions. [2023-03-30 23:39:21,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 20.833333333333332) internal successors, (125), 4 states have internal predecessors, (125), 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 23:39:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2963 transitions. [2023-03-30 23:39:21,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-03-30 23:39:21,353 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:39:21,353 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 23:39:21,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:39:21,354 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:39:21,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:39:21,354 INFO L85 PathProgramCache]: Analyzing trace with hash 250998722, now seen corresponding path program 1 times [2023-03-30 23:39:21,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:39:21,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168319954] [2023-03-30 23:39:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:39:21,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:39:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:21,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:39:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:21,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:39:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:39:21,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:39:21,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168319954] [2023-03-30 23:39:21,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168319954] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:39:21,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:39:21,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:39:21,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116869870] [2023-03-30 23:39:21,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:39:21,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:39:21,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:39:21,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:39:21,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:39:21,612 INFO L87 Difference]: Start difference. First operand 1961 states and 2963 transitions. Second operand has 7 states, 6 states have (on average 21.166666666666668) internal successors, (127), 4 states have internal predecessors, (127), 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 23:39:24,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:39:24,807 INFO L93 Difference]: Finished difference Result 5847 states and 8975 transitions. [2023-03-30 23:39:24,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:39:24,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 21.166666666666668) internal successors, (127), 4 states have internal predecessors, (127), 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 133 [2023-03-30 23:39:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:39:24,818 INFO L225 Difference]: With dead ends: 5847 [2023-03-30 23:39:24,818 INFO L226 Difference]: Without dead ends: 3892 [2023-03-30 23:39:24,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:39:24,821 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 2524 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 2983 mSolverCounterSat, 773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2524 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 3756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 773 IncrementalHoareTripleChecker+Valid, 2983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:39:24,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2524 Valid, 331 Invalid, 3756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [773 Valid, 2983 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-30 23:39:24,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2023-03-30 23:39:24,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 2891. [2023-03-30 23:39:24,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2818 states have (on average 1.3474095102909864) internal successors, (3797), 2845 states have internal predecessors, (3797), 14 states have call successors, (14), 14 states have call predecessors, (14), 58 states have return successors, (145), 31 states have call predecessors, (145), 13 states have call successors, (145) [2023-03-30 23:39:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 3956 transitions. [2023-03-30 23:39:24,872 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 3956 transitions. Word has length 133 [2023-03-30 23:39:24,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:39:24,873 INFO L495 AbstractCegarLoop]: Abstraction has 2891 states and 3956 transitions. [2023-03-30 23:39:24,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 21.166666666666668) internal successors, (127), 4 states have internal predecessors, (127), 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 23:39:24,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 3956 transitions. [2023-03-30 23:39:24,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-03-30 23:39:24,874 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:39:24,874 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 23:39:24,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:39:24,875 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:39:24,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:39:24,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1961575474, now seen corresponding path program 1 times [2023-03-30 23:39:24,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:39:24,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218350419] [2023-03-30 23:39:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:39:24,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:39:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:25,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:39:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:25,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:39:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:39:25,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:39:25,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218350419] [2023-03-30 23:39:25,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218350419] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:39:25,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108787689] [2023-03-30 23:39:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:39:25,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:39:25,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:39:25,109 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 23:39:25,110 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 23:39:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:25,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-30 23:39:25,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:39:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:39:25,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:39:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:39:25,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108787689] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:39:25,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:39:25,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 6] total 10 [2023-03-30 23:39:25,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513223789] [2023-03-30 23:39:25,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:39:25,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:39:25,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:39:25,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:39:25,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:39:25,571 INFO L87 Difference]: Start difference. First operand 2891 states and 3956 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:39:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:39:27,555 INFO L93 Difference]: Finished difference Result 7567 states and 10588 transitions. [2023-03-30 23:39:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:39:27,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 136 [2023-03-30 23:39:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:39:27,569 INFO L225 Difference]: With dead ends: 7567 [2023-03-30 23:39:27,569 INFO L226 Difference]: Without dead ends: 3753 [2023-03-30 23:39:27,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:39:27,585 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 545 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:39:27,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 668 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-03-30 23:39:27,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3753 states. [2023-03-30 23:39:27,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3753 to 3732. [2023-03-30 23:39:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3732 states, 3647 states have (on average 1.253907321085824) internal successors, (4573), 3675 states have internal predecessors, (4573), 18 states have call successors, (18), 18 states have call predecessors, (18), 66 states have return successors, (237), 38 states have call predecessors, (237), 17 states have call successors, (237) [2023-03-30 23:39:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3732 states to 3732 states and 4828 transitions. [2023-03-30 23:39:27,664 INFO L78 Accepts]: Start accepts. Automaton has 3732 states and 4828 transitions. Word has length 136 [2023-03-30 23:39:27,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:39:27,664 INFO L495 AbstractCegarLoop]: Abstraction has 3732 states and 4828 transitions. [2023-03-30 23:39:27,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:39:27,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3732 states and 4828 transitions. [2023-03-30 23:39:27,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-03-30 23:39:27,666 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:39:27,667 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, 2, 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] [2023-03-30 23:39:27,681 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 23:39:27,872 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 23:39:27,872 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:39:27,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:39:27,873 INFO L85 PathProgramCache]: Analyzing trace with hash -472720066, now seen corresponding path program 1 times [2023-03-30 23:39:27,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:39:27,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226904378] [2023-03-30 23:39:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:39:27,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:39:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:28,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:39:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:28,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:39:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:28,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-03-30 23:39:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-03-30 23:39:28,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:39:28,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226904378] [2023-03-30 23:39:28,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226904378] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:39:28,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:39:28,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:39:28,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914747849] [2023-03-30 23:39:28,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:39:28,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 23:39:28,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:39:28,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 23:39:28,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:39:28,195 INFO L87 Difference]: Start difference. First operand 3732 states and 4828 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 4 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:39:31,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:39:31,177 INFO L93 Difference]: Finished difference Result 10112 states and 13658 transitions. [2023-03-30 23:39:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:39:31,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 4 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 231 [2023-03-30 23:39:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:39:31,196 INFO L225 Difference]: With dead ends: 10112 [2023-03-30 23:39:31,196 INFO L226 Difference]: Without dead ends: 6385 [2023-03-30 23:39:31,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:39:31,203 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 2033 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 3914 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2033 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 4244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 3914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:39:31,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2033 Valid, 248 Invalid, 4244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 3914 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-03-30 23:39:31,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6385 states. [2023-03-30 23:39:31,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6385 to 6381. [2023-03-30 23:39:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6381 states, 6251 states have (on average 1.1476563749800033) internal successors, (7174), 6290 states have internal predecessors, (7174), 30 states have call successors, (30), 30 states have call predecessors, (30), 99 states have return successors, (420), 60 states have call predecessors, (420), 29 states have call successors, (420) [2023-03-30 23:39:31,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6381 states to 6381 states and 7624 transitions. [2023-03-30 23:39:31,305 INFO L78 Accepts]: Start accepts. Automaton has 6381 states and 7624 transitions. Word has length 231 [2023-03-30 23:39:31,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:39:31,306 INFO L495 AbstractCegarLoop]: Abstraction has 6381 states and 7624 transitions. [2023-03-30 23:39:31,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 4 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:39:31,306 INFO L276 IsEmpty]: Start isEmpty. Operand 6381 states and 7624 transitions. [2023-03-30 23:39:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-03-30 23:39:31,310 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:39:31,310 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:31,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-30 23:39:31,310 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:39:31,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:39:31,311 INFO L85 PathProgramCache]: Analyzing trace with hash 494654069, now seen corresponding path program 1 times [2023-03-30 23:39:31,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:39:31,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028218126] [2023-03-30 23:39:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:39:31,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:39:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:31,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:39:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:31,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:39:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:31,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-03-30 23:39:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:31,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2023-03-30 23:39:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 212 proven. 115 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-03-30 23:39:32,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:39:32,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028218126] [2023-03-30 23:39:32,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028218126] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:39:32,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125451514] [2023-03-30 23:39:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:39:32,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:39:32,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:39:32,093 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 23:39:32,095 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 23:39:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:39:32,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-30 23:39:32,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:39:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-03-30 23:39:32,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:39:34,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125451514] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:39:34,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:39:34,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-03-30 23:39:34,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709822935] [2023-03-30 23:39:34,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 23:39:34,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-30 23:39:34,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:39:34,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-30 23:39:34,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-03-30 23:39:34,267 INFO L87 Difference]: Start difference. First operand 6381 states and 7624 transitions. Second operand has 16 states, 16 states have (on average 32.4375) internal successors, (519), 14 states have internal predecessors, (519), 7 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-03-30 23:39:40,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:39:46,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:39:51,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:39:53,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:39:57,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:40:00,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:40:02,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:40:04,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:40:07,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:40:09,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:40:12,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:40:14,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0]