/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_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:46:43,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:46:43,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:46:43,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:46:43,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 22:46:43,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 22:46:43,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 22:46:43,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 22:46:43,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 22:46:43,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 22:46:43,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 22:46:43,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 22:46:43,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 22:46:43,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 22:46:43,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 22:46:43,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 22:46:43,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 22:46:43,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 22:46:43,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 22:46:43,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 22:46:43,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 22:46:43,158 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:46:43,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:46:43,159 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:46:43,159 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:46:43,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:46:43,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:46:43,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:46:43,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:46:43,160 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:46:43,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:46:43,160 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:46:43,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:46:43,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:46:43,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:46:43,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:46:43,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:46:43,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:46:43,161 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:46:43,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:46:43,161 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:46:43,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:46:43,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:46:43,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:46:43,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:46:43,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:46:43,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:46:43,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:46:43,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:46:43,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:46:43,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:46:43,163 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:46:43,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:46:43,163 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:46:43,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:46:43,163 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:46:43,163 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:46:43,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:46:43,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:46:43,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:46:43,361 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:46:43,361 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:46:43,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label43.c [2023-04-01 22:46:44,346 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:46:44,736 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:46:44,736 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label43.c [2023-04-01 22:46:44,765 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc318006e/c3ecc1ef568c41a4820469dcec9d516b/FLAG02f7aa6cc [2023-04-01 22:46:44,777 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc318006e/c3ecc1ef568c41a4820469dcec9d516b [2023-04-01 22:46:44,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:46:44,782 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:46:44,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:46:44,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:46:44,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:46:44,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:46:44" (1/1) ... [2023-04-01 22:46:44,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@318abbce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:46:44, skipping insertion in model container [2023-04-01 22:46:44,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:46:44" (1/1) ... [2023-04-01 22:46:44,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:46:44,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:46:45,046 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_label43.c[2870,2883] [2023-04-01 22:46:45,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:46:45,679 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:46:45,698 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_label43.c[2870,2883] [2023-04-01 22:46:46,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:46:46,049 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:46:46,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:46:46 WrapperNode [2023-04-01 22:46:46,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:46:46,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:46:46,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:46:46,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:46:46,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:46:46" (1/1) ... [2023-04-01 22:46:46,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:46:46" (1/1) ... [2023-04-01 22:46:46,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:46:46" (1/1) ... [2023-04-01 22:46:46,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:46:46" (1/1) ... [2023-04-01 22:46:46,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:46:46" (1/1) ... [2023-04-01 22:46:46,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:46:46" (1/1) ... [2023-04-01 22:46:46,248 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:46:46" (1/1) ... [2023-04-01 22:46:46,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:46:46" (1/1) ... [2023-04-01 22:46:46,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:46:46,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:46:46,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:46:46,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:46:46,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:46:46" (1/1) ... [2023-04-01 22:46:46,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:46:46,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:46:46,318 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 22:46:46,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 22:46:46,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:46:46,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:46:46,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:46:46,351 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:46:46,351 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:46:46,351 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 22:46:46,351 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 22:46:46,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:46:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:46:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:46:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 22:46:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 22:46:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:46:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:46:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:46:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:46:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:46:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:46:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:46:46,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:46:46,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:46:46,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:46:46,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:46:46,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:46:46,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:46:46,422 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:46:46,425 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:46:50,262 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:46:50,272 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:46:50,272 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:46:50,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:46:50 BoogieIcfgContainer [2023-04-01 22:46:50,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:46:50,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:46:50,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:46:50,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:46:50,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:46:44" (1/3) ... [2023-04-01 22:46:50,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d43b4db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:46:50, skipping insertion in model container [2023-04-01 22:46:50,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:46:46" (2/3) ... [2023-04-01 22:46:50,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d43b4db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:46:50, skipping insertion in model container [2023-04-01 22:46:50,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:46:50" (3/3) ... [2023-04-01 22:46:50,281 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label43.c [2023-04-01 22:46:50,292 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:46:50,292 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:46:50,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:46:50,355 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;@70f7b95d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:46:50,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:46:50,361 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) [2023-04-01 22:46:50,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 22:46:50,366 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:46:50,366 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] [2023-04-01 22:46:50,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:46:50,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:46:50,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1429099751, now seen corresponding path program 1 times [2023-04-01 22:46:50,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:46:50,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154048693] [2023-04-01 22:46:50,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:46:50,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:46:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:50,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:46:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:46:50,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:46:50,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154048693] [2023-04-01 22:46:50,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154048693] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:46:50,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:46:50,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 22:46:50,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869599282] [2023-04-01 22:46:50,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:46:50,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 22:46:50,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:46:50,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 22:46:50,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 22:46:50,755 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 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:46:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:46:56,272 INFO L93 Difference]: Finished difference Result 3230 states and 5909 transitions. [2023-04-01 22:46:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 22:46:56,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 24 [2023-04-01 22:46:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:46:56,298 INFO L225 Difference]: With dead ends: 3230 [2023-04-01 22:46:56,298 INFO L226 Difference]: Without dead ends: 2026 [2023-04-01 22:46:56,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:46:56,309 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 3041 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 4486 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3041 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, 5.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:46:56,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3041 Valid, 300 Invalid, 5089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 4486 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-04-01 22:46:56,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2023-04-01 22:46:56,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 2009. [2023-04-01 22:46:56,426 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) [2023-04-01 22:46:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3291 transitions. [2023-04-01 22:46:56,436 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3291 transitions. Word has length 24 [2023-04-01 22:46:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:46:56,438 INFO L495 AbstractCegarLoop]: Abstraction has 2009 states and 3291 transitions. [2023-04-01 22:46:56,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:46:56,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3291 transitions. [2023-04-01 22:46:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 22:46:56,443 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:46:56,444 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 22:46:56,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:46:56,444 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:46:56,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:46:56,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1344133075, now seen corresponding path program 1 times [2023-04-01 22:46:56,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:46:56,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587148765] [2023-04-01 22:46:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:46:56,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:46:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:56,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:46:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:56,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:46:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:46:56,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:46:56,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587148765] [2023-04-01 22:46:56,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587148765] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:46:56,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:46:56,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:46:56,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223903695] [2023-04-01 22:46:56,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:46:56,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:46:56,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:46:56,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:46:56,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:46:56,877 INFO L87 Difference]: Start difference. First operand 2009 states and 3291 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:47:03,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:03,650 INFO L93 Difference]: Finished difference Result 5863 states and 9700 transitions. [2023-04-01 22:47:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:47:03,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 4 states have internal predecessors, (93), 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 99 [2023-04-01 22:47:03,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:03,666 INFO L225 Difference]: With dead ends: 5863 [2023-04-01 22:47:03,666 INFO L226 Difference]: Without dead ends: 3860 [2023-04-01 22:47:03,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:47:03,676 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 [2023-04-01 22:47:03,681 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] [2023-04-01 22:47:03,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2023-04-01 22:47:03,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3760. [2023-04-01 22:47:03,749 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) [2023-04-01 22:47:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3760 states to 3760 states and 5630 transitions. [2023-04-01 22:47:03,756 INFO L78 Accepts]: Start accepts. Automaton has 3760 states and 5630 transitions. Word has length 99 [2023-04-01 22:47:03,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:03,756 INFO L495 AbstractCegarLoop]: Abstraction has 3760 states and 5630 transitions. [2023-04-01 22:47:03,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:47:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3760 states and 5630 transitions. [2023-04-01 22:47:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-01 22:47:03,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:03,758 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 22:47:03,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 22:47:03,758 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:03,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:03,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1971573359, now seen corresponding path program 1 times [2023-04-01 22:47:03,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:03,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130847833] [2023-04-01 22:47:03,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:03,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:03,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:03,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:47:03,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:03,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130847833] [2023-04-01 22:47:03,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130847833] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:47:03,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:47:03,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:47:03,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174159957] [2023-04-01 22:47:03,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:47:03,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:47:03,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:03,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:47:03,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:47:03,991 INFO L87 Difference]: Start difference. First operand 3760 states and 5630 transitions. Second operand has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 5 states have internal predecessors, (107), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:47:12,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:12,006 INFO L93 Difference]: Finished difference Result 14591 states and 22901 transitions. [2023-04-01 22:47:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 22:47:12,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 5 states have internal predecessors, (107), 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 113 [2023-04-01 22:47:12,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:12,044 INFO L225 Difference]: With dead ends: 14591 [2023-04-01 22:47:12,044 INFO L226 Difference]: Without dead ends: 10837 [2023-04-01 22:47:12,054 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 [2023-04-01 22:47:12,057 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 4930 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 8284 mSolverCounterSat, 1969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4930 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 [2023-04-01 22:47:12,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4930 Valid, 813 Invalid, 10253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1969 Valid, 8284 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2023-04-01 22:47:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10837 states. [2023-04-01 22:47:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10837 to 10751. [2023-04-01 22:47:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10751 states, 10420 states have (on average 1.343186180422265) internal successors, (13996), 10488 states have internal predecessors, (13996), 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) [2023-04-01 22:47:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10751 states to 10751 states and 15303 transitions. [2023-04-01 22:47:12,262 INFO L78 Accepts]: Start accepts. Automaton has 10751 states and 15303 transitions. Word has length 113 [2023-04-01 22:47:12,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:12,264 INFO L495 AbstractCegarLoop]: Abstraction has 10751 states and 15303 transitions. [2023-04-01 22:47:12,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 5 states have internal predecessors, (107), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:47:12,264 INFO L276 IsEmpty]: Start isEmpty. Operand 10751 states and 15303 transitions. [2023-04-01 22:47:12,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-04-01 22:47:12,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:12,271 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:47:12,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 22:47:12,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:12,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:12,271 INFO L85 PathProgramCache]: Analyzing trace with hash 193857903, now seen corresponding path program 1 times [2023-04-01 22:47:12,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:12,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191806614] [2023-04-01 22:47:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:12,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:12,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:12,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:12,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-04-01 22:47:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 34 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 22:47:12,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:12,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191806614] [2023-04-01 22:47:12,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191806614] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:47:12,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106828927] [2023-04-01 22:47:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:12,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:12,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:47:12,590 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:47:12,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 22:47:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:12,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 22:47:12,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:47:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 22:47:12,913 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:47:12,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106828927] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:47:12,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:47:12,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2023-04-01 22:47:12,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502618692] [2023-04-01 22:47:12,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:47:12,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:47:12,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:12,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:47:12,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-04-01 22:47:12,914 INFO L87 Difference]: Start difference. First operand 10751 states and 15303 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 4 states have internal predecessors, (194), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:47:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:16,904 INFO L93 Difference]: Finished difference Result 31816 states and 47933 transitions. [2023-04-01 22:47:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 22:47:16,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 4 states have internal predecessors, (194), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 218 [2023-04-01 22:47:16,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:16,977 INFO L225 Difference]: With dead ends: 31816 [2023-04-01 22:47:16,978 INFO L226 Difference]: Without dead ends: 21071 [2023-04-01 22:47:17,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:47:17,014 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 3172 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4290 mSolverCounterSat, 1519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3172 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 5809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1519 IncrementalHoareTripleChecker+Valid, 4290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:47:17,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3172 Valid, 679 Invalid, 5809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1519 Valid, 4290 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 22:47:17,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21071 states. [2023-04-01 22:47:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21071 to 20984. [2023-04-01 22:47:17,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20984 states, 20324 states have (on average 1.23002361739815) internal successors, (24999), 20478 states have internal predecessors, (24999), 98 states have call successors, (98), 98 states have call predecessors, (98), 561 states have return successors, (3206), 407 states have call predecessors, (3206), 97 states have call successors, (3206) [2023-04-01 22:47:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20984 states to 20984 states and 28303 transitions. [2023-04-01 22:47:17,490 INFO L78 Accepts]: Start accepts. Automaton has 20984 states and 28303 transitions. Word has length 218 [2023-04-01 22:47:17,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:17,491 INFO L495 AbstractCegarLoop]: Abstraction has 20984 states and 28303 transitions. [2023-04-01 22:47:17,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 4 states have internal predecessors, (194), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:47:17,492 INFO L276 IsEmpty]: Start isEmpty. Operand 20984 states and 28303 transitions. [2023-04-01 22:47:17,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-04-01 22:47:17,495 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:17,496 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:47:17,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 22:47:17,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:17,709 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:17,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:17,710 INFO L85 PathProgramCache]: Analyzing trace with hash -559136810, now seen corresponding path program 1 times [2023-04-01 22:47:17,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:17,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180067403] [2023-04-01 22:47:17,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:17,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:17,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:17,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:17,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:47:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:47:18,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:18,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180067403] [2023-04-01 22:47:18,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180067403] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:47:18,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863086995] [2023-04-01 22:47:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:18,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:18,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:47:18,027 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:47:18,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 22:47:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:18,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 22:47:18,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:47:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:47:18,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:47:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:47:18,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863086995] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:47:18,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:47:18,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2023-04-01 22:47:18,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781696175] [2023-04-01 22:47:18,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:47:18,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 22:47:18,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:18,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 22:47:18,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-01 22:47:18,519 INFO L87 Difference]: Start difference. First operand 20984 states and 28303 transitions. Second operand has 9 states, 9 states have (on average 38.22222222222222) internal successors, (344), 7 states have internal predecessors, (344), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 22:47:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:26,319 INFO L93 Difference]: Finished difference Result 52147 states and 71877 transitions. [2023-04-01 22:47:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 22:47:26,320 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 38.22222222222222) internal successors, (344), 7 states have internal predecessors, (344), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 253 [2023-04-01 22:47:26,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:26,446 INFO L225 Difference]: With dead ends: 52147 [2023-04-01 22:47:26,446 INFO L226 Difference]: Without dead ends: 31169 [2023-04-01 22:47:26,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-04-01 22:47:26,483 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 6163 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 9851 mSolverCounterSat, 1319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6167 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 11170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1319 IncrementalHoareTripleChecker+Valid, 9851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:47:26,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6167 Valid, 574 Invalid, 11170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1319 Valid, 9851 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-04-01 22:47:26,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31169 states. [2023-04-01 22:47:26,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31169 to 30187. [2023-04-01 22:47:26,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30187 states, 29240 states have (on average 1.1631326949384404) internal successors, (34010), 29487 states have internal predecessors, (34010), 143 states have call successors, (143), 142 states have call predecessors, (143), 803 states have return successors, (4308), 557 states have call predecessors, (4308), 142 states have call successors, (4308) [2023-04-01 22:47:26,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30187 states to 30187 states and 38461 transitions. [2023-04-01 22:47:26,985 INFO L78 Accepts]: Start accepts. Automaton has 30187 states and 38461 transitions. Word has length 253 [2023-04-01 22:47:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:26,986 INFO L495 AbstractCegarLoop]: Abstraction has 30187 states and 38461 transitions. [2023-04-01 22:47:26,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 38.22222222222222) internal successors, (344), 7 states have internal predecessors, (344), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 22:47:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 30187 states and 38461 transitions. [2023-04-01 22:47:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-04-01 22:47:26,991 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:26,991 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:47:27,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 22:47:27,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:27,199 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:27,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:27,201 INFO L85 PathProgramCache]: Analyzing trace with hash 901115725, now seen corresponding path program 1 times [2023-04-01 22:47:27,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:27,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111458901] [2023-04-01 22:47:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:27,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:27,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:27,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:27,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:47:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:27,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:47:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2023-04-01 22:47:27,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:27,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111458901] [2023-04-01 22:47:27,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111458901] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:47:27,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747127787] [2023-04-01 22:47:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:27,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:27,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:47:27,555 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:47:27,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 22:47:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:27,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 22:47:27,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:47:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-04-01 22:47:28,007 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:47:28,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747127787] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:47:28,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:47:28,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 22:47:28,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574573801] [2023-04-01 22:47:28,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:47:28,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:47:28,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:28,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:47:28,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:47:28,009 INFO L87 Difference]: Start difference. First operand 30187 states and 38461 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:47:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:32,407 INFO L93 Difference]: Finished difference Result 61898 states and 79705 transitions. [2023-04-01 22:47:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:47:32,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 269 [2023-04-01 22:47:32,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:32,478 INFO L225 Difference]: With dead ends: 61898 [2023-04-01 22:47:32,478 INFO L226 Difference]: Without dead ends: 31721 [2023-04-01 22:47:32,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-04-01 22:47:32,501 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 2470 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 5538 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2470 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 5892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 5538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:47:32,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2470 Valid, 601 Invalid, 5892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 5538 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-04-01 22:47:32,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31721 states. [2023-04-01 22:47:32,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31721 to 31312. [2023-04-01 22:47:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31312 states, 30230 states have (on average 1.157922593450215) internal successors, (35004), 30534 states have internal predecessors, (35004), 146 states have call successors, (146), 146 states have call predecessors, (146), 935 states have return successors, (5000), 631 states have call predecessors, (5000), 145 states have call successors, (5000) [2023-04-01 22:47:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31312 states to 31312 states and 40150 transitions. [2023-04-01 22:47:32,954 INFO L78 Accepts]: Start accepts. Automaton has 31312 states and 40150 transitions. Word has length 269 [2023-04-01 22:47:32,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:32,954 INFO L495 AbstractCegarLoop]: Abstraction has 31312 states and 40150 transitions. [2023-04-01 22:47:32,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:47:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 31312 states and 40150 transitions. [2023-04-01 22:47:32,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-04-01 22:47:32,957 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:32,957 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:47:32,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 22:47:33,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:33,169 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:33,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:33,170 INFO L85 PathProgramCache]: Analyzing trace with hash 382803033, now seen corresponding path program 1 times [2023-04-01 22:47:33,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:33,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907089267] [2023-04-01 22:47:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:33,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:33,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:33,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:33,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:47:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:33,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2023-04-01 22:47:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 129 proven. 74 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-04-01 22:47:33,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:33,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907089267] [2023-04-01 22:47:33,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907089267] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:47:33,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429750009] [2023-04-01 22:47:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:33,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:33,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:47:33,602 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:47:33,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 22:47:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:33,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 22:47:33,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:47:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-04-01 22:47:33,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:47:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 59 proven. 215 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 22:47:34,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429750009] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:47:34,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:47:34,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2023-04-01 22:47:34,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91069748] [2023-04-01 22:47:34,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:47:34,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 22:47:34,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:34,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 22:47:34,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-01 22:47:34,527 INFO L87 Difference]: Start difference. First operand 31312 states and 40150 transitions. Second operand has 17 states, 17 states have (on average 31.294117647058822) internal successors, (532), 15 states have internal predecessors, (532), 7 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:48:06,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:48:06,221 INFO L93 Difference]: Finished difference Result 166819 states and 229753 transitions. [2023-04-01 22:48:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-04-01 22:48:06,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 31.294117647058822) internal successors, (532), 15 states have internal predecessors, (532), 7 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 276 [2023-04-01 22:48:06,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:48:06,777 INFO L225 Difference]: With dead ends: 166819 [2023-04-01 22:48:06,777 INFO L226 Difference]: Without dead ends: 133866 [2023-04-01 22:48:06,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 678 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9479 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3167, Invalid=20703, Unknown=0, NotChecked=0, Total=23870 [2023-04-01 22:48:06,897 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 12632 mSDsluCounter, 2701 mSDsCounter, 0 mSdLazyCounter, 38556 mSolverCounterSat, 6125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12632 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 44681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 6125 IncrementalHoareTripleChecker+Valid, 38556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:48:06,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12632 Valid, 3048 Invalid, 44681 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [6125 Valid, 38556 Invalid, 0 Unknown, 0 Unchecked, 27.5s Time] [2023-04-01 22:48:06,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133866 states. [2023-04-01 22:48:08,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133866 to 125267. [2023-04-01 22:48:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125267 states, 122059 states have (on average 1.09925527818514) internal successors, (134174), 122955 states have internal predecessors, (134174), 598 states have call successors, (598), 598 states have call predecessors, (598), 2609 states have return successors, (23015), 1713 states have call predecessors, (23015), 597 states have call successors, (23015) [2023-04-01 22:48:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125267 states to 125267 states and 157787 transitions. [2023-04-01 22:48:09,762 INFO L78 Accepts]: Start accepts. Automaton has 125267 states and 157787 transitions. Word has length 276 [2023-04-01 22:48:09,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:48:09,762 INFO L495 AbstractCegarLoop]: Abstraction has 125267 states and 157787 transitions. [2023-04-01 22:48:09,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 31.294117647058822) internal successors, (532), 15 states have internal predecessors, (532), 7 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:48:09,763 INFO L276 IsEmpty]: Start isEmpty. Operand 125267 states and 157787 transitions. [2023-04-01 22:48:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2023-04-01 22:48:09,768 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:48:09,769 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:48:09,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 22:48:09,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:48:09,975 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:48:09,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:48:09,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1881498451, now seen corresponding path program 1 times [2023-04-01 22:48:09,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:48:09,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960218931] [2023-04-01 22:48:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:09,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:48:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:10,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:48:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:10,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:48:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:11,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:48:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:11,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2023-04-01 22:48:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 181 proven. 142 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:48:11,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:48:11,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960218931] [2023-04-01 22:48:11,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960218931] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:48:11,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097328941] [2023-04-01 22:48:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:11,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:48:11,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:48:11,241 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:48:11,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 22:48:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:11,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 22:48:11,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:48:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 310 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 22:48:13,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:48:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 56 proven. 270 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 22:48:17,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097328941] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:48:17,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:48:17,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2023-04-01 22:48:17,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799584855] [2023-04-01 22:48:17,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:48:17,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 22:48:17,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:48:17,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 22:48:17,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-04-01 22:48:17,752 INFO L87 Difference]: Start difference. First operand 125267 states and 157787 transitions. Second operand has 25 states, 25 states have (on average 41.48) internal successors, (1037), 23 states have internal predecessors, (1037), 8 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-01 22:49:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:31,941 INFO L93 Difference]: Finished difference Result 553463 states and 740234 transitions. [2023-04-01 22:49:31,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2023-04-01 22:49:31,944 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 41.48) internal successors, (1037), 23 states have internal predecessors, (1037), 8 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) Word has length 398 [2023-04-01 22:49:31,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:34,188 INFO L225 Difference]: With dead ends: 553463 [2023-04-01 22:49:34,188 INFO L226 Difference]: Without dead ends: 416167 [2023-04-01 22:49:34,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1305 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39976 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=11033, Invalid=77473, Unknown=0, NotChecked=0, Total=88506 [2023-04-01 22:49:34,432 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 50976 mSDsluCounter, 3275 mSDsCounter, 0 mSdLazyCounter, 79696 mSolverCounterSat, 14195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50987 SdHoareTripleChecker+Valid, 3606 SdHoareTripleChecker+Invalid, 93891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 14195 IncrementalHoareTripleChecker+Valid, 79696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:34,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50987 Valid, 3606 Invalid, 93891 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [14195 Valid, 79696 Invalid, 0 Unknown, 0 Unchecked, 55.2s Time] [2023-04-01 22:49:34,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416167 states. [2023-04-01 22:49:40,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416167 to 266977. [2023-04-01 22:49:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266977 states, 261914 states have (on average 1.0839894011011248) internal successors, (283912), 263048 states have internal predecessors, (283912), 1298 states have call successors, (1298), 1298 states have call predecessors, (1298), 3764 states have return successors, (47096), 2630 states have call predecessors, (47096), 1297 states have call successors, (47096) [2023-04-01 22:49:42,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266977 states to 266977 states and 332306 transitions. [2023-04-01 22:49:42,301 INFO L78 Accepts]: Start accepts. Automaton has 266977 states and 332306 transitions. Word has length 398 [2023-04-01 22:49:42,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:42,302 INFO L495 AbstractCegarLoop]: Abstraction has 266977 states and 332306 transitions. [2023-04-01 22:49:42,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 41.48) internal successors, (1037), 23 states have internal predecessors, (1037), 8 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-01 22:49:42,302 INFO L276 IsEmpty]: Start isEmpty. Operand 266977 states and 332306 transitions. [2023-04-01 22:49:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2023-04-01 22:49:42,346 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:42,346 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:49:42,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 22:49:42,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:42,551 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:42,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:42,552 INFO L85 PathProgramCache]: Analyzing trace with hash 496302495, now seen corresponding path program 1 times [2023-04-01 22:49:42,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:42,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241371205] [2023-04-01 22:49:42,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:42,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:43,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:43,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:43,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:49:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:43,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:49:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:43,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2023-04-01 22:49:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 51 proven. 12 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2023-04-01 22:49:43,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:43,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241371205] [2023-04-01 22:49:43,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241371205] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:43,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414523308] [2023-04-01 22:49:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:43,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:43,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:49:43,957 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:49:44,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 22:49:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:44,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:49:44,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:49:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-04-01 22:49:44,304 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:49:44,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414523308] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:49:44,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:49:44,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2023-04-01 22:49:44,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055452841] [2023-04-01 22:49:44,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:49:44,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:49:44,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:44,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:49:44,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:49:44,307 INFO L87 Difference]: Start difference. First operand 266977 states and 332306 transitions. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 22:49:49,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:49,937 INFO L93 Difference]: Finished difference Result 506555 states and 632267 transitions. [2023-04-01 22:49:49,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:49:49,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 587 [2023-04-01 22:49:49,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:50,850 INFO L225 Difference]: With dead ends: 506555 [2023-04-01 22:49:50,851 INFO L226 Difference]: Without dead ends: 266921 [2023-04-01 22:49:51,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:49:51,112 INFO L413 NwaCegarLoop]: 1313 mSDtfsCounter, 1177 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 2716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:51,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1177 Valid, 1407 Invalid, 2716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2305 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 22:49:51,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266921 states. [2023-04-01 22:49:55,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266921 to 260489. [2023-04-01 22:49:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260489 states, 255515 states have (on average 1.0654403851045926) internal successors, (272236), 256638 states have internal predecessors, (272236), 1266 states have call successors, (1266), 1266 states have call predecessors, (1266), 3707 states have return successors, (35763), 2584 states have call predecessors, (35763), 1265 states have call successors, (35763) [2023-04-01 22:49:55,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260489 states to 260489 states and 309265 transitions. [2023-04-01 22:49:55,918 INFO L78 Accepts]: Start accepts. Automaton has 260489 states and 309265 transitions. Word has length 587 [2023-04-01 22:49:55,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:55,919 INFO L495 AbstractCegarLoop]: Abstraction has 260489 states and 309265 transitions. [2023-04-01 22:49:55,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 22:49:55,919 INFO L276 IsEmpty]: Start isEmpty. Operand 260489 states and 309265 transitions. [2023-04-01 22:49:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 707 [2023-04-01 22:49:55,937 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:55,937 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:49:55,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 22:49:56,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:56,142 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:56,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:56,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2096321326, now seen corresponding path program 1 times [2023-04-01 22:49:56,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:56,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530460052] [2023-04-01 22:49:56,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:56,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:56,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:57,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:57,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:49:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:57,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:49:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:57,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2023-04-01 22:49:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:57,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 528 [2023-04-01 22:49:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:57,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 615 [2023-04-01 22:49:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 301 proven. 164 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2023-04-01 22:49:57,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:57,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530460052] [2023-04-01 22:49:57,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530460052] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:57,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382549642] [2023-04-01 22:49:57,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:57,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:57,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:49:57,309 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:49:57,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 22:49:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:57,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:49:57,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:49:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 740 proven. 2 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-04-01 22:49:57,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:49:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 306 proven. 160 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-01 22:49:57,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382549642] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:49:57,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:49:57,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2023-04-01 22:49:57,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210573669] [2023-04-01 22:49:57,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:49:57,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 22:49:57,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:57,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 22:49:57,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-04-01 22:49:57,964 INFO L87 Difference]: Start difference. First operand 260489 states and 309265 transitions. Second operand has 14 states, 14 states have (on average 51.642857142857146) internal successors, (723), 12 states have internal predecessors, (723), 6 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-04-01 22:50:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:50:13,937 INFO L93 Difference]: Finished difference Result 597490 states and 718855 transitions. [2023-04-01 22:50:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 22:50:13,938 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 51.642857142857146) internal successors, (723), 12 states have internal predecessors, (723), 6 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 706 [2023-04-01 22:50:13,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:50:14,906 INFO L225 Difference]: With dead ends: 597490 [2023-04-01 22:50:14,906 INFO L226 Difference]: Without dead ends: 337810 [2023-04-01 22:50:15,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1466 GetRequests, 1436 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2023-04-01 22:50:15,207 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 9748 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 21578 mSolverCounterSat, 2940 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9748 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 24518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2940 IncrementalHoareTripleChecker+Valid, 21578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:50:15,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9748 Valid, 1153 Invalid, 24518 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2940 Valid, 21578 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2023-04-01 22:50:15,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337810 states.