/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:25:47,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:25:47,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:25:47,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 20:25:47,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 20:25:47,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 20:25:47,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 20:25:47,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 20:25:47,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 20:25:47,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 20:25:47,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 20:25:47,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 20:25:47,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 20:25:47,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 20:25:47,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 20:25:47,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 20:25:47,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 20:25:47,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:25:47,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:25:47,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:25:47,422 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 20:25:47,447 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:25:47,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:25:47,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:25:47,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:25:47,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:25:47,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:25:47,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:25:47,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:25:47,449 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:25:47,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:25:47,450 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:25:47,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:25:47,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:25:47,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:25:47,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:25:47,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:25:47,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:25:47,451 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:25:47,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:25:47,451 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:25:47,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:25:47,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:25:47,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:25:47,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:25:47,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:25:47,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:25:47,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:25:47,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:25:47,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:25:47,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:25:47,452 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:25:47,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:25:47,452 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:25:47,452 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:25:47,452 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:25:47,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:25:47,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:25:47,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:25:47,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:25:47,666 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:25:47,666 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:25:47,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label19.c [2023-04-01 20:25:48,652 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:25:48,962 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:25:48,962 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label19.c [2023-04-01 20:25:48,975 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7324d9949/909832f540514f3d9baf2e70db7a5b2b/FLAG2c5871de9 [2023-04-01 20:25:48,990 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7324d9949/909832f540514f3d9baf2e70db7a5b2b [2023-04-01 20:25:48,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:25:48,993 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:25:48,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:25:48,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:25:48,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:25:48,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:25:48" (1/1) ... [2023-04-01 20:25:48,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@182c63e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:48, skipping insertion in model container [2023-04-01 20:25:48,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:25:48" (1/1) ... [2023-04-01 20:25:49,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:25:49,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:25:49,411 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label19.c[59475,59488] [2023-04-01 20:25:49,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:25:49,445 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:25:49,610 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label19.c[59475,59488] [2023-04-01 20:25:49,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:25:49,632 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:25:49,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:49 WrapperNode [2023-04-01 20:25:49,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:25:49,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:25:49,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:25:49,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:25:49,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:49" (1/1) ... [2023-04-01 20:25:49,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:49" (1/1) ... [2023-04-01 20:25:49,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:49" (1/1) ... [2023-04-01 20:25:49,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:49" (1/1) ... [2023-04-01 20:25:49,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:49" (1/1) ... [2023-04-01 20:25:49,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:49" (1/1) ... [2023-04-01 20:25:49,755 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:49" (1/1) ... [2023-04-01 20:25:49,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:49" (1/1) ... [2023-04-01 20:25:49,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:25:49,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:25:49,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:25:49,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:25:49,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:49" (1/1) ... [2023-04-01 20:25:49,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:25:49,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:25:49,799 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 20:25:49,811 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 20:25:49,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:25:49,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:25:49,829 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:25:49,829 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 20:25:49,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:25:49,829 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 20:25:49,830 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:25:49,830 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:25:49,830 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:25:49,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:25:49,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:25:49,830 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 20:25:49,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:25:49,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:25:49,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:25:49,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:25:49,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:25:49,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:25:49,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:25:49,936 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:25:49,938 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:25:51,089 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:25:51,100 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:25:51,100 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 20:25:51,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:25:51 BoogieIcfgContainer [2023-04-01 20:25:51,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:25:51,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:25:51,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:25:51,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:25:51,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:25:48" (1/3) ... [2023-04-01 20:25:51,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5274bf53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:25:51, skipping insertion in model container [2023-04-01 20:25:51,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:25:49" (2/3) ... [2023-04-01 20:25:51,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5274bf53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:25:51, skipping insertion in model container [2023-04-01 20:25:51,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:25:51" (3/3) ... [2023-04-01 20:25:51,111 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label19.c [2023-04-01 20:25:51,126 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:25:51,126 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:25:51,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:25:51,180 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;@4a13d1d8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:25:51,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:25:51,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:25:51,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-04-01 20:25:51,200 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:25:51,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:25:51,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:25:51,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:25:51,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1422553007, now seen corresponding path program 1 times [2023-04-01 20:25:51,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:25:51,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257922476] [2023-04-01 20:25:51,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:25:51,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:25:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:52,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:25:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:52,639 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 20:25:52,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:25:52,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257922476] [2023-04-01 20:25:52,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257922476] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:25:52,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:25:52,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 20:25:52,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641144631] [2023-04-01 20:25:52,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:25:52,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:25:52,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:25:52,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:25:52,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:25:52,677 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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 20:25:54,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:25:54,361 INFO L93 Difference]: Finished difference Result 852 states and 1499 transitions. [2023-04-01 20:25:54,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:25:54,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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 193 [2023-04-01 20:25:54,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:25:54,372 INFO L225 Difference]: With dead ends: 852 [2023-04-01 20:25:54,372 INFO L226 Difference]: Without dead ends: 464 [2023-04-01 20:25:54,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:25:54,379 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 552 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:25:54,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 53 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 20:25:54,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2023-04-01 20:25:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 459. [2023-04-01 20:25:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 449 states have (on average 1.4142538975501113) internal successors, (635), 451 states have internal predecessors, (635), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:25:54,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 646 transitions. [2023-04-01 20:25:54,430 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 646 transitions. Word has length 193 [2023-04-01 20:25:54,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:25:54,430 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 646 transitions. [2023-04-01 20:25:54,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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 20:25:54,431 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 646 transitions. [2023-04-01 20:25:54,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-04-01 20:25:54,434 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:25:54,434 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:25:54,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:25:54,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:25:54,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:25:54,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1239485842, now seen corresponding path program 1 times [2023-04-01 20:25:54,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:25:54,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753910432] [2023-04-01 20:25:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:25:54,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:25:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:54,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:25:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:54,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:25:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:25:54,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:25:54,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753910432] [2023-04-01 20:25:54,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753910432] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:25:54,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:25:54,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:25:54,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966446393] [2023-04-01 20:25:54,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:25:54,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:25:54,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:25:54,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:25:54,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:25:54,858 INFO L87 Difference]: Start difference. First operand 459 states and 646 transitions. Second operand has 7 states, 6 states have (on average 33.166666666666664) internal successors, (199), 4 states have internal predecessors, (199), 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 20:25:56,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:25:56,551 INFO L93 Difference]: Finished difference Result 1390 states and 1984 transitions. [2023-04-01 20:25:56,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:25:56,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 33.166666666666664) internal successors, (199), 4 states have internal predecessors, (199), 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 205 [2023-04-01 20:25:56,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:25:56,556 INFO L225 Difference]: With dead ends: 1390 [2023-04-01 20:25:56,556 INFO L226 Difference]: Without dead ends: 937 [2023-04-01 20:25:56,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:25:56,558 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 781 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:25:56,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [781 Valid, 143 Invalid, 1808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 20:25:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2023-04-01 20:25:56,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 917. [2023-04-01 20:25:56,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 896 states have (on average 1.3828125) internal successors, (1239), 905 states have internal predecessors, (1239), 6 states have call successors, (6), 6 states have call predecessors, (6), 14 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2023-04-01 20:25:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1273 transitions. [2023-04-01 20:25:56,593 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1273 transitions. Word has length 205 [2023-04-01 20:25:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:25:56,593 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1273 transitions. [2023-04-01 20:25:56,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 33.166666666666664) internal successors, (199), 4 states have internal predecessors, (199), 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 20:25:56,594 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1273 transitions. [2023-04-01 20:25:56,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-04-01 20:25:56,598 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:25:56,598 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:25:56,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:25:56,598 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:25:56,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:25:56,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1997770330, now seen corresponding path program 1 times [2023-04-01 20:25:56,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:25:56,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141882155] [2023-04-01 20:25:56,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:25:56,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:25:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:57,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:25:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:57,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:25:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:25:57,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:25:57,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141882155] [2023-04-01 20:25:57,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141882155] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:25:57,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:25:57,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 20:25:57,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841088678] [2023-04-01 20:25:57,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:25:57,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:25:57,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:25:57,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:25:57,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:25:57,115 INFO L87 Difference]: Start difference. First operand 917 states and 1273 transitions. Second operand has 8 states, 7 states have (on average 29.0) internal successors, (203), 5 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:25:59,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:25:59,030 INFO L93 Difference]: Finished difference Result 3615 states and 5167 transitions. [2023-04-01 20:25:59,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 20:25:59,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 29.0) internal successors, (203), 5 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 209 [2023-04-01 20:25:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:25:59,042 INFO L225 Difference]: With dead ends: 3615 [2023-04-01 20:25:59,042 INFO L226 Difference]: Without dead ends: 2704 [2023-04-01 20:25:59,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:25:59,048 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2225 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2225 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:25:59,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2225 Valid, 125 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 20:25:59,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2023-04-01 20:25:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2672. [2023-04-01 20:25:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2604 states have (on average 1.30568356374808) internal successors, (3400), 2644 states have internal predecessors, (3400), 14 states have call successors, (14), 14 states have call predecessors, (14), 53 states have return successors, (161), 13 states have call predecessors, (161), 13 states have call successors, (161) [2023-04-01 20:25:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 3575 transitions. [2023-04-01 20:25:59,143 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 3575 transitions. Word has length 209 [2023-04-01 20:25:59,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:25:59,144 INFO L495 AbstractCegarLoop]: Abstraction has 2672 states and 3575 transitions. [2023-04-01 20:25:59,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 29.0) internal successors, (203), 5 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:25:59,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 3575 transitions. [2023-04-01 20:25:59,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-04-01 20:25:59,151 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:25:59,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:25:59,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 20:25:59,151 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:25:59,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:25:59,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1587294837, now seen corresponding path program 1 times [2023-04-01 20:25:59,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:25:59,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281412447] [2023-04-01 20:25:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:25:59,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:25:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:59,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:25:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:59,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:25:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:25:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:25:59,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:25:59,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281412447] [2023-04-01 20:25:59,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281412447] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:25:59,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:25:59,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 20:25:59,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377902472] [2023-04-01 20:25:59,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:25:59,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:25:59,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:25:59,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:25:59,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:25:59,648 INFO L87 Difference]: Start difference. First operand 2672 states and 3575 transitions. Second operand has 8 states, 7 states have (on average 29.142857142857142) internal successors, (204), 5 states have internal predecessors, (204), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:26:01,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:01,935 INFO L93 Difference]: Finished difference Result 10209 states and 14362 transitions. [2023-04-01 20:26:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 20:26:01,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 29.142857142857142) internal successors, (204), 5 states have internal predecessors, (204), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 210 [2023-04-01 20:26:01,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:01,967 INFO L225 Difference]: With dead ends: 10209 [2023-04-01 20:26:01,968 INFO L226 Difference]: Without dead ends: 7543 [2023-04-01 20:26:01,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:26:01,980 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1282 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:01,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1282 Valid, 138 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 20:26:01,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7543 states. [2023-04-01 20:26:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7543 to 7451. [2023-04-01 20:26:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7451 states, 7237 states have (on average 1.2534199253834462) internal successors, (9071), 7379 states have internal predecessors, (9071), 36 states have call successors, (36), 36 states have call predecessors, (36), 177 states have return successors, (726), 35 states have call predecessors, (726), 35 states have call successors, (726) [2023-04-01 20:26:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7451 states to 7451 states and 9833 transitions. [2023-04-01 20:26:02,189 INFO L78 Accepts]: Start accepts. Automaton has 7451 states and 9833 transitions. Word has length 210 [2023-04-01 20:26:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:02,190 INFO L495 AbstractCegarLoop]: Abstraction has 7451 states and 9833 transitions. [2023-04-01 20:26:02,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 29.142857142857142) internal successors, (204), 5 states have internal predecessors, (204), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:26:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 7451 states and 9833 transitions. [2023-04-01 20:26:02,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-04-01 20:26:02,202 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:02,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:26:02,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 20:26:02,202 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:02,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:02,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1270731075, now seen corresponding path program 1 times [2023-04-01 20:26:02,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:02,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483060124] [2023-04-01 20:26:02,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:02,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:03,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:03,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:03,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:03,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483060124] [2023-04-01 20:26:03,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483060124] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:03,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17416054] [2023-04-01 20:26:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:03,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:03,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:03,651 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 20:26:03,662 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 20:26:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:03,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:26:03,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:04,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:26:04,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17416054] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:04,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:26:04,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 20:26:04,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068459955] [2023-04-01 20:26:04,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:04,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:26:04,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:04,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:26:04,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:26:04,068 INFO L87 Difference]: Start difference. First operand 7451 states and 9833 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:26:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:04,756 INFO L93 Difference]: Finished difference Result 18564 states and 25513 transitions. [2023-04-01 20:26:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:26:04,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 214 [2023-04-01 20:26:04,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:04,795 INFO L225 Difference]: With dead ends: 18564 [2023-04-01 20:26:04,795 INFO L226 Difference]: Without dead ends: 11119 [2023-04-01 20:26:04,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:26:04,813 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 80 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:04,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 371 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:26:04,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2023-04-01 20:26:05,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 11084. [2023-04-01 20:26:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11084 states, 10784 states have (on average 1.258809347181009) internal successors, (13575), 10978 states have internal predecessors, (13575), 53 states have call successors, (53), 53 states have call predecessors, (53), 246 states have return successors, (1391), 52 states have call predecessors, (1391), 52 states have call successors, (1391) [2023-04-01 20:26:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11084 states to 11084 states and 15019 transitions. [2023-04-01 20:26:05,125 INFO L78 Accepts]: Start accepts. Automaton has 11084 states and 15019 transitions. Word has length 214 [2023-04-01 20:26:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:05,125 INFO L495 AbstractCegarLoop]: Abstraction has 11084 states and 15019 transitions. [2023-04-01 20:26:05,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 20:26:05,126 INFO L276 IsEmpty]: Start isEmpty. Operand 11084 states and 15019 transitions. [2023-04-01 20:26:05,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-04-01 20:26:05,144 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:05,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:05,153 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 20:26:05,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:05,351 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:05,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:05,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1828180915, now seen corresponding path program 1 times [2023-04-01 20:26:05,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:05,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558291630] [2023-04-01 20:26:05,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:05,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:05,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:05,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:05,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:26:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:26:05,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:05,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558291630] [2023-04-01 20:26:05,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558291630] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:05,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193987237] [2023-04-01 20:26:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:05,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:05,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:05,721 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 20:26:05,723 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 20:26:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:05,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:26:05,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:05,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:26:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:06,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193987237] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:26:06,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:26:06,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-04-01 20:26:06,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332225769] [2023-04-01 20:26:06,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:26:06,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 20:26:06,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:06,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 20:26:06,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:26:06,052 INFO L87 Difference]: Start difference. First operand 11084 states and 15019 transitions. Second operand has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 11 states have internal predecessors, (238), 5 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:26:08,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:08,976 INFO L93 Difference]: Finished difference Result 34681 states and 51582 transitions. [2023-04-01 20:26:08,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 20:26:08,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 11 states have internal predecessors, (238), 5 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 224 [2023-04-01 20:26:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:09,051 INFO L225 Difference]: With dead ends: 34681 [2023-04-01 20:26:09,052 INFO L226 Difference]: Without dead ends: 23603 [2023-04-01 20:26:09,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2023-04-01 20:26:09,073 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1026 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 2565 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 2565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:09,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 196 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 2565 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 20:26:09,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23603 states. [2023-04-01 20:26:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23603 to 23301. [2023-04-01 20:26:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23301 states, 22681 states have (on average 1.1724350778184383) internal successors, (26592), 23081 states have internal predecessors, (26592), 110 states have call successors, (110), 110 states have call predecessors, (110), 509 states have return successors, (3003), 109 states have call predecessors, (3003), 109 states have call successors, (3003) [2023-04-01 20:26:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23301 states to 23301 states and 29705 transitions. [2023-04-01 20:26:09,725 INFO L78 Accepts]: Start accepts. Automaton has 23301 states and 29705 transitions. Word has length 224 [2023-04-01 20:26:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:09,725 INFO L495 AbstractCegarLoop]: Abstraction has 23301 states and 29705 transitions. [2023-04-01 20:26:09,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 11 states have internal predecessors, (238), 5 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:26:09,726 INFO L276 IsEmpty]: Start isEmpty. Operand 23301 states and 29705 transitions. [2023-04-01 20:26:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-04-01 20:26:09,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:09,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:09,766 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 20:26:09,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 20:26:09,967 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:09,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:09,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1868325151, now seen corresponding path program 1 times [2023-04-01 20:26:09,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:09,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202733871] [2023-04-01 20:26:09,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:09,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:10,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:10,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:10,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:10,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202733871] [2023-04-01 20:26:10,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202733871] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:10,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:26:10,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:26:10,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732101952] [2023-04-01 20:26:10,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:10,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:26:10,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:10,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:26:10,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:26:10,707 INFO L87 Difference]: Start difference. First operand 23301 states and 29705 transitions. Second operand has 7 states, 6 states have (on average 36.5) internal successors, (219), 4 states have internal predecessors, (219), 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 20:26:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:12,598 INFO L93 Difference]: Finished difference Result 58028 states and 75941 transitions. [2023-04-01 20:26:12,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 20:26:12,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 36.5) internal successors, (219), 4 states have internal predecessors, (219), 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 225 [2023-04-01 20:26:12,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:12,696 INFO L225 Difference]: With dead ends: 58028 [2023-04-01 20:26:12,696 INFO L226 Difference]: Without dead ends: 34733 [2023-04-01 20:26:12,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:26:12,741 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1119 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:12,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1119 Valid, 142 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 20:26:12,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34733 states. [2023-04-01 20:26:13,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34733 to 34461. [2023-04-01 20:26:13,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34461 states, 33564 states have (on average 1.1680669765224645) internal successors, (39205), 34137 states have internal predecessors, (39205), 162 states have call successors, (162), 162 states have call predecessors, (162), 734 states have return successors, (4772), 161 states have call predecessors, (4772), 161 states have call successors, (4772) [2023-04-01 20:26:13,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34461 states to 34461 states and 44139 transitions. [2023-04-01 20:26:13,497 INFO L78 Accepts]: Start accepts. Automaton has 34461 states and 44139 transitions. Word has length 225 [2023-04-01 20:26:13,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:13,497 INFO L495 AbstractCegarLoop]: Abstraction has 34461 states and 44139 transitions. [2023-04-01 20:26:13,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 36.5) internal successors, (219), 4 states have internal predecessors, (219), 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 20:26:13,497 INFO L276 IsEmpty]: Start isEmpty. Operand 34461 states and 44139 transitions. [2023-04-01 20:26:13,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-04-01 20:26:13,544 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:13,545 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:13,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 20:26:13,545 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:13,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:13,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1995996519, now seen corresponding path program 1 times [2023-04-01 20:26:13,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:13,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908403898] [2023-04-01 20:26:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:13,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:14,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:14,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:14,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:26:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:26:14,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908403898] [2023-04-01 20:26:14,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908403898] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:14,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016405764] [2023-04-01 20:26:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:14,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:14,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:14,335 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 20:26:14,337 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 20:26:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:14,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 20:26:14,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:14,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:26:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 41 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:15,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016405764] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:26:15,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:26:15,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-04-01 20:26:15,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908844071] [2023-04-01 20:26:15,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:26:15,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 20:26:15,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:15,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 20:26:15,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-04-01 20:26:15,018 INFO L87 Difference]: Start difference. First operand 34461 states and 44139 transitions. Second operand has 18 states, 18 states have (on average 16.38888888888889) internal successors, (295), 15 states have internal predecessors, (295), 5 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:26:22,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:22,190 INFO L93 Difference]: Finished difference Result 118654 states and 157031 transitions. [2023-04-01 20:26:22,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-04-01 20:26:22,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 16.38888888888889) internal successors, (295), 15 states have internal predecessors, (295), 5 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 236 [2023-04-01 20:26:22,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:22,445 INFO L225 Difference]: With dead ends: 118654 [2023-04-01 20:26:22,445 INFO L226 Difference]: Without dead ends: 84196 [2023-04-01 20:26:22,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 466 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3263 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1471, Invalid=7841, Unknown=0, NotChecked=0, Total=9312 [2023-04-01 20:26:22,506 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 3677 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 4104 mSolverCounterSat, 1401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3677 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 5505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1401 IncrementalHoareTripleChecker+Valid, 4104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:22,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3677 Valid, 420 Invalid, 5505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1401 Valid, 4104 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 20:26:22,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84196 states. [2023-04-01 20:26:24,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84196 to 83000. [2023-04-01 20:26:24,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83000 states, 81044 states have (on average 1.1416020926903905) internal successors, (92520), 82220 states have internal predecessors, (92520), 390 states have call successors, (390), 390 states have call predecessors, (390), 1565 states have return successors, (10031), 389 states have call predecessors, (10031), 389 states have call successors, (10031) [2023-04-01 20:26:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83000 states to 83000 states and 102941 transitions. [2023-04-01 20:26:24,585 INFO L78 Accepts]: Start accepts. Automaton has 83000 states and 102941 transitions. Word has length 236 [2023-04-01 20:26:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:24,585 INFO L495 AbstractCegarLoop]: Abstraction has 83000 states and 102941 transitions. [2023-04-01 20:26:24,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 16.38888888888889) internal successors, (295), 15 states have internal predecessors, (295), 5 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:26:24,585 INFO L276 IsEmpty]: Start isEmpty. Operand 83000 states and 102941 transitions. [2023-04-01 20:26:24,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2023-04-01 20:26:24,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:24,838 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:26:24,849 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 20:26:25,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:25,044 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:25,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:25,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1134784020, now seen corresponding path program 1 times [2023-04-01 20:26:25,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:25,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338562813] [2023-04-01 20:26:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:25,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:25,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:25,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:25,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:26:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:26:25,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:25,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338562813] [2023-04-01 20:26:25,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338562813] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:25,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387830822] [2023-04-01 20:26:25,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:25,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:25,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:25,584 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 20:26:25,587 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 20:26:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:25,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:26:25,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:26:25,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:26:25,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387830822] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:25,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:26:25,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 20:26:25,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135305779] [2023-04-01 20:26:25,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:25,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:26:25,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:25,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:26:25,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:26:25,972 INFO L87 Difference]: Start difference. First operand 83000 states and 102941 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:26:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:27,340 INFO L93 Difference]: Finished difference Result 164536 states and 204170 transitions. [2023-04-01 20:26:27,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:26:27,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 238 [2023-04-01 20:26:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:27,633 INFO L225 Difference]: With dead ends: 164536 [2023-04-01 20:26:27,633 INFO L226 Difference]: Without dead ends: 81542 [2023-04-01 20:26:27,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:26:27,687 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 50 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:27,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 402 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:26:27,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81542 states. [2023-04-01 20:26:28,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81542 to 81509. [2023-04-01 20:26:28,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81509 states, 79588 states have (on average 1.136264260943861) internal successors, (90433), 80743 states have internal predecessors, (90433), 383 states have call successors, (383), 383 states have call predecessors, (383), 1537 states have return successors, (9470), 382 states have call predecessors, (9470), 382 states have call successors, (9470) [2023-04-01 20:26:29,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81509 states to 81509 states and 100286 transitions. [2023-04-01 20:26:29,288 INFO L78 Accepts]: Start accepts. Automaton has 81509 states and 100286 transitions. Word has length 238 [2023-04-01 20:26:29,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:29,294 INFO L495 AbstractCegarLoop]: Abstraction has 81509 states and 100286 transitions. [2023-04-01 20:26:29,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:26:29,294 INFO L276 IsEmpty]: Start isEmpty. Operand 81509 states and 100286 transitions. [2023-04-01 20:26:29,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-04-01 20:26:29,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:29,347 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:26:29,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 20:26:29,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:29,555 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:29,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:29,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1044732111, now seen corresponding path program 1 times [2023-04-01 20:26:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:29,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013122853] [2023-04-01 20:26:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:29,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:29,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:30,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:30,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:26:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:30,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 20:26:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 66 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 20:26:30,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:30,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013122853] [2023-04-01 20:26:30,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013122853] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:30,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807731622] [2023-04-01 20:26:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:30,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:30,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:30,120 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 20:26:30,120 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 20:26:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:30,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 1244 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:26:30,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-01 20:26:30,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:26:30,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807731622] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:30,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:26:30,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 20:26:30,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345947981] [2023-04-01 20:26:30,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:30,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:26:30,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:30,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:26:30,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:26:30,535 INFO L87 Difference]: Start difference. First operand 81509 states and 100286 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:26:32,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:32,238 INFO L93 Difference]: Finished difference Result 202738 states and 251139 transitions. [2023-04-01 20:26:32,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:26:32,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 248 [2023-04-01 20:26:32,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:32,564 INFO L225 Difference]: With dead ends: 202738 [2023-04-01 20:26:32,564 INFO L226 Difference]: Without dead ends: 121235 [2023-04-01 20:26:32,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:26:32,652 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 61 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:32,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 223 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:26:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121235 states. [2023-04-01 20:26:34,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121235 to 113225. [2023-04-01 20:26:34,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113225 states, 110880 states have (on average 1.1399531024531024) internal successors, (126398), 112155 states have internal predecessors, (126398), 535 states have call successors, (535), 535 states have call predecessors, (535), 1809 states have return successors, (13913), 534 states have call predecessors, (13913), 534 states have call successors, (13913) [2023-04-01 20:26:34,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113225 states to 113225 states and 140846 transitions. [2023-04-01 20:26:34,958 INFO L78 Accepts]: Start accepts. Automaton has 113225 states and 140846 transitions. Word has length 248 [2023-04-01 20:26:34,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:34,959 INFO L495 AbstractCegarLoop]: Abstraction has 113225 states and 140846 transitions. [2023-04-01 20:26:34,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:26:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand 113225 states and 140846 transitions. [2023-04-01 20:26:35,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-04-01 20:26:35,038 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:35,038 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:26:35,044 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 20:26:35,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 20:26:35,239 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:35,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:35,239 INFO L85 PathProgramCache]: Analyzing trace with hash -657518006, now seen corresponding path program 1 times [2023-04-01 20:26:35,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:35,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129752169] [2023-04-01 20:26:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:35,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:35,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:35,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:35,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:26:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:35,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 20:26:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 64 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:26:35,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:35,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129752169] [2023-04-01 20:26:35,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129752169] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:35,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954838267] [2023-04-01 20:26:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:35,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:35,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:35,866 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 20:26:35,867 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 20:26:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:36,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:26:36,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 20:26:36,258 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:26:36,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954838267] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:36,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:26:36,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 20:26:36,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22116971] [2023-04-01 20:26:36,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:36,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:26:36,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:36,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:26:36,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:26:36,259 INFO L87 Difference]: Start difference. First operand 113225 states and 140846 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:26:38,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:38,005 INFO L93 Difference]: Finished difference Result 226231 states and 281480 transitions. [2023-04-01 20:26:38,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:26:38,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 248 [2023-04-01 20:26:38,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:38,290 INFO L225 Difference]: With dead ends: 226231 [2023-04-01 20:26:38,290 INFO L226 Difference]: Without dead ends: 113012 [2023-04-01 20:26:38,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:26:38,384 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 82 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:38,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 364 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:26:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113012 states. [2023-04-01 20:26:40,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113012 to 112385. [2023-04-01 20:26:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112385 states, 110051 states have (on average 1.131611707299343) internal successors, (124535), 111323 states have internal predecessors, (124535), 531 states have call successors, (531), 531 states have call predecessors, (531), 1802 states have return successors, (12866), 530 states have call predecessors, (12866), 530 states have call successors, (12866) [2023-04-01 20:26:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112385 states to 112385 states and 137932 transitions. [2023-04-01 20:26:41,007 INFO L78 Accepts]: Start accepts. Automaton has 112385 states and 137932 transitions. Word has length 248 [2023-04-01 20:26:41,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:41,008 INFO L495 AbstractCegarLoop]: Abstraction has 112385 states and 137932 transitions. [2023-04-01 20:26:41,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:26:41,008 INFO L276 IsEmpty]: Start isEmpty. Operand 112385 states and 137932 transitions. [2023-04-01 20:26:41,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2023-04-01 20:26:41,100 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:41,101 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:26:41,109 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 20:26:41,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:41,308 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:41,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:41,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1303490724, now seen corresponding path program 1 times [2023-04-01 20:26:41,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:41,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035359264] [2023-04-01 20:26:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:41,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:41,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:41,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:41,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:26:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:41,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 20:26:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 88 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 20:26:41,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:41,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035359264] [2023-04-01 20:26:41,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035359264] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:41,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998376739] [2023-04-01 20:26:41,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:41,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:41,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:41,906 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 20:26:41,906 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 20:26:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:42,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:26:42,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:26:42,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:26:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:26:42,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998376739] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:26:42,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:26:42,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:26:42,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302009883] [2023-04-01 20:26:42,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:26:42,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:26:42,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:42,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:26:42,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:26:42,283 INFO L87 Difference]: Start difference. First operand 112385 states and 137932 transitions. Second operand has 12 states, 12 states have (on average 25.666666666666668) internal successors, (308), 10 states have internal predecessors, (308), 4 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 20:26:57,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:57,530 INFO L93 Difference]: Finished difference Result 460557 states and 684327 transitions. [2023-04-01 20:26:57,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-01 20:26:57,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 25.666666666666668) internal successors, (308), 10 states have internal predecessors, (308), 4 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 270 [2023-04-01 20:26:57,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:59,607 INFO L225 Difference]: With dead ends: 460557 [2023-04-01 20:26:59,608 INFO L226 Difference]: Without dead ends: 348178 [2023-04-01 20:26:59,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 580 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=494, Invalid=2368, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 20:26:59,821 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 2654 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 8965 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2667 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 9654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 8965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:59,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2667 Valid, 469 Invalid, 9654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 8965 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-04-01 20:27:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348178 states. [2023-04-01 20:27:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348178 to 331099. [2023-04-01 20:27:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331099 states, 323776 states have (on average 1.1193479442577585) internal successors, (362418), 327595 states have internal predecessors, (362418), 1951 states have call successors, (1951), 1553 states have call predecessors, (1951), 5371 states have return successors, (48494), 1950 states have call predecessors, (48494), 1950 states have call successors, (48494) [2023-04-01 20:27:10,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331099 states to 331099 states and 412863 transitions. [2023-04-01 20:27:10,613 INFO L78 Accepts]: Start accepts. Automaton has 331099 states and 412863 transitions. Word has length 270 [2023-04-01 20:27:10,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:10,613 INFO L495 AbstractCegarLoop]: Abstraction has 331099 states and 412863 transitions. [2023-04-01 20:27:10,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.666666666666668) internal successors, (308), 10 states have internal predecessors, (308), 4 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 20:27:10,613 INFO L276 IsEmpty]: Start isEmpty. Operand 331099 states and 412863 transitions. [2023-04-01 20:27:10,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2023-04-01 20:27:10,881 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:10,882 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:27:10,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 20:27:11,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:11,082 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:11,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:11,083 INFO L85 PathProgramCache]: Analyzing trace with hash 222197855, now seen corresponding path program 1 times [2023-04-01 20:27:11,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:11,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768697335] [2023-04-01 20:27:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:11,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:11,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:11,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:12,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:27:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:12,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-04-01 20:27:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:12,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-04-01 20:27:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 125 proven. 71 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-01 20:27:12,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:12,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768697335] [2023-04-01 20:27:12,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768697335] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:12,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134872133] [2023-04-01 20:27:12,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:12,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:12,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:12,116 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:27:12,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 20:27:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:12,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:27:12,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 193 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-01 20:27:12,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:27:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 193 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-01 20:27:12,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134872133] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:27:12,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:27:12,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2023-04-01 20:27:12,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158050427] [2023-04-01 20:27:12,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:27:12,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:27:12,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:12,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:27:12,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:27:12,739 INFO L87 Difference]: Start difference. First operand 331099 states and 412863 transitions. Second operand has 15 states, 15 states have (on average 29.066666666666666) internal successors, (436), 13 states have internal predecessors, (436), 5 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 20:28:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:28:11,211 INFO L93 Difference]: Finished difference Result 1225750 states and 1946037 transitions. [2023-04-01 20:28:11,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2023-04-01 20:28:11,212 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 29.066666666666666) internal successors, (436), 13 states have internal predecessors, (436), 5 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 323 [2023-04-01 20:28:11,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:28:21,117 INFO L225 Difference]: With dead ends: 1225750 [2023-04-01 20:28:21,117 INFO L226 Difference]: Without dead ends: 895575 [2023-04-01 20:28:22,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 768 SyntacticMatches, 3 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12279 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2838, Invalid=27264, Unknown=0, NotChecked=0, Total=30102 [2023-04-01 20:28:22,424 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 4681 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 30388 mSolverCounterSat, 790 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4692 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 31178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 790 IncrementalHoareTripleChecker+Valid, 30388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:28:22,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4692 Valid, 1779 Invalid, 31178 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [790 Valid, 30388 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time] [2023-04-01 20:28:23,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895575 states.