/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_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:46:54,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:46:54,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:46:54,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:46:54,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:46:54,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:46:54,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:46:54,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:46:54,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:46:54,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:46:54,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:46:54,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:46:54,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:46:54,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:46:54,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:46:54,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:46:54,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 22:46:54,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:46:54,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:46:54,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:46:54,532 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 22:46:54,561 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:46:54,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:46:54,561 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:46:54,561 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:46:54,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:46:54,563 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:46:54,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:46:54,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:46:54,563 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:46:54,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:46:54,564 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:46:54,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:46:54,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:46:54,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:46:54,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:46:54,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:46:54,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:46:54,565 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:46:54,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:46:54,565 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:46:54,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:46:54,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:46:54,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:46:54,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:46:54,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:46:54,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:46:54,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:46:54,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:46:54,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:46:54,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:46:54,567 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:46:54,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:46:54,567 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:46:54,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:46:54,568 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:46:54,568 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:46:54,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:46:54,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:46:54,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:46:54,804 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:46:54,806 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:46:54,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label50.c [2023-03-30 22:46:56,039 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:46:56,405 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:46:56,406 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label50.c [2023-03-30 22:46:56,423 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d769362b0/d3c51a0a95e84d5cac06bc5cb465a501/FLAGeff78d273 [2023-03-30 22:46:56,438 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d769362b0/d3c51a0a95e84d5cac06bc5cb465a501 [2023-03-30 22:46:56,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:46:56,443 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:46:56,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:46:56,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:46:56,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:46:56,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:46:56" (1/1) ... [2023-03-30 22:46:56,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790b1beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:46:56, skipping insertion in model container [2023-03-30 22:46:56,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:46:56" (1/1) ... [2023-03-30 22:46:56,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:46:56,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:46:57,050 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_label50.c[55003,55016] [2023-03-30 22:46:57,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:46:57,097 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:46:57,268 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_label50.c[55003,55016] [2023-03-30 22:46:57,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:46:57,301 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:46:57,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:46:57 WrapperNode [2023-03-30 22:46:57,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:46:57,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:46:57,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:46:57,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:46:57,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:46:57" (1/1) ... [2023-03-30 22:46:57,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:46:57" (1/1) ... [2023-03-30 22:46:57,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:46:57" (1/1) ... [2023-03-30 22:46:57,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:46:57" (1/1) ... [2023-03-30 22:46:57,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:46:57" (1/1) ... [2023-03-30 22:46:57,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:46:57" (1/1) ... [2023-03-30 22:46:57,455 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:46:57" (1/1) ... [2023-03-30 22:46:57,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:46:57" (1/1) ... [2023-03-30 22:46:57,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:46:57,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:46:57,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:46:57,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:46:57,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:46:57" (1/1) ... [2023-03-30 22:46:57,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:46:57,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:46:57,530 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 22:46:57,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 22:46:57,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:46:57,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:46:57,568 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:46:57,569 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 22:46:57,569 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:46:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 22:46:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:46:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:46:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:46:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:46:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:46:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 22:46:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:46:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:46:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:46:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:46:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:46:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:46:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:46:57,671 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:46:57,673 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:46:59,244 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:46:59,261 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:46:59,261 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 22:46:59,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:46:59 BoogieIcfgContainer [2023-03-30 22:46:59,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:46:59,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:46:59,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:46:59,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:46:59,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:46:56" (1/3) ... [2023-03-30 22:46:59,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795f242c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:46:59, skipping insertion in model container [2023-03-30 22:46:59,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:46:57" (2/3) ... [2023-03-30 22:46:59,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795f242c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:46:59, skipping insertion in model container [2023-03-30 22:46:59,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:46:59" (3/3) ... [2023-03-30 22:46:59,272 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label50.c [2023-03-30 22:46:59,288 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:46:59,288 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:46:59,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:46:59,341 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;@17e8aa74, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:46:59,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:46:59,350 INFO L276 IsEmpty]: Start isEmpty. Operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:46:59,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-03-30 22:46:59,369 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:46:59,370 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] [2023-03-30 22:46:59,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:46:59,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:46:59,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2070277178, now seen corresponding path program 1 times [2023-03-30 22:46:59,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:46:59,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835417192] [2023-03-30 22:46:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:46:59,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:46:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:00,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:47:00,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:00,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835417192] [2023-03-30 22:47:00,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835417192] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:47:00,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:47:00,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:47:00,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570310612] [2023-03-30 22:47:00,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:47:00,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:47:00,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:00,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:47:00,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:47:00,681 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 52.0) internal successors, (156), 2 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:47:02,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:47:02,795 INFO L93 Difference]: Finished difference Result 858 states and 1518 transitions. [2023-03-30 22:47:02,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:47:02,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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 160 [2023-03-30 22:47:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:47:02,810 INFO L225 Difference]: With dead ends: 858 [2023-03-30 22:47:02,810 INFO L226 Difference]: Without dead ends: 483 [2023-03-30 22:47:02,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:47:02,818 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 677 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:47:02,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 54 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-30 22:47:02,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-03-30 22:47:02,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 465. [2023-03-30 22:47:02,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 455 states have (on average 1.6087912087912088) internal successors, (732), 457 states have internal predecessors, (732), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 22:47:02,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 743 transitions. [2023-03-30 22:47:02,887 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 743 transitions. Word has length 160 [2023-03-30 22:47:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:47:02,888 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 743 transitions. [2023-03-30 22:47:02,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:47:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 743 transitions. [2023-03-30 22:47:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-03-30 22:47:02,892 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:47:02,892 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 22:47:02,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:47:02,893 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:47:02,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:47:02,893 INFO L85 PathProgramCache]: Analyzing trace with hash -930017242, now seen corresponding path program 1 times [2023-03-30 22:47:02,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:47:02,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888796380] [2023-03-30 22:47:02,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:02,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:47:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:03,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:03,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:47:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:47:03,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:03,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888796380] [2023-03-30 22:47:03,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888796380] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:47:03,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:47:03,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:47:03,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111605793] [2023-03-30 22:47:03,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:47:03,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:47:03,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:03,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:47:03,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:47:03,485 INFO L87 Difference]: Start difference. First operand 465 states and 743 transitions. Second operand has 7 states, 6 states have (on average 27.166666666666668) internal successors, (163), 4 states have internal predecessors, (163), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:47:05,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:47:05,354 INFO L93 Difference]: Finished difference Result 1396 states and 2264 transitions. [2023-03-30 22:47:05,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:47:05,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 27.166666666666668) internal successors, (163), 4 states have internal predecessors, (163), 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 169 [2023-03-30 22:47:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:47:05,363 INFO L225 Difference]: With dead ends: 1396 [2023-03-30 22:47:05,363 INFO L226 Difference]: Without dead ends: 937 [2023-03-30 22:47:05,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:47:05,372 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1304 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:47:05,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1304 Valid, 122 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 22:47:05,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2023-03-30 22:47:05,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 916. [2023-03-30 22:47:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 896 states have (on average 1.5212053571428572) internal successors, (1363), 904 states have internal predecessors, (1363), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-03-30 22:47:05,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1394 transitions. [2023-03-30 22:47:05,448 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1394 transitions. Word has length 169 [2023-03-30 22:47:05,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:47:05,454 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1394 transitions. [2023-03-30 22:47:05,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 27.166666666666668) internal successors, (163), 4 states have internal predecessors, (163), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:47:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1394 transitions. [2023-03-30 22:47:05,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-03-30 22:47:05,462 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:47:05,462 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] [2023-03-30 22:47:05,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:47:05,462 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:47:05,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:47:05,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1913854570, now seen corresponding path program 1 times [2023-03-30 22:47:05,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:47:05,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489690155] [2023-03-30 22:47:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:05,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:47:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:05,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:06,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:47:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:47:06,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:06,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489690155] [2023-03-30 22:47:06,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489690155] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:47:06,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:47:06,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:47:06,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086159200] [2023-03-30 22:47:06,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:47:06,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:47:06,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:06,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:47:06,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:47:06,062 INFO L87 Difference]: Start difference. First operand 916 states and 1394 transitions. Second operand has 7 states, 6 states have (on average 28.5) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:47:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:47:07,074 INFO L93 Difference]: Finished difference Result 1801 states and 2774 transitions. [2023-03-30 22:47:07,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:47:07,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 28.5) internal successors, (171), 4 states have internal predecessors, (171), 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 177 [2023-03-30 22:47:07,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:47:07,081 INFO L225 Difference]: With dead ends: 1801 [2023-03-30 22:47:07,081 INFO L226 Difference]: Without dead ends: 891 [2023-03-30 22:47:07,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:47:07,091 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 903 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:47:07,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [903 Valid, 43 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 22:47:07,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2023-03-30 22:47:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 887. [2023-03-30 22:47:07,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 867 states have (on average 1.467128027681661) internal successors, (1272), 875 states have internal predecessors, (1272), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-03-30 22:47:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1303 transitions. [2023-03-30 22:47:07,136 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1303 transitions. Word has length 177 [2023-03-30 22:47:07,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:47:07,136 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1303 transitions. [2023-03-30 22:47:07,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 28.5) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:47:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1303 transitions. [2023-03-30 22:47:07,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-03-30 22:47:07,176 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:47:07,176 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-03-30 22:47:07,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 22:47:07,176 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:47:07,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:47:07,177 INFO L85 PathProgramCache]: Analyzing trace with hash 212576770, now seen corresponding path program 1 times [2023-03-30 22:47:07,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:47:07,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769475775] [2023-03-30 22:47:07,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:07,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:47:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:07,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:07,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:47:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:07,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-03-30 22:47:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:47:07,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:07,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769475775] [2023-03-30 22:47:07,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769475775] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:47:07,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694634226] [2023-03-30 22:47:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:07,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:47:07,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:47:07,804 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:47:07,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:47:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:08,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:47:08,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:47:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-30 22:47:08,296 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:47:08,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694634226] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:47:08,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:47:08,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-30 22:47:08,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241429077] [2023-03-30 22:47:08,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:47:08,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:47:08,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:08,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:47:08,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:47:08,299 INFO L87 Difference]: Start difference. First operand 887 states and 1303 transitions. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:47:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:47:09,232 INFO L93 Difference]: Finished difference Result 2694 states and 4113 transitions. [2023-03-30 22:47:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:47:09,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 182 [2023-03-30 22:47:09,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:47:09,242 INFO L225 Difference]: With dead ends: 2694 [2023-03-30 22:47:09,242 INFO L226 Difference]: Without dead ends: 1813 [2023-03-30 22:47:09,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:47:09,245 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 745 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:47:09,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 109 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 22:47:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2023-03-30 22:47:09,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1771. [2023-03-30 22:47:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1726 states have (on average 1.399768250289687) internal successors, (2416), 1751 states have internal predecessors, (2416), 10 states have call successors, (10), 10 states have call predecessors, (10), 34 states have return successors, (113), 9 states have call predecessors, (113), 9 states have call successors, (113) [2023-03-30 22:47:09,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2539 transitions. [2023-03-30 22:47:09,314 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2539 transitions. Word has length 182 [2023-03-30 22:47:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:47:09,314 INFO L495 AbstractCegarLoop]: Abstraction has 1771 states and 2539 transitions. [2023-03-30 22:47:09,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:47:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2539 transitions. [2023-03-30 22:47:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-03-30 22:47:09,320 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:47:09,320 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-03-30 22:47:09,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 22:47:09,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:47:09,531 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:47:09,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:47:09,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2018365643, now seen corresponding path program 1 times [2023-03-30 22:47:09,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:47:09,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264457957] [2023-03-30 22:47:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:09,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:47:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:10,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:10,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:47:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:10,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:47:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:47:10,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:10,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264457957] [2023-03-30 22:47:10,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264457957] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:47:10,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167319349] [2023-03-30 22:47:10,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:10,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:47:10,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:47:10,603 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:47:10,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:47:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:10,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:47:10,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:47:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 22:47:10,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:47:10,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167319349] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:47:10,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:47:10,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-30 22:47:10,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593564395] [2023-03-30 22:47:10,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:47:10,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:47:10,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:10,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:47:10,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:47:10,944 INFO L87 Difference]: Start difference. First operand 1771 states and 2539 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:47:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:47:11,367 INFO L93 Difference]: Finished difference Result 5361 states and 7960 transitions. [2023-03-30 22:47:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:47:11,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 183 [2023-03-30 22:47:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:47:11,389 INFO L225 Difference]: With dead ends: 5361 [2023-03-30 22:47:11,389 INFO L226 Difference]: Without dead ends: 3596 [2023-03-30 22:47:11,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:47:11,395 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 976 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:47:11,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 820 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:47:11,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2023-03-30 22:47:11,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 3558. [2023-03-30 22:47:11,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 3452 states have (on average 1.3980301274623406) internal successors, (4826), 3522 states have internal predecessors, (4826), 18 states have call successors, (18), 18 states have call predecessors, (18), 87 states have return successors, (353), 17 states have call predecessors, (353), 17 states have call successors, (353) [2023-03-30 22:47:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 5197 transitions. [2023-03-30 22:47:11,575 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 5197 transitions. Word has length 183 [2023-03-30 22:47:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:47:11,575 INFO L495 AbstractCegarLoop]: Abstraction has 3558 states and 5197 transitions. [2023-03-30 22:47:11,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:47:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 5197 transitions. [2023-03-30 22:47:11,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-03-30 22:47:11,584 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:47:11,584 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 22:47:11,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-30 22:47:11,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:47:11,792 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:47:11,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:47:11,792 INFO L85 PathProgramCache]: Analyzing trace with hash -101180185, now seen corresponding path program 1 times [2023-03-30 22:47:11,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:47:11,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910557105] [2023-03-30 22:47:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:11,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:47:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:12,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:12,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:47:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:12,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:47:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:47:12,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:12,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910557105] [2023-03-30 22:47:12,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910557105] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:47:12,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306839091] [2023-03-30 22:47:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:12,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:47:12,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:47:12,882 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:47:12,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:47:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:13,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:47:13,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:47:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:47:13,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:47:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:47:13,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306839091] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:47:13,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:47:13,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 22:47:13,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361906200] [2023-03-30 22:47:13,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:47:13,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:47:13,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:13,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:47:13,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:47:13,325 INFO L87 Difference]: Start difference. First operand 3558 states and 5197 transitions. Second operand has 12 states, 12 states have (on average 16.666666666666668) internal successors, (200), 10 states have internal predecessors, (200), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 22:47:19,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:47:19,962 INFO L93 Difference]: Finished difference Result 19866 states and 34886 transitions. [2023-03-30 22:47:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-03-30 22:47:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.666666666666668) internal successors, (200), 10 states have internal predecessors, (200), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 185 [2023-03-30 22:47:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:47:20,092 INFO L225 Difference]: With dead ends: 19866 [2023-03-30 22:47:20,092 INFO L226 Difference]: Without dead ends: 16314 [2023-03-30 22:47:20,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 400 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=376, Invalid=1604, Unknown=0, NotChecked=0, Total=1980 [2023-03-30 22:47:20,117 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5112 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4688 mSolverCounterSat, 1061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5116 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 5749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1061 IncrementalHoareTripleChecker+Valid, 4688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:47:20,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5116 Valid, 216 Invalid, 5749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1061 Valid, 4688 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-03-30 22:47:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16314 states. [2023-03-30 22:47:20,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16314 to 15868. [2023-03-30 22:47:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15868 states, 15336 states have (on average 1.2801251956181534) internal successors, (19632), 15706 states have internal predecessors, (19632), 88 states have call successors, (88), 74 states have call predecessors, (88), 443 states have return successors, (3278), 87 states have call predecessors, (3278), 87 states have call successors, (3278) [2023-03-30 22:47:20,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15868 states to 15868 states and 22998 transitions. [2023-03-30 22:47:20,966 INFO L78 Accepts]: Start accepts. Automaton has 15868 states and 22998 transitions. Word has length 185 [2023-03-30 22:47:20,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:47:20,969 INFO L495 AbstractCegarLoop]: Abstraction has 15868 states and 22998 transitions. [2023-03-30 22:47:20,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.666666666666668) internal successors, (200), 10 states have internal predecessors, (200), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 22:47:20,969 INFO L276 IsEmpty]: Start isEmpty. Operand 15868 states and 22998 transitions. [2023-03-30 22:47:21,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-03-30 22:47:21,007 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:47:21,007 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:47:21,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:47:21,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:47:21,215 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:47:21,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:47:21,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1308389011, now seen corresponding path program 1 times [2023-03-30 22:47:21,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:47:21,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492266185] [2023-03-30 22:47:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:21,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:47:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:21,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:21,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:47:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:21,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-03-30 22:47:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:21,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-03-30 22:47:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-30 22:47:21,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:21,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492266185] [2023-03-30 22:47:21,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492266185] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:47:21,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848228571] [2023-03-30 22:47:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:21,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:47:21,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:47:21,953 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:47:21,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:47:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:22,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:47:22,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:47:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-03-30 22:47:22,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:47:22,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848228571] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:47:22,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:47:22,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-03-30 22:47:22,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959150631] [2023-03-30 22:47:22,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:47:22,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:47:22,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:22,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:47:22,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:47:22,348 INFO L87 Difference]: Start difference. First operand 15868 states and 22998 transitions. Second operand has 5 states, 5 states have (on average 35.2) internal successors, (176), 4 states have internal predecessors, (176), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:47:23,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:47:23,740 INFO L93 Difference]: Finished difference Result 42082 states and 62991 transitions. [2023-03-30 22:47:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:47:23,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 4 states have internal predecessors, (176), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 206 [2023-03-30 22:47:23,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:47:23,859 INFO L225 Difference]: With dead ends: 42082 [2023-03-30 22:47:23,860 INFO L226 Difference]: Without dead ends: 26276 [2023-03-30 22:47:23,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:47:23,909 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 655 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:47:23,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 94 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 22:47:23,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26276 states. [2023-03-30 22:47:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26276 to 26120. [2023-03-30 22:47:24,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26120 states, 25334 states have (on average 1.2241256809031342) internal successors, (31012), 25862 states have internal predecessors, (31012), 136 states have call successors, (136), 122 states have call predecessors, (136), 649 states have return successors, (4496), 135 states have call predecessors, (4496), 135 states have call successors, (4496) [2023-03-30 22:47:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26120 states to 26120 states and 35644 transitions. [2023-03-30 22:47:24,966 INFO L78 Accepts]: Start accepts. Automaton has 26120 states and 35644 transitions. Word has length 206 [2023-03-30 22:47:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:47:24,966 INFO L495 AbstractCegarLoop]: Abstraction has 26120 states and 35644 transitions. [2023-03-30 22:47:24,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 4 states have internal predecessors, (176), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:47:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 26120 states and 35644 transitions. [2023-03-30 22:47:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-03-30 22:47:24,995 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:47:24,995 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:47:25,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:47:25,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:47:25,203 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:47:25,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:47:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash -435015369, now seen corresponding path program 1 times [2023-03-30 22:47:25,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:47:25,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62131769] [2023-03-30 22:47:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:25,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:47:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:26,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:26,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:47:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:47:26,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:26,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62131769] [2023-03-30 22:47:26,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62131769] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:47:26,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:47:26,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:47:26,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637033515] [2023-03-30 22:47:26,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:47:26,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:47:26,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:26,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:47:26,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:47:26,319 INFO L87 Difference]: Start difference. First operand 26120 states and 35644 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) [2023-03-30 22:47:28,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:47:28,681 INFO L93 Difference]: Finished difference Result 48564 states and 65967 transitions. [2023-03-30 22:47:28,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:47:28,682 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 [2023-03-30 22:47:28,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:47:28,798 INFO L225 Difference]: With dead ends: 48564 [2023-03-30 22:47:28,799 INFO L226 Difference]: Without dead ends: 32702 [2023-03-30 22:47:28,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:47:28,835 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 662 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:47:28,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 94 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 22:47:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32702 states. [2023-03-30 22:47:29,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32702 to 32514. [2023-03-30 22:47:29,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32514 states, 31578 states have (on average 1.2154347963772247) internal successors, (38381), 32198 states have internal predecessors, (38381), 164 states have call successors, (164), 152 states have call predecessors, (164), 771 states have return successors, (5515), 163 states have call predecessors, (5515), 163 states have call successors, (5515) [2023-03-30 22:47:29,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32514 states to 32514 states and 44060 transitions. [2023-03-30 22:47:29,932 INFO L78 Accepts]: Start accepts. Automaton has 32514 states and 44060 transitions. Word has length 205 [2023-03-30 22:47:29,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:47:29,933 INFO L495 AbstractCegarLoop]: Abstraction has 32514 states and 44060 transitions. [2023-03-30 22:47:29,933 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) [2023-03-30 22:47:29,933 INFO L276 IsEmpty]: Start isEmpty. Operand 32514 states and 44060 transitions. [2023-03-30 22:47:29,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-03-30 22:47:29,971 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:47:29,972 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 22:47:29,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-30 22:47:29,972 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:47:29,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:47:29,972 INFO L85 PathProgramCache]: Analyzing trace with hash 592650479, now seen corresponding path program 1 times [2023-03-30 22:47:29,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:47:29,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781745432] [2023-03-30 22:47:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:29,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:47:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:30,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:30,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:47:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:30,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:47:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:47:31,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:31,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781745432] [2023-03-30 22:47:31,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781745432] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:47:31,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479921180] [2023-03-30 22:47:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:31,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:47:31,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:47:31,003 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:47:31,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:47:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:31,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:47:31,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:47:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-30 22:47:31,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:47:31,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479921180] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:47:31,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:47:31,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-03-30 22:47:31,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490316135] [2023-03-30 22:47:31,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:47:31,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:47:31,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:31,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:47:31,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:47:31,463 INFO L87 Difference]: Start difference. First operand 32514 states and 44060 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:47:32,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:47:32,510 INFO L93 Difference]: Finished difference Result 62824 states and 85620 transitions. [2023-03-30 22:47:32,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:47:32,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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 216 [2023-03-30 22:47:32,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:47:32,720 INFO L225 Difference]: With dead ends: 62824 [2023-03-30 22:47:32,720 INFO L226 Difference]: Without dead ends: 30732 [2023-03-30 22:47:32,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:47:32,759 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 106 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:47:32,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 356 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 22:47:32,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30732 states. [2023-03-30 22:47:33,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30732 to 30692. [2023-03-30 22:47:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30692 states, 29835 states have (on average 1.1669180492709905) internal successors, (34815), 30394 states have internal predecessors, (34815), 154 states have call successors, (154), 144 states have call predecessors, (154), 702 states have return successors, (4256), 153 states have call predecessors, (4256), 153 states have call successors, (4256) [2023-03-30 22:47:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30692 states to 30692 states and 39225 transitions. [2023-03-30 22:47:33,546 INFO L78 Accepts]: Start accepts. Automaton has 30692 states and 39225 transitions. Word has length 216 [2023-03-30 22:47:33,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:47:33,548 INFO L495 AbstractCegarLoop]: Abstraction has 30692 states and 39225 transitions. [2023-03-30 22:47:33,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:47:33,548 INFO L276 IsEmpty]: Start isEmpty. Operand 30692 states and 39225 transitions. [2023-03-30 22:47:33,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2023-03-30 22:47:33,592 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:47:33,593 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 22:47:33,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:47:33,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:47:33,801 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:47:33,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:47:33,802 INFO L85 PathProgramCache]: Analyzing trace with hash -466676808, now seen corresponding path program 1 times [2023-03-30 22:47:33,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:47:33,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238601558] [2023-03-30 22:47:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:33,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:47:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:34,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:47:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:34,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:47:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:34,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-03-30 22:47:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:47:34,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:47:34,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238601558] [2023-03-30 22:47:34,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238601558] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:47:34,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009400669] [2023-03-30 22:47:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:47:34,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:47:34,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:47:34,474 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:47:34,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:47:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:47:34,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:47:34,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:47:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:47:34,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:47:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:47:34,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009400669] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:47:34,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:47:34,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 22:47:34,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156278938] [2023-03-30 22:47:34,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:47:34,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:47:34,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:47:34,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:47:34,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:47:34,834 INFO L87 Difference]: Start difference. First operand 30692 states and 39225 transitions. Second operand has 12 states, 12 states have (on average 20.75) internal successors, (249), 10 states have internal predecessors, (249), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)