/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/Problem15_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:59:49,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:59:49,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:59:49,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:59:49,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 22:59:49,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 22:59:49,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 22:59:49,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 22:59:49,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 22:59:49,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 22:59:49,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 22:59:49,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 22:59:49,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 22:59:49,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 22:59:49,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 22:59:49,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 22:59:49,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 22:59:49,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 22:59:49,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 22:59:49,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 22:59:49,706 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 22:59:49,738 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:59:49,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:59:49,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:59:49,739 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:59:49,740 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:59:49,740 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:59:49,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:59:49,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:59:49,741 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:59:49,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:59:49,742 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:59:49,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:59:49,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:59:49,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:59:49,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:59:49,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:59:49,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:59:49,743 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:59:49,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:59:49,743 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:59:49,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:59:49,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:59:49,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:59:49,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:59:49,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:59:49,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:59:49,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:59:49,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:59:49,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:59:49,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:59:49,745 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:59:49,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:59:49,745 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:59:49,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:59:49,745 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:59:49,745 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:59:49,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:59:49,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:59:49,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:59:49,992 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:59:49,995 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:59:49,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label16.c [2023-04-01 22:59:51,206 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:59:51,552 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:59:51,553 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label16.c [2023-04-01 22:59:51,573 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a56438c7/a35aae91b16c45ffa70a46dbf339b285/FLAGdbb797e07 [2023-04-01 22:59:51,590 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a56438c7/a35aae91b16c45ffa70a46dbf339b285 [2023-04-01 22:59:51,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:59:51,594 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:59:51,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:59:51,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:59:51,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:59:51,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:59:51" (1/1) ... [2023-04-01 22:59:51,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@370a755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:51, skipping insertion in model container [2023-04-01 22:59:51,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:59:51" (1/1) ... [2023-04-01 22:59:51,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:59:51,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:59:51,924 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/Problem15_label16.c[7550,7563] [2023-04-01 22:59:52,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:59:52,342 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:59:52,365 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/Problem15_label16.c[7550,7563] [2023-04-01 22:59:52,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:59:52,541 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:59:52,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:52 WrapperNode [2023-04-01 22:59:52,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:59:52,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:59:52,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:59:52,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:59:52,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:52" (1/1) ... [2023-04-01 22:59:52,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:52" (1/1) ... [2023-04-01 22:59:52,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:52" (1/1) ... [2023-04-01 22:59:52,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:52" (1/1) ... [2023-04-01 22:59:52,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:52" (1/1) ... [2023-04-01 22:59:52,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:52" (1/1) ... [2023-04-01 22:59:52,694 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:52" (1/1) ... [2023-04-01 22:59:52,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:52" (1/1) ... [2023-04-01 22:59:52,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:59:52,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:59:52,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:59:52,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:59:52,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:52" (1/1) ... [2023-04-01 22:59:52,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:59:52,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:52,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 22:59:52,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 22:59:52,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:59:52,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:59:52,798 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:59:52,798 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:59:52,798 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:59:52,799 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:59:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:59:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:59:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:59:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:59:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:59:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:59:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:59:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:59:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:59:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:59:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:59:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:59:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:59:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:59:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:59:52,879 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:59:52,881 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:59:55,500 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:59:55,516 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:59:55,517 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:59:55,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:59:55 BoogieIcfgContainer [2023-04-01 22:59:55,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:59:55,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:59:55,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:59:55,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:59:55,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:59:51" (1/3) ... [2023-04-01 22:59:55,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba975e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:59:55, skipping insertion in model container [2023-04-01 22:59:55,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:52" (2/3) ... [2023-04-01 22:59:55,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba975e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:59:55, skipping insertion in model container [2023-04-01 22:59:55,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:59:55" (3/3) ... [2023-04-01 22:59:55,528 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label16.c [2023-04-01 22:59:55,545 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:59:55,545 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:59:55,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:59:55,628 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;@223c6ce8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:59:55,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:59:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 22:59:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 22:59:55,647 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:55,648 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] [2023-04-01 22:59:55,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:55,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:55,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1841098697, now seen corresponding path program 1 times [2023-04-01 22:59:55,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:55,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7703967] [2023-04-01 22:59:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:55,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:56,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:59:56,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:56,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7703967] [2023-04-01 22:59:56,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7703967] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:59:56,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:59:56,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 22:59:56,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186489627] [2023-04-01 22:59:56,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:59:56,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 22:59:56,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:56,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 22:59:56,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 22:59:56,285 INFO L87 Difference]: Start difference. First operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:59:59,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:59,376 INFO L93 Difference]: Finished difference Result 1203 states and 2166 transitions. [2023-04-01 22:59:59,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 22:59:59,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 68 [2023-04-01 22:59:59,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:59,393 INFO L225 Difference]: With dead ends: 1203 [2023-04-01 22:59:59,393 INFO L226 Difference]: Without dead ends: 702 [2023-04-01 22:59:59,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:59:59,404 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 1009 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:59,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1009 Valid, 85 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 22:59:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2023-04-01 22:59:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 696. [2023-04-01 22:59:59,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 680 states have (on average 1.4676470588235293) internal successors, (998), 682 states have internal predecessors, (998), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 22:59:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1015 transitions. [2023-04-01 22:59:59,483 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1015 transitions. Word has length 68 [2023-04-01 22:59:59,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:59,485 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 1015 transitions. [2023-04-01 22:59:59,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:59:59,486 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1015 transitions. [2023-04-01 22:59:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 22:59:59,500 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:59,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:59:59,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:59:59,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:59,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:59,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2089835265, now seen corresponding path program 1 times [2023-04-01 22:59:59,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:59,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321156286] [2023-04-01 22:59:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:59,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:59,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:59,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:00:00,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:00,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321156286] [2023-04-01 23:00:00,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321156286] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:00:00,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:00:00,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:00:00,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772380385] [2023-04-01 23:00:00,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:00:00,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:00:00,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:00,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:00:00,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:00:00,035 INFO L87 Difference]: Start difference. First operand 696 states and 1015 transitions. Second operand has 7 states, 6 states have (on average 23.5) internal successors, (141), 4 states have internal predecessors, (141), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:00:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:04,283 INFO L93 Difference]: Finished difference Result 2072 states and 3048 transitions. [2023-04-01 23:00:04,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:00:04,284 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 23.5) internal successors, (141), 4 states have internal predecessors, (141), 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 147 [2023-04-01 23:00:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:04,292 INFO L225 Difference]: With dead ends: 2072 [2023-04-01 23:00:04,292 INFO L226 Difference]: Without dead ends: 1382 [2023-04-01 23:00:04,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:00:04,300 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1016 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3207 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 3462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 3207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:04,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 241 Invalid, 3462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 3207 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 23:00:04,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2023-04-01 23:00:04,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1359. [2023-04-01 23:00:04,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1323 states have (on average 1.3862433862433863) internal successors, (1834), 1334 states have internal predecessors, (1834), 10 states have call successors, (10), 10 states have call predecessors, (10), 25 states have return successors, (45), 14 states have call predecessors, (45), 9 states have call successors, (45) [2023-04-01 23:00:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1889 transitions. [2023-04-01 23:00:04,383 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1889 transitions. Word has length 147 [2023-04-01 23:00:04,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:04,384 INFO L495 AbstractCegarLoop]: Abstraction has 1359 states and 1889 transitions. [2023-04-01 23:00:04,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 23.5) internal successors, (141), 4 states have internal predecessors, (141), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:00:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1889 transitions. [2023-04-01 23:00:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-01 23:00:04,388 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:04,388 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:00:04,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:00:04,389 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:04,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:04,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1826437495, now seen corresponding path program 1 times [2023-04-01 23:00:04,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:04,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698167106] [2023-04-01 23:00:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:04,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:04,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:04,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:00:04,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:04,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698167106] [2023-04-01 23:00:04,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698167106] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:00:04,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:00:04,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:00:04,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58580495] [2023-04-01 23:00:04,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:00:04,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:00:04,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:04,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:00:04,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:00:04,808 INFO L87 Difference]: Start difference. First operand 1359 states and 1889 transitions. Second operand has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 4 states have internal predecessors, (145), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:00:08,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:08,434 INFO L93 Difference]: Finished difference Result 4068 states and 5764 transitions. [2023-04-01 23:00:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:00:08,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 4 states have internal predecessors, (145), 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 151 [2023-04-01 23:00:08,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:08,450 INFO L225 Difference]: With dead ends: 4068 [2023-04-01 23:00:08,450 INFO L226 Difference]: Without dead ends: 2715 [2023-04-01 23:00:08,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:00:08,461 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1274 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1274 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:08,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1274 Valid, 169 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 23:00:08,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2023-04-01 23:00:08,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 2338. [2023-04-01 23:00:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2265 states have (on average 1.2710816777041942) internal successors, (2879), 2298 states have internal predecessors, (2879), 16 states have call successors, (16), 16 states have call predecessors, (16), 56 states have return successors, (109), 23 states have call predecessors, (109), 15 states have call successors, (109) [2023-04-01 23:00:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 3004 transitions. [2023-04-01 23:00:08,544 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 3004 transitions. Word has length 151 [2023-04-01 23:00:08,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:08,546 INFO L495 AbstractCegarLoop]: Abstraction has 2338 states and 3004 transitions. [2023-04-01 23:00:08,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 4 states have internal predecessors, (145), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:00:08,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 3004 transitions. [2023-04-01 23:00:08,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-04-01 23:00:08,550 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:08,550 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:00:08,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:00:08,550 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:08,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:08,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1272266370, now seen corresponding path program 1 times [2023-04-01 23:00:08,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:08,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966499256] [2023-04-01 23:00:08,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:08,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:08,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:08,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:00:08,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:08,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966499256] [2023-04-01 23:00:08,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966499256] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:08,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481847947] [2023-04-01 23:00:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:08,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:08,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:08,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:08,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 23:00:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:09,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:00:09,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:00:09,350 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:00:09,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481847947] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:00:09,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:00:09,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:00:09,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063074984] [2023-04-01 23:00:09,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:00:09,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:00:09,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:09,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:00:09,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:00:09,352 INFO L87 Difference]: Start difference. First operand 2338 states and 3004 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 23:00:10,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:10,957 INFO L93 Difference]: Finished difference Result 5922 states and 7869 transitions. [2023-04-01 23:00:10,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:00:10,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 268 [2023-04-01 23:00:10,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:10,974 INFO L225 Difference]: With dead ends: 5922 [2023-04-01 23:00:10,974 INFO L226 Difference]: Without dead ends: 3590 [2023-04-01 23:00:10,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:00:10,979 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 315 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:10,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 222 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 23:00:10,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2023-04-01 23:00:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 3587. [2023-04-01 23:00:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3489 states have (on average 1.2593866437374606) internal successors, (4394), 3530 states have internal predecessors, (4394), 24 states have call successors, (24), 24 states have call predecessors, (24), 73 states have return successors, (220), 32 states have call predecessors, (220), 23 states have call successors, (220) [2023-04-01 23:00:11,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 4638 transitions. [2023-04-01 23:00:11,064 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 4638 transitions. Word has length 268 [2023-04-01 23:00:11,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:11,065 INFO L495 AbstractCegarLoop]: Abstraction has 3587 states and 4638 transitions. [2023-04-01 23:00:11,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 23:00:11,066 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 4638 transitions. [2023-04-01 23:00:11,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-04-01 23:00:11,072 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:11,073 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:00:11,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:11,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:11,281 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:11,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:11,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1444428410, now seen corresponding path program 1 times [2023-04-01 23:00:11,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:11,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702626505] [2023-04-01 23:00:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:11,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:11,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:11,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:12,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:00:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-04-01 23:00:12,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:12,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702626505] [2023-04-01 23:00:12,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702626505] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:12,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928357861] [2023-04-01 23:00:12,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:12,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:12,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:12,368 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:12,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 23:00:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:12,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 23:00:12,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-04-01 23:00:13,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:00:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-04-01 23:00:14,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928357861] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:14,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:00:14,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-04-01 23:00:14,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318987748] [2023-04-01 23:00:14,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:00:14,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 23:00:14,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:14,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 23:00:14,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:00:14,368 INFO L87 Difference]: Start difference. First operand 3587 states and 4638 transitions. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:00:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:16,276 INFO L93 Difference]: Finished difference Result 10622 states and 14017 transitions. [2023-04-01 23:00:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 23:00:16,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 436 [2023-04-01 23:00:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:16,310 INFO L225 Difference]: With dead ends: 10622 [2023-04-01 23:00:16,310 INFO L226 Difference]: Without dead ends: 7041 [2023-04-01 23:00:16,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:00:16,321 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 481 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:16,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 130 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 23:00:16,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7041 states. [2023-04-01 23:00:16,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7041 to 6420. [2023-04-01 23:00:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6420 states, 6254 states have (on average 1.249920051167253) internal successors, (7817), 6323 states have internal predecessors, (7817), 42 states have call successors, (42), 42 states have call predecessors, (42), 123 states have return successors, (595), 54 states have call predecessors, (595), 41 states have call successors, (595) [2023-04-01 23:00:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6420 states to 6420 states and 8454 transitions. [2023-04-01 23:00:16,572 INFO L78 Accepts]: Start accepts. Automaton has 6420 states and 8454 transitions. Word has length 436 [2023-04-01 23:00:16,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:16,572 INFO L495 AbstractCegarLoop]: Abstraction has 6420 states and 8454 transitions. [2023-04-01 23:00:16,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:00:16,573 INFO L276 IsEmpty]: Start isEmpty. Operand 6420 states and 8454 transitions. [2023-04-01 23:00:16,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-04-01 23:00:16,581 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:16,581 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2023-04-01 23:00:16,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:16,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:16,790 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:16,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:16,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1987690396, now seen corresponding path program 1 times [2023-04-01 23:00:16,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:16,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855417720] [2023-04-01 23:00:16,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:16,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:17,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:17,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:17,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:00:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:17,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2023-04-01 23:00:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 346 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 23:00:17,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:17,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855417720] [2023-04-01 23:00:17,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855417720] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:17,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263025048] [2023-04-01 23:00:17,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:17,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:17,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:17,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:17,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 23:00:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:17,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:00:17,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 348 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 23:00:17,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:00:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 348 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 23:00:18,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263025048] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:00:18,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:00:18,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:00:18,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551592013] [2023-04-01 23:00:18,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:00:18,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:00:18,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:18,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:00:18,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:00:18,003 INFO L87 Difference]: Start difference. First operand 6420 states and 8454 transitions. Second operand has 11 states, 11 states have (on average 45.90909090909091) internal successors, (505), 9 states have internal predecessors, (505), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:00:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:22,592 INFO L93 Difference]: Finished difference Result 15517 states and 20946 transitions. [2023-04-01 23:00:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 23:00:22,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 45.90909090909091) internal successors, (505), 9 states have internal predecessors, (505), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 461 [2023-04-01 23:00:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:22,637 INFO L225 Difference]: With dead ends: 15517 [2023-04-01 23:00:22,637 INFO L226 Difference]: Without dead ends: 9103 [2023-04-01 23:00:22,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 938 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:00:22,654 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1895 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 5693 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1899 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 6284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 5693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:22,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1899 Valid, 328 Invalid, 6284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 5693 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 23:00:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9103 states. [2023-04-01 23:00:22,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9103 to 8112. [2023-04-01 23:00:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8112 states, 7854 states have (on average 1.1788897377132672) internal successors, (9259), 7988 states have internal predecessors, (9259), 52 states have call successors, (52), 52 states have call predecessors, (52), 205 states have return successors, (813), 71 states have call predecessors, (813), 51 states have call successors, (813) [2023-04-01 23:00:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8112 states to 8112 states and 10124 transitions. [2023-04-01 23:00:22,917 INFO L78 Accepts]: Start accepts. Automaton has 8112 states and 10124 transitions. Word has length 461 [2023-04-01 23:00:22,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:22,917 INFO L495 AbstractCegarLoop]: Abstraction has 8112 states and 10124 transitions. [2023-04-01 23:00:22,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.90909090909091) internal successors, (505), 9 states have internal predecessors, (505), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:00:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 8112 states and 10124 transitions. [2023-04-01 23:00:22,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2023-04-01 23:00:22,927 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:22,928 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:00:22,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:23,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:23,135 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:23,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:23,136 INFO L85 PathProgramCache]: Analyzing trace with hash 449401997, now seen corresponding path program 1 times [2023-04-01 23:00:23,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:23,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104935426] [2023-04-01 23:00:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:23,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:23,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:23,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:23,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:00:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:23,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2023-04-01 23:00:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 308 proven. 82 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-01 23:00:23,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:23,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104935426] [2023-04-01 23:00:23,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104935426] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:23,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668295841] [2023-04-01 23:00:23,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:23,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:23,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:24,078 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:24,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 23:00:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:24,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:00:24,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 350 proven. 2 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-04-01 23:00:24,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:00:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 350 proven. 2 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-04-01 23:00:24,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668295841] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:00:24,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:00:24,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:00:24,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759795936] [2023-04-01 23:00:24,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:00:24,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:00:24,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:24,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:00:24,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:00:24,625 INFO L87 Difference]: Start difference. First operand 8112 states and 10124 transitions. Second operand has 11 states, 11 states have (on average 50.36363636363637) internal successors, (554), 9 states have internal predecessors, (554), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:00:29,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:29,146 INFO L93 Difference]: Finished difference Result 24429 states and 31460 transitions. [2023-04-01 23:00:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 23:00:29,147 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 50.36363636363637) internal successors, (554), 9 states have internal predecessors, (554), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 477 [2023-04-01 23:00:29,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:29,206 INFO L225 Difference]: With dead ends: 24429 [2023-04-01 23:00:29,206 INFO L226 Difference]: Without dead ends: 16323 [2023-04-01 23:00:29,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 967 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2023-04-01 23:00:29,227 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 4981 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 3962 mSolverCounterSat, 872 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4985 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 4834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 872 IncrementalHoareTripleChecker+Valid, 3962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:29,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4985 Valid, 387 Invalid, 4834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [872 Valid, 3962 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 23:00:29,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16323 states. [2023-04-01 23:00:29,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16323 to 16274. [2023-04-01 23:00:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16274 states, 15715 states have (on average 1.1650015908367801) internal successors, (18308), 16039 states have internal predecessors, (18308), 102 states have call successors, (102), 102 states have call predecessors, (102), 456 states have return successors, (1929), 132 states have call predecessors, (1929), 101 states have call successors, (1929) [2023-04-01 23:00:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16274 states to 16274 states and 20339 transitions. [2023-04-01 23:00:29,668 INFO L78 Accepts]: Start accepts. Automaton has 16274 states and 20339 transitions. Word has length 477 [2023-04-01 23:00:29,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:29,669 INFO L495 AbstractCegarLoop]: Abstraction has 16274 states and 20339 transitions. [2023-04-01 23:00:29,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 50.36363636363637) internal successors, (554), 9 states have internal predecessors, (554), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:00:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 16274 states and 20339 transitions. [2023-04-01 23:00:29,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2023-04-01 23:00:29,683 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:29,683 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:00:29,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:29,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:29,890 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:29,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:29,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1851272644, now seen corresponding path program 1 times [2023-04-01 23:00:29,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:29,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762489641] [2023-04-01 23:00:29,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:29,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:30,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:30,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:30,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:00:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:30,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2023-04-01 23:00:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-04-01 23:00:30,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:30,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762489641] [2023-04-01 23:00:30,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762489641] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:00:30,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:00:30,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 23:00:30,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369973402] [2023-04-01 23:00:30,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:00:30,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:00:30,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:30,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:00:30,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:00:30,289 INFO L87 Difference]: Start difference. First operand 16274 states and 20339 transitions. Second operand has 5 states, 5 states have (on average 53.6) internal successors, (268), 3 states have internal predecessors, (268), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:00:32,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:32,636 INFO L93 Difference]: Finished difference Result 32847 states and 41046 transitions. [2023-04-01 23:00:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:00:32,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.6) internal successors, (268), 3 states have internal predecessors, (268), 2 states have call successors, (4), 4 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 507 [2023-04-01 23:00:32,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:32,691 INFO L225 Difference]: With dead ends: 32847 [2023-04-01 23:00:32,692 INFO L226 Difference]: Without dead ends: 16579 [2023-04-01 23:00:32,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:00:32,723 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1762 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1762 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:32,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1762 Valid, 81 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 23:00:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16579 states. [2023-04-01 23:00:33,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16579 to 16264. [2023-04-01 23:00:33,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16264 states, 15707 states have (on average 1.164703635321831) internal successors, (18294), 16029 states have internal predecessors, (18294), 102 states have call successors, (102), 102 states have call predecessors, (102), 454 states have return successors, (1926), 132 states have call predecessors, (1926), 101 states have call successors, (1926) [2023-04-01 23:00:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16264 states to 16264 states and 20322 transitions. [2023-04-01 23:00:33,239 INFO L78 Accepts]: Start accepts. Automaton has 16264 states and 20322 transitions. Word has length 507 [2023-04-01 23:00:33,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:33,240 INFO L495 AbstractCegarLoop]: Abstraction has 16264 states and 20322 transitions. [2023-04-01 23:00:33,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.6) internal successors, (268), 3 states have internal predecessors, (268), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:00:33,240 INFO L276 IsEmpty]: Start isEmpty. Operand 16264 states and 20322 transitions. [2023-04-01 23:00:33,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-04-01 23:00:33,258 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:33,258 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:00:33,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 23:00:33,259 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:33,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:33,259 INFO L85 PathProgramCache]: Analyzing trace with hash -576154983, now seen corresponding path program 1 times [2023-04-01 23:00:33,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:33,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805982813] [2023-04-01 23:00:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:33,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:33,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:33,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:33,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:00:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:33,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2023-04-01 23:00:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:33,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2023-04-01 23:00:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 480 proven. 2 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-04-01 23:00:33,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:33,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805982813] [2023-04-01 23:00:33,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805982813] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:33,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100230946] [2023-04-01 23:00:33,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:33,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:33,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:33,849 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:33,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 23:00:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:34,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:00:34,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 483 proven. 2 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-04-01 23:00:34,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:00:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 483 proven. 2 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-04-01 23:00:34,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100230946] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:00:34,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:00:34,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2023-04-01 23:00:34,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033688554] [2023-04-01 23:00:34,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:00:34,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 23:00:34,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:34,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 23:00:34,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:00:34,520 INFO L87 Difference]: Start difference. First operand 16264 states and 20322 transitions. Second operand has 9 states, 9 states have (on average 55.888888888888886) internal successors, (503), 7 states have internal predecessors, (503), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:00:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:37,147 INFO L93 Difference]: Finished difference Result 36294 states and 45762 transitions. [2023-04-01 23:00:37,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:00:37,149 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 55.888888888888886) internal successors, (503), 7 states have internal predecessors, (503), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 531 [2023-04-01 23:00:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:37,220 INFO L225 Difference]: With dead ends: 36294 [2023-04-01 23:00:37,221 INFO L226 Difference]: Without dead ends: 20036 [2023-04-01 23:00:37,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1088 GetRequests, 1073 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:00:37,247 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1754 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1754 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:37,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1754 Valid, 164 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 23:00:37,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20036 states. [2023-04-01 23:00:37,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20036 to 19057. [2023-04-01 23:00:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19057 states, 18449 states have (on average 1.1483549243861455) internal successors, (21186), 18786 states have internal predecessors, (21186), 120 states have call successors, (120), 120 states have call predecessors, (120), 487 states have return successors, (2085), 150 states have call predecessors, (2085), 119 states have call successors, (2085) [2023-04-01 23:00:37,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19057 states to 19057 states and 23391 transitions. [2023-04-01 23:00:37,670 INFO L78 Accepts]: Start accepts. Automaton has 19057 states and 23391 transitions. Word has length 531 [2023-04-01 23:00:37,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:37,671 INFO L495 AbstractCegarLoop]: Abstraction has 19057 states and 23391 transitions. [2023-04-01 23:00:37,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.888888888888886) internal successors, (503), 7 states have internal predecessors, (503), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:00:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 19057 states and 23391 transitions. [2023-04-01 23:00:37,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-04-01 23:00:37,683 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:37,684 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:00:37,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:37,890 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 [2023-04-01 23:00:37,891 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:37,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:37,891 INFO L85 PathProgramCache]: Analyzing trace with hash 172384332, now seen corresponding path program 1 times [2023-04-01 23:00:37,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:37,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798024351] [2023-04-01 23:00:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:37,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:38,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:38,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:38,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:00:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:38,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2023-04-01 23:00:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 186 proven. 3 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-04-01 23:00:38,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:38,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798024351] [2023-04-01 23:00:38,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798024351] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:38,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113821908] [2023-04-01 23:00:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:38,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:38,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:38,509 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:38,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 23:00:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:38,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:00:38,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-04-01 23:00:38,790 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:00:38,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113821908] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:00:38,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:00:38,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:00:38,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317854921] [2023-04-01 23:00:38,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:00:38,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:00:38,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:38,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:00:38,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:00:38,795 INFO L87 Difference]: Start difference. First operand 19057 states and 23391 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:00:40,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:40,368 INFO L93 Difference]: Finished difference Result 42125 states and 52314 transitions. [2023-04-01 23:00:40,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:00:40,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 553 [2023-04-01 23:00:40,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:40,430 INFO L225 Difference]: With dead ends: 42125 [2023-04-01 23:00:40,430 INFO L226 Difference]: Without dead ends: 23074 [2023-04-01 23:00:40,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 560 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:00:40,459 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 333 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:40,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 185 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 23:00:40,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23074 states. [2023-04-01 23:00:40,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23074 to 21846. [2023-04-01 23:00:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21846 states, 21189 states have (on average 1.1486620416253717) internal successors, (24339), 21539 states have internal predecessors, (24339), 138 states have call successors, (138), 138 states have call predecessors, (138), 518 states have return successors, (2482), 168 states have call predecessors, (2482), 137 states have call successors, (2482) [2023-04-01 23:00:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21846 states to 21846 states and 26959 transitions. [2023-04-01 23:00:40,837 INFO L78 Accepts]: Start accepts. Automaton has 21846 states and 26959 transitions. Word has length 553 [2023-04-01 23:00:40,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:40,838 INFO L495 AbstractCegarLoop]: Abstraction has 21846 states and 26959 transitions. [2023-04-01 23:00:40,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:00:40,838 INFO L276 IsEmpty]: Start isEmpty. Operand 21846 states and 26959 transitions. [2023-04-01 23:00:40,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-04-01 23:00:40,905 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:40,905 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:00:40,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:41,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:41,112 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:41,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:41,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1871110801, now seen corresponding path program 1 times [2023-04-01 23:00:41,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:41,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654295224] [2023-04-01 23:00:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:41,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:42,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:42,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:42,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:00:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:42,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2023-04-01 23:00:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 284 proven. 66 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-04-01 23:00:42,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:42,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654295224] [2023-04-01 23:00:42,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654295224] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:42,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699138962] [2023-04-01 23:00:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:42,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:42,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:42,717 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:42,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 23:00:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:42,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:00:42,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-04-01 23:00:43,645 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:00:43,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699138962] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:00:43,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:00:43,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 23:00:43,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426278474] [2023-04-01 23:00:43,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:00:43,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:00:43,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:43,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:00:43,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:00:43,647 INFO L87 Difference]: Start difference. First operand 21846 states and 26959 transitions. Second operand has 5 states, 5 states have (on average 80.6) internal successors, (403), 4 states have internal predecessors, (403), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:00:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:45,893 INFO L93 Difference]: Finished difference Result 44688 states and 55157 transitions. [2023-04-01 23:00:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 23:00:45,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 80.6) internal successors, (403), 4 states have internal predecessors, (403), 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 553 [2023-04-01 23:00:45,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:45,954 INFO L225 Difference]: With dead ends: 44688 [2023-04-01 23:00:45,954 INFO L226 Difference]: Without dead ends: 22848 [2023-04-01 23:00:45,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:00:45,988 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 637 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:45,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 164 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 23:00:46,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22848 states. [2023-04-01 23:00:46,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22848 to 22521. [2023-04-01 23:00:46,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22521 states, 21826 states have (on average 1.144598185650142) internal successors, (24982), 22205 states have internal predecessors, (24982), 142 states have call successors, (142), 142 states have call predecessors, (142), 552 states have return successors, (2639), 173 states have call predecessors, (2639), 141 states have call successors, (2639) [2023-04-01 23:00:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22521 states to 22521 states and 27763 transitions. [2023-04-01 23:00:46,526 INFO L78 Accepts]: Start accepts. Automaton has 22521 states and 27763 transitions. Word has length 553 [2023-04-01 23:00:46,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:46,527 INFO L495 AbstractCegarLoop]: Abstraction has 22521 states and 27763 transitions. [2023-04-01 23:00:46,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.6) internal successors, (403), 4 states have internal predecessors, (403), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:00:46,527 INFO L276 IsEmpty]: Start isEmpty. Operand 22521 states and 27763 transitions. [2023-04-01 23:00:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2023-04-01 23:00:46,543 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:46,543 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:00:46,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:46,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:46,750 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:46,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:46,750 INFO L85 PathProgramCache]: Analyzing trace with hash 408522426, now seen corresponding path program 1 times [2023-04-01 23:00:46,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:46,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813076674] [2023-04-01 23:00:46,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:46,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:47,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:47,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:47,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:00:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:47,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 484 [2023-04-01 23:00:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 386 proven. 82 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-01 23:00:47,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:47,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813076674] [2023-04-01 23:00:47,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813076674] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:47,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940727020] [2023-04-01 23:00:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:47,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:47,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:47,573 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:47,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 23:00:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:47,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:00:47,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 487 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-04-01 23:00:48,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:00:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 387 proven. 83 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-01 23:00:48,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940727020] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:00:48,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:00:48,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:00:48,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142365766] [2023-04-01 23:00:48,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:00:48,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:00:48,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:48,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:00:48,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:00:48,573 INFO L87 Difference]: Start difference. First operand 22521 states and 27763 transitions. Second operand has 11 states, 11 states have (on average 87.18181818181819) internal successors, (959), 9 states have internal predecessors, (959), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:00:52,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:52,147 INFO L93 Difference]: Finished difference Result 44851 states and 55345 transitions. [2023-04-01 23:00:52,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 23:00:52,147 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 87.18181818181819) internal successors, (959), 9 states have internal predecessors, (959), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 627 [2023-04-01 23:00:52,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:52,210 INFO L225 Difference]: With dead ends: 44851 [2023-04-01 23:00:52,210 INFO L226 Difference]: Without dead ends: 22336 [2023-04-01 23:00:52,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1295 GetRequests, 1269 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:00:52,247 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 1818 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3269 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1818 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 3977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 3269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:52,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1818 Valid, 245 Invalid, 3977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 3269 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 23:00:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22336 states. [2023-04-01 23:00:52,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22336 to 22315. [2023-04-01 23:00:52,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22315 states, 21578 states have (on average 1.123551765687274) internal successors, (24244), 22003 states have internal predecessors, (24244), 140 states have call successors, (140), 140 states have call predecessors, (140), 596 states have return successors, (2343), 171 states have call predecessors, (2343), 139 states have call successors, (2343) [2023-04-01 23:00:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22315 states to 22315 states and 26727 transitions. [2023-04-01 23:00:52,702 INFO L78 Accepts]: Start accepts. Automaton has 22315 states and 26727 transitions. Word has length 627 [2023-04-01 23:00:52,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:52,703 INFO L495 AbstractCegarLoop]: Abstraction has 22315 states and 26727 transitions. [2023-04-01 23:00:52,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 87.18181818181819) internal successors, (959), 9 states have internal predecessors, (959), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:00:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 22315 states and 26727 transitions. [2023-04-01 23:00:52,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 706 [2023-04-01 23:00:52,790 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:52,791 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:00:52,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:52,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 23:00:52,998 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:52,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:52,998 INFO L85 PathProgramCache]: Analyzing trace with hash 2013329094, now seen corresponding path program 1 times [2023-04-01 23:00:52,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:52,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001009483] [2023-04-01 23:00:52,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:52,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:53,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:53,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:53,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:00:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:53,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 23:00:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 186 proven. 3 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2023-04-01 23:00:53,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:53,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001009483] [2023-04-01 23:00:53,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001009483] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:53,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148700048] [2023-04-01 23:00:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:53,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:53,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:53,856 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:53,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 23:00:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:54,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:00:54,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2023-04-01 23:00:54,187 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:00:54,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148700048] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:00:54,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:00:54,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2023-04-01 23:00:54,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913488048] [2023-04-01 23:00:54,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:00:54,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 23:00:54,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:54,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 23:00:54,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:00:54,189 INFO L87 Difference]: Start difference. First operand 22315 states and 26727 transitions. Second operand has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:00:56,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:56,413 INFO L93 Difference]: Finished difference Result 58833 states and 70518 transitions. [2023-04-01 23:00:56,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 23:00:56,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 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 705 [2023-04-01 23:00:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:56,493 INFO L225 Difference]: With dead ends: 58833 [2023-04-01 23:00:56,494 INFO L226 Difference]: Without dead ends: 36524 [2023-04-01 23:00:56,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 713 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:00:56,527 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 914 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:56,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 239 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 23:00:56,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36524 states. [2023-04-01 23:00:56,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36524 to 26988. [2023-04-01 23:00:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26988 states, 26162 states have (on average 1.1274749636877914) internal successors, (29497), 26613 states have internal predecessors, (29497), 170 states have call successors, (170), 170 states have call predecessors, (170), 655 states have return successors, (2970), 204 states have call predecessors, (2970), 169 states have call successors, (2970) [2023-04-01 23:00:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26988 states to 26988 states and 32637 transitions. [2023-04-01 23:00:57,063 INFO L78 Accepts]: Start accepts. Automaton has 26988 states and 32637 transitions. Word has length 705 [2023-04-01 23:00:57,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:57,064 INFO L495 AbstractCegarLoop]: Abstraction has 26988 states and 32637 transitions. [2023-04-01 23:00:57,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:00:57,064 INFO L276 IsEmpty]: Start isEmpty. Operand 26988 states and 32637 transitions. [2023-04-01 23:00:57,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 711 [2023-04-01 23:00:57,081 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:57,082 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:00:57,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:57,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 23:00:57,288 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:57,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1936624532, now seen corresponding path program 1 times [2023-04-01 23:00:57,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:57,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753810033] [2023-04-01 23:00:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:57,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:57,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:57,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:57,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:00:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:57,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 23:00:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2023-04-01 23:00:58,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:58,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753810033] [2023-04-01 23:00:58,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753810033] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:00:58,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:00:58,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 23:00:58,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089601203] [2023-04-01 23:00:58,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:00:58,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:00:58,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:58,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:00:58,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:00:58,206 INFO L87 Difference]: Start difference. First operand 26988 states and 32637 transitions. Second operand has 5 states, 5 states have (on average 68.4) internal successors, (342), 3 states have internal predecessors, (342), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:01:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:01:00,830 INFO L93 Difference]: Finished difference Result 57633 states and 69488 transitions. [2023-04-01 23:01:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:01:00,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 68.4) internal successors, (342), 3 states have internal predecessors, (342), 2 states have call successors, (4), 4 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 710 [2023-04-01 23:01:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:01:00,888 INFO L225 Difference]: With dead ends: 57633 [2023-04-01 23:01:00,888 INFO L226 Difference]: Without dead ends: 26862 [2023-04-01 23:01:00,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:01:00,925 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 992 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:01:00,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 127 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1814 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 23:01:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26862 states. [2023-04-01 23:01:01,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26862 to 26848. [2023-04-01 23:01:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26848 states, 26081 states have (on average 1.1062842682412484) internal successors, (28853), 26484 states have internal predecessors, (28853), 170 states have call successors, (170), 170 states have call predecessors, (170), 596 states have return successors, (2433), 193 states have call predecessors, (2433), 169 states have call successors, (2433) [2023-04-01 23:01:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26848 states to 26848 states and 31456 transitions. [2023-04-01 23:01:01,444 INFO L78 Accepts]: Start accepts. Automaton has 26848 states and 31456 transitions. Word has length 710 [2023-04-01 23:01:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:01:01,444 INFO L495 AbstractCegarLoop]: Abstraction has 26848 states and 31456 transitions. [2023-04-01 23:01:01,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.4) internal successors, (342), 3 states have internal predecessors, (342), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:01:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 26848 states and 31456 transitions. [2023-04-01 23:01:01,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2023-04-01 23:01:01,467 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:01:01,468 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2023-04-01 23:01:01,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 23:01:01,468 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:01:01,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:01:01,469 INFO L85 PathProgramCache]: Analyzing trace with hash -331020342, now seen corresponding path program 1 times [2023-04-01 23:01:01,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:01:01,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43049310] [2023-04-01 23:01:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:01:01,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:01:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:02,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:01:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:02,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:01:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:02,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:01:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:02,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 475 [2023-04-01 23:01:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:02,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 677 [2023-04-01 23:01:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 646 proven. 82 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2023-04-01 23:01:02,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:01:02,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43049310] [2023-04-01 23:01:02,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43049310] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:01:02,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430616282] [2023-04-01 23:01:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:01:02,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:01:02,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:01:02,508 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:01:02,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 23:01:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:02,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:01:02,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:01:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 827 proven. 2 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-04-01 23:01:03,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:01:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 648 proven. 83 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2023-04-01 23:01:03,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430616282] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:01:03,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:01:03,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:01:03,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867398009] [2023-04-01 23:01:03,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:01:03,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:01:03,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:01:03,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:01:03,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:01:03,602 INFO L87 Difference]: Start difference. First operand 26848 states and 31456 transitions. Second operand has 11 states, 11 states have (on average 87.36363636363636) internal successors, (961), 9 states have internal predecessors, (961), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:01:08,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:01:08,058 INFO L93 Difference]: Finished difference Result 54073 states and 63433 transitions. [2023-04-01 23:01:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 23:01:08,059 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 87.36363636363636) internal successors, (961), 9 states have internal predecessors, (961), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 820 [2023-04-01 23:01:08,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:01:08,124 INFO L225 Difference]: With dead ends: 54073 [2023-04-01 23:01:08,124 INFO L226 Difference]: Without dead ends: 27231 [2023-04-01 23:01:08,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1683 GetRequests, 1657 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:01:08,155 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1570 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 5566 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 5974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 5566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:01:08,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 308 Invalid, 5974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 5566 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 23:01:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27231 states. [2023-04-01 23:01:08,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27231 to 26248. [2023-04-01 23:01:08,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26248 states, 25481 states have (on average 1.0775087319963894) internal successors, (27456), 25892 states have internal predecessors, (27456), 166 states have call successors, (166), 166 states have call predecessors, (166), 600 states have return successors, (1734), 189 states have call predecessors, (1734), 165 states have call successors, (1734) [2023-04-01 23:01:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26248 states to 26248 states and 29356 transitions. [2023-04-01 23:01:08,681 INFO L78 Accepts]: Start accepts. Automaton has 26248 states and 29356 transitions. Word has length 820 [2023-04-01 23:01:08,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:01:08,681 INFO L495 AbstractCegarLoop]: Abstraction has 26248 states and 29356 transitions. [2023-04-01 23:01:08,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 87.36363636363636) internal successors, (961), 9 states have internal predecessors, (961), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:01:08,682 INFO L276 IsEmpty]: Start isEmpty. Operand 26248 states and 29356 transitions. [2023-04-01 23:01:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2023-04-01 23:01:08,705 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:01:08,705 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:01:08,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 23:01:08,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 23:01:08,912 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:01:08,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:01:08,913 INFO L85 PathProgramCache]: Analyzing trace with hash 727556389, now seen corresponding path program 1 times [2023-04-01 23:01:08,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:01:08,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929114059] [2023-04-01 23:01:08,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:01:08,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:01:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:10,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:01:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:10,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:01:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:10,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:01:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:10,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2023-04-01 23:01:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:10,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 684 [2023-04-01 23:01:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 429 proven. 67 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2023-04-01 23:01:10,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:01:10,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929114059] [2023-04-01 23:01:10,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929114059] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:01:10,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114739688] [2023-04-01 23:01:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:01:10,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:01:10,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:01:10,702 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:01:10,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 23:01:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:10,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 23:01:10,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:01:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 258 proven. 10 refuted. 0 times theorem prover too weak. 827 trivial. 0 not checked. [2023-04-01 23:01:12,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:01:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 497 proven. 2 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2023-04-01 23:01:12,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114739688] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:01:12,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:01:12,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 16 [2023-04-01 23:01:12,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074154925] [2023-04-01 23:01:12,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:01:12,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 23:01:12,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:01:12,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 23:01:12,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-04-01 23:01:12,703 INFO L87 Difference]: Start difference. First operand 26248 states and 29356 transitions. Second operand has 16 states, 15 states have (on average 56.6) internal successors, (849), 14 states have internal predecessors, (849), 7 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 23:01:20,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:01:20,353 INFO L93 Difference]: Finished difference Result 70138 states and 78606 transitions. [2023-04-01 23:01:20,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 23:01:20,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 56.6) internal successors, (849), 14 states have internal predecessors, (849), 7 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 827 [2023-04-01 23:01:20,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:01:20,413 INFO L225 Difference]: With dead ends: 70138 [2023-04-01 23:01:20,413 INFO L226 Difference]: Without dead ends: 32142 [2023-04-01 23:01:20,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1719 GetRequests, 1679 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=368, Invalid=1272, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 23:01:20,451 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 3447 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 7887 mSolverCounterSat, 942 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 8829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 942 IncrementalHoareTripleChecker+Valid, 7887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:01:20,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 318 Invalid, 8829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [942 Valid, 7887 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-04-01 23:01:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32142 states. [2023-04-01 23:01:20,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32142 to 28060. [2023-04-01 23:01:20,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28060 states, 27407 states have (on average 1.0275841938190973) internal successors, (28163), 27698 states have internal predecessors, (28163), 180 states have call successors, (180), 180 states have call predecessors, (180), 472 states have return successors, (899), 181 states have call predecessors, (899), 179 states have call successors, (899) [2023-04-01 23:01:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28060 states to 28060 states and 29242 transitions. [2023-04-01 23:01:20,938 INFO L78 Accepts]: Start accepts. Automaton has 28060 states and 29242 transitions. Word has length 827 [2023-04-01 23:01:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:01:20,939 INFO L495 AbstractCegarLoop]: Abstraction has 28060 states and 29242 transitions. [2023-04-01 23:01:20,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 56.6) internal successors, (849), 14 states have internal predecessors, (849), 7 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 23:01:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand 28060 states and 29242 transitions. [2023-04-01 23:01:20,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2023-04-01 23:01:20,951 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:01:20,952 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:01:20,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 23:01:21,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-01 23:01:21,154 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:01:21,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:01:21,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1717502388, now seen corresponding path program 1 times [2023-04-01 23:01:21,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:01:21,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27063143] [2023-04-01 23:01:21,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:01:21,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:01:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:22,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:01:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:22,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:01:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:22,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:01:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:22,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2023-04-01 23:01:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:22,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 684 [2023-04-01 23:01:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 438 proven. 67 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2023-04-01 23:01:22,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:01:22,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27063143] [2023-04-01 23:01:22,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27063143] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:01:22,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080994215] [2023-04-01 23:01:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:01:22,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:01:22,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:01:22,921 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:01:22,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 23:01:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:23,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:01:23,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:01:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 253 proven. 0 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2023-04-01 23:01:23,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:01:23,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080994215] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:01:23,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:01:23,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 23:01:23,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131056825] [2023-04-01 23:01:23,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:01:23,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:01:23,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:01:23,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:01:23,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:01:23,343 INFO L87 Difference]: Start difference. First operand 28060 states and 29242 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:01:24,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:01:24,612 INFO L93 Difference]: Finished difference Result 58897 states and 61342 transitions. [2023-04-01 23:01:24,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:01:24,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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 830 [2023-04-01 23:01:24,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:01:24,669 INFO L225 Difference]: With dead ends: 58897 [2023-04-01 23:01:24,669 INFO L226 Difference]: Without dead ends: 29904 [2023-04-01 23:01:24,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 839 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:01:24,700 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 246 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:01:24,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 479 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 23:01:24,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29904 states. [2023-04-01 23:01:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29904 to 29284. [2023-04-01 23:01:25,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29284 states, 28617 states have (on average 1.026732361882797) internal successors, (29382), 28906 states have internal predecessors, (29382), 188 states have call successors, (188), 188 states have call predecessors, (188), 478 states have return successors, (927), 189 states have call predecessors, (927), 187 states have call successors, (927) [2023-04-01 23:01:25,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29284 states to 29284 states and 30497 transitions. [2023-04-01 23:01:25,196 INFO L78 Accepts]: Start accepts. Automaton has 29284 states and 30497 transitions. Word has length 830 [2023-04-01 23:01:25,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:01:25,197 INFO L495 AbstractCegarLoop]: Abstraction has 29284 states and 30497 transitions. [2023-04-01 23:01:25,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:01:25,197 INFO L276 IsEmpty]: Start isEmpty. Operand 29284 states and 30497 transitions. [2023-04-01 23:01:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 850 [2023-04-01 23:01:25,211 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:01:25,211 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:01:25,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 23:01:25,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-01 23:01:25,418 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:01:25,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:01:25,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1369529365, now seen corresponding path program 1 times [2023-04-01 23:01:25,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:01:25,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993475486] [2023-04-01 23:01:25,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:01:25,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:01:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:26,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:01:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:26,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:01:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:27,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:01:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:27,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 475 [2023-04-01 23:01:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:27,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 561 [2023-04-01 23:01:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 408 proven. 605 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-01 23:01:27,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:01:27,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993475486] [2023-04-01 23:01:27,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993475486] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:01:27,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925398638] [2023-04-01 23:01:27,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:01:27,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:01:27,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:01:27,499 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:01:27,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 23:01:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:27,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 23:01:27,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:01:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 695 proven. 60 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-04-01 23:01:28,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:01:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 753 proven. 2 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-04-01 23:01:30,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925398638] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:01:30,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:01:30,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 19 [2023-04-01 23:01:30,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799990100] [2023-04-01 23:01:30,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:01:30,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 23:01:30,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:01:30,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 23:01:30,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-04-01 23:01:30,102 INFO L87 Difference]: Start difference. First operand 29284 states and 30497 transitions. Second operand has 19 states, 19 states have (on average 73.05263157894737) internal successors, (1388), 17 states have internal predecessors, (1388), 8 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 23:01:37,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:01:37,906 INFO L93 Difference]: Finished difference Result 76303 states and 79615 transitions. [2023-04-01 23:01:37,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 23:01:37,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 73.05263157894737) internal successors, (1388), 17 states have internal predecessors, (1388), 8 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 849 [2023-04-01 23:01:37,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:01:37,982 INFO L225 Difference]: With dead ends: 76303 [2023-04-01 23:01:37,982 INFO L226 Difference]: Without dead ends: 46090 [2023-04-01 23:01:38,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1792 GetRequests, 1732 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=798, Invalid=2984, Unknown=0, NotChecked=0, Total=3782 [2023-04-01 23:01:38,001 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 5733 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 8082 mSolverCounterSat, 1180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5737 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 9262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1180 IncrementalHoareTripleChecker+Valid, 8082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:01:38,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5737 Valid, 278 Invalid, 9262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1180 Valid, 8082 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-04-01 23:01:38,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46090 states. [2023-04-01 23:01:38,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46090 to 37114. [2023-04-01 23:01:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37114 states, 36282 states have (on average 1.0245851937599912) internal successors, (37174), 36635 states have internal predecessors, (37174), 238 states have call successors, (238), 238 states have call predecessors, (238), 593 states have return successors, (1104), 240 states have call predecessors, (1104), 237 states have call successors, (1104) [2023-04-01 23:01:38,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37114 states to 37114 states and 38516 transitions. [2023-04-01 23:01:38,594 INFO L78 Accepts]: Start accepts. Automaton has 37114 states and 38516 transitions. Word has length 849 [2023-04-01 23:01:38,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:01:38,594 INFO L495 AbstractCegarLoop]: Abstraction has 37114 states and 38516 transitions. [2023-04-01 23:01:38,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 73.05263157894737) internal successors, (1388), 17 states have internal predecessors, (1388), 8 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 23:01:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 37114 states and 38516 transitions. [2023-04-01 23:01:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2023-04-01 23:01:38,615 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:01:38,616 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:01:38,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 23:01:38,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 23:01:38,824 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:01:38,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:01:38,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1513710098, now seen corresponding path program 1 times [2023-04-01 23:01:38,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:01:38,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034637194] [2023-04-01 23:01:38,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:01:38,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:01:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:39,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:01:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:39,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:01:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:39,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:01:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:39,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2023-04-01 23:01:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:39,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 684 [2023-04-01 23:01:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 249 proven. 4 refuted. 0 times theorem prover too weak. 989 trivial. 0 not checked. [2023-04-01 23:01:39,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:01:39,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034637194] [2023-04-01 23:01:39,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034637194] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:01:39,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066068457] [2023-04-01 23:01:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:01:39,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:01:39,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:01:39,716 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:01:39,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 23:01:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:39,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:01:39,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:01:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 253 proven. 0 refuted. 0 times theorem prover too weak. 989 trivial. 0 not checked. [2023-04-01 23:01:40,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:01:40,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066068457] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:01:40,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:01:40,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:01:40,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188691733] [2023-04-01 23:01:40,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:01:40,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:01:40,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:01:40,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:01:40,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:01:40,084 INFO L87 Difference]: Start difference. First operand 37114 states and 38516 transitions. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:01:41,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:01:41,070 INFO L93 Difference]: Finished difference Result 67661 states and 70301 transitions. [2023-04-01 23:01:41,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:01:41,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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 878 [2023-04-01 23:01:41,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:01:41,120 INFO L225 Difference]: With dead ends: 67661 [2023-04-01 23:01:41,121 INFO L226 Difference]: Without dead ends: 30860 [2023-04-01 23:01:41,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 887 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:01:41,150 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 297 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:01:41,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 416 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 23:01:41,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30860 states. [2023-04-01 23:01:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30860 to 30860. [2023-04-01 23:01:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30860 states, 30157 states have (on average 1.0254998839407103) internal successors, (30926), 30461 states have internal predecessors, (30926), 198 states have call successors, (198), 198 states have call predecessors, (198), 504 states have return successors, (949), 200 states have call predecessors, (949), 197 states have call successors, (949) [2023-04-01 23:01:41,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30860 states to 30860 states and 32073 transitions. [2023-04-01 23:01:41,849 INFO L78 Accepts]: Start accepts. Automaton has 30860 states and 32073 transitions. Word has length 878 [2023-04-01 23:01:41,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:01:41,849 INFO L495 AbstractCegarLoop]: Abstraction has 30860 states and 32073 transitions. [2023-04-01 23:01:41,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:01:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 30860 states and 32073 transitions. [2023-04-01 23:01:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2023-04-01 23:01:41,880 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:01:41,881 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:01:41,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-01 23:01:42,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:01:42,088 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:01:42,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:01:42,088 INFO L85 PathProgramCache]: Analyzing trace with hash -249576644, now seen corresponding path program 1 times [2023-04-01 23:01:42,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:01:42,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308233494] [2023-04-01 23:01:42,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:01:42,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:01:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:42,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:01:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:42,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:01:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:42,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:01:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:42,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 487 [2023-04-01 23:01:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:42,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 586 [2023-04-01 23:01:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:43,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 700 [2023-04-01 23:01:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:43,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 857 [2023-04-01 23:01:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2022 backedges. 718 proven. 193 refuted. 0 times theorem prover too weak. 1111 trivial. 0 not checked. [2023-04-01 23:01:43,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:01:43,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308233494] [2023-04-01 23:01:43,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308233494] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:01:43,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950663738] [2023-04-01 23:01:43,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:01:43,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:01:43,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:01:43,107 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:01:43,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 23:01:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:43,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 1352 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 23:01:43,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:01:45,578 WARN L861 $PredicateComparison]: unable to prove that (or (exists ((v_y_35 Int) (v_z_35 Int)) (let ((.cse0 (+ (* v_y_35 10) (* v_z_35 9)))) (and (<= |c_old(~a29~0)| .cse0) (<= 0 v_z_35) (< .cse0 0) (< v_z_35 10) (<= (+ (div (* v_z_35 81) 10) 573487 (* v_y_35 9)) c_~a29~0)))) (<= (+ 573495 (* 9 (div (+ |c_old(~a29~0)| (- 1)) 10))) c_~a29~0) (exists ((v_~a29~0_1052 Int)) (and (<= |c_old(~a29~0)| v_~a29~0_1052) (<= (+ 573486 (div (* 9 v_~a29~0_1052) 10)) c_~a29~0) (<= 0 v_~a29~0_1052)))) is different from true [2023-04-01 23:01:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2022 backedges. 733 proven. 58 refuted. 0 times theorem prover too weak. 1229 trivial. 2 not checked. [2023-04-01 23:01:46,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:01:46,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950663738] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:01:46,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:01:46,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-04-01 23:01:46,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112409952] [2023-04-01 23:01:46,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 23:01:46,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:01:46,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:01:46,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:01:46,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=101, Unknown=1, NotChecked=20, Total=156 [2023-04-01 23:01:46,477 INFO L87 Difference]: Start difference. First operand 30860 states and 32073 transitions. Second operand has 11 states, 11 states have (on average 56.09090909090909) internal successors, (617), 9 states have internal predecessors, (617), 5 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:02:05,024 WARN L223 SmtUtils]: Spent 12.21s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 23:02:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:02:09,735 INFO L93 Difference]: Finished difference Result 70981 states and 73920 transitions. [2023-04-01 23:02:09,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 23:02:09,735 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 56.09090909090909) internal successors, (617), 9 states have internal predecessors, (617), 5 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 1000 [2023-04-01 23:02:09,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:02:09,736 INFO L225 Difference]: With dead ends: 70981 [2023-04-01 23:02:09,736 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 23:02:09,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1135 GetRequests, 1096 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=332, Invalid=1230, Unknown=2, NotChecked=76, Total=1640 [2023-04-01 23:02:09,834 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 3769 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 6095 mSolverCounterSat, 353 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3772 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 9295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 6095 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 2846 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:02:09,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3772 Valid, 265 Invalid, 9295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 6095 Invalid, 1 Unknown, 2846 Unchecked, 6.4s Time] [2023-04-01 23:02:09,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 23:02:09,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 23:02:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 23:02:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 23:02:09,835 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1000 [2023-04-01 23:02:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:02:09,835 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 23:02:09,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 56.09090909090909) internal successors, (617), 9 states have internal predecessors, (617), 5 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:02:09,836 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 23:02:09,836 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 23:02:09,838 INFO L805 garLoopResultBuilder]: Registering result SAFE for location calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 23:02:09,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-01 23:02:10,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:02:10,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.