/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:27:46,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:27:46,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:27:46,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 20:27:46,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:27:46,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:27:46,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:27:46,935 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 20:27:46,948 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:27:46,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:27:46,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:27:46,949 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:27:46,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:27:46,949 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:27:46,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:27:46,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:27:46,950 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:27:46,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:27:46,950 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:27:46,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:27:46,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:27:46,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:27:46,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:27:46,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:27:46,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:27:46,951 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:27:46,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:27:46,951 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:27:46,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:27:46,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:27:46,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:27:46,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:27:46,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:27:46,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:27:46,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:27:46,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:27:46,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:27:46,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:27:46,952 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:27:46,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:27:46,952 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:27:46,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:27:46,952 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:27:46,953 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:27:47,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:27:47,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:27:47,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:27:47,118 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:27:47,118 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:27:47,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label29.c [2023-04-01 20:27:48,138 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:27:48,408 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:27:48,409 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label29.c [2023-04-01 20:27:48,422 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8961c80c4/6ec07c33af714e53a5580bff4f8b03c8/FLAG8c5750178 [2023-04-01 20:27:48,711 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8961c80c4/6ec07c33af714e53a5580bff4f8b03c8 [2023-04-01 20:27:48,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:27:48,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:27:48,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:27:48,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:27:48,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:27:48,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:27:48" (1/1) ... [2023-04-01 20:27:48,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43c185bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:48, skipping insertion in model container [2023-04-01 20:27:48,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:27:48" (1/1) ... [2023-04-01 20:27:48,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:27:48,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:27:49,245 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label29.c[58258,58271] [2023-04-01 20:27:49,266 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:27:49,275 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:27:49,429 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label29.c[58258,58271] [2023-04-01 20:27:49,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:27:49,449 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:27:49,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:49 WrapperNode [2023-04-01 20:27:49,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:27:49,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:27:49,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:27:49,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:27:49,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:49" (1/1) ... [2023-04-01 20:27:49,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:49" (1/1) ... [2023-04-01 20:27:49,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:49" (1/1) ... [2023-04-01 20:27:49,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:49" (1/1) ... [2023-04-01 20:27:49,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:49" (1/1) ... [2023-04-01 20:27:49,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:49" (1/1) ... [2023-04-01 20:27:49,587 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:49" (1/1) ... [2023-04-01 20:27:49,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:49" (1/1) ... [2023-04-01 20:27:49,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:27:49,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:27:49,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:27:49,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:27:49,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:49" (1/1) ... [2023-04-01 20:27:49,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:27:49,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:49,650 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 20:27:49,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 20:27:49,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:27:49,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:27:49,712 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:27:49,712 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 20:27:49,712 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:27:49,712 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 20:27:49,712 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:27:49,712 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:27:49,713 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:27:49,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:27:49,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:27:49,713 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 20:27:49,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:27:49,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:27:49,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:27:49,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:27:49,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:27:49,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:27:49,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:27:49,810 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:27:49,811 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:27:50,975 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:27:50,986 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:27:50,986 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 20:27:50,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:27:50 BoogieIcfgContainer [2023-04-01 20:27:50,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:27:50,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:27:50,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:27:50,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:27:50,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:27:48" (1/3) ... [2023-04-01 20:27:50,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d04b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:27:50, skipping insertion in model container [2023-04-01 20:27:50,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:27:49" (2/3) ... [2023-04-01 20:27:50,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d04b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:27:50, skipping insertion in model container [2023-04-01 20:27:50,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:27:50" (3/3) ... [2023-04-01 20:27:51,000 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label29.c [2023-04-01 20:27:51,012 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:27:51,012 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:27:51,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:27:51,060 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;@497710bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:27:51,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:27:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:27:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-04-01 20:27:51,085 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:51,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:27:51,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:51,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:51,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1852317466, now seen corresponding path program 1 times [2023-04-01 20:27:51,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:51,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236777598] [2023-04-01 20:27:51,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:51,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:52,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:27:52,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:52,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236777598] [2023-04-01 20:27:52,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236777598] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:52,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:27:52,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 20:27:52,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205862801] [2023-04-01 20:27:52,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:52,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:27:52,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:52,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:27:52,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:27:52,109 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 20:27:53,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:53,730 INFO L93 Difference]: Finished difference Result 858 states and 1518 transitions. [2023-04-01 20:27:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:27:53,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 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 184 [2023-04-01 20:27:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:53,740 INFO L225 Difference]: With dead ends: 858 [2023-04-01 20:27:53,740 INFO L226 Difference]: Without dead ends: 483 [2023-04-01 20:27:53,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:27:53,746 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 653 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:53,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 54 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 20:27:53,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-04-01 20:27:53,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 465. [2023-04-01 20:27:53,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 455 states have (on average 1.6087912087912088) internal successors, (732), 457 states have internal predecessors, (732), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:27:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 743 transitions. [2023-04-01 20:27:53,794 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 743 transitions. Word has length 184 [2023-04-01 20:27:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:53,794 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 743 transitions. [2023-04-01 20:27:53,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 20:27:53,795 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 743 transitions. [2023-04-01 20:27:53,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-04-01 20:27:53,797 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:53,797 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:27:53,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:27:53,798 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:53,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:53,798 INFO L85 PathProgramCache]: Analyzing trace with hash 564215558, now seen corresponding path program 1 times [2023-04-01 20:27:53,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:53,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486581261] [2023-04-01 20:27:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:53,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:54,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:54,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:27:54,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:54,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486581261] [2023-04-01 20:27:54,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486581261] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:54,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:27:54,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:27:54,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324464031] [2023-04-01 20:27:54,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:54,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:27:54,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:54,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:27:54,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:27:54,232 INFO L87 Difference]: Start difference. First operand 465 states and 743 transitions. Second operand has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 4 states have internal predecessors, (187), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:27:55,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:55,654 INFO L93 Difference]: Finished difference Result 1398 states and 2265 transitions. [2023-04-01 20:27:55,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:27:55,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 4 states have internal predecessors, (187), 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 193 [2023-04-01 20:27:55,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:55,672 INFO L225 Difference]: With dead ends: 1398 [2023-04-01 20:27:55,672 INFO L226 Difference]: Without dead ends: 939 [2023-04-01 20:27:55,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:27:55,674 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1309 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1309 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:55,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1309 Valid, 122 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 20:27:55,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2023-04-01 20:27:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 916. [2023-04-01 20:27:55,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 896 states have (on average 1.5223214285714286) internal successors, (1364), 904 states have internal predecessors, (1364), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-04-01 20:27:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1395 transitions. [2023-04-01 20:27:55,706 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1395 transitions. Word has length 193 [2023-04-01 20:27:55,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:55,706 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1395 transitions. [2023-04-01 20:27:55,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 4 states have internal predecessors, (187), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:27:55,706 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1395 transitions. [2023-04-01 20:27:55,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-04-01 20:27:55,708 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:55,708 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:27:55,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:27:55,709 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:55,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:55,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1065471074, now seen corresponding path program 1 times [2023-04-01 20:27:55,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:55,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66220013] [2023-04-01 20:27:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:55,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:56,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:56,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:27:56,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:56,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66220013] [2023-04-01 20:27:56,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66220013] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:56,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158296008] [2023-04-01 20:27:56,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:56,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:56,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:56,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:27:56,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 20:27:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:56,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:27:56,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 20:27:56,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:27:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 20:27:56,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158296008] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:56,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 20:27:56,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2023-04-01 20:27:56,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156006060] [2023-04-01 20:27:56,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:56,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:27:56,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:56,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:27:56,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:27:56,742 INFO L87 Difference]: Start difference. First operand 916 states and 1395 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 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 20:27:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:57,382 INFO L93 Difference]: Finished difference Result 2716 states and 4210 transitions. [2023-04-01 20:27:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 20:27:57,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 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 195 [2023-04-01 20:27:57,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:57,389 INFO L225 Difference]: With dead ends: 2716 [2023-04-01 20:27:57,389 INFO L226 Difference]: Without dead ends: 1806 [2023-04-01 20:27:57,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 388 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:27:57,391 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 305 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:57,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 169 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 20:27:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2023-04-01 20:27:57,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1783. [2023-04-01 20:27:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1741 states have (on average 1.5037334865020104) internal successors, (2618), 1763 states have internal predecessors, (2618), 10 states have call successors, (10), 10 states have call predecessors, (10), 31 states have return successors, (103), 9 states have call predecessors, (103), 9 states have call successors, (103) [2023-04-01 20:27:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2731 transitions. [2023-04-01 20:27:57,461 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2731 transitions. Word has length 195 [2023-04-01 20:27:57,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:57,462 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2731 transitions. [2023-04-01 20:27:57,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 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 20:27:57,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2731 transitions. [2023-04-01 20:27:57,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-04-01 20:27:57,467 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:57,468 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:27:57,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 20:27:57,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:57,674 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:57,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:57,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1091015446, now seen corresponding path program 1 times [2023-04-01 20:27:57,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:57,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293188990] [2023-04-01 20:27:57,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:57,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:58,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:58,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:58,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-04-01 20:27:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 20:27:58,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:58,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293188990] [2023-04-01 20:27:58,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293188990] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:58,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224325192] [2023-04-01 20:27:58,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:58,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:58,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:58,198 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:27:58,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 20:27:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:58,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 20:27:58,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 20:27:58,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:27:58,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224325192] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:58,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:27:58,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-04-01 20:27:58,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866789040] [2023-04-01 20:27:58,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:58,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:27:58,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:58,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:27:58,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 20:27:58,486 INFO L87 Difference]: Start difference. First operand 1783 states and 2731 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:27:58,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:58,798 INFO L93 Difference]: Finished difference Result 3560 states and 5464 transitions. [2023-04-01 20:27:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:27:58,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 205 [2023-04-01 20:27:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:58,804 INFO L225 Difference]: With dead ends: 3560 [2023-04-01 20:27:58,805 INFO L226 Difference]: Without dead ends: 1783 [2023-04-01 20:27:58,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 20:27:58,808 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 389 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:58,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 62 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:27:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2023-04-01 20:27:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1783. [2023-04-01 20:27:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1741 states have (on average 1.5025847214244687) internal successors, (2616), 1763 states have internal predecessors, (2616), 10 states have call successors, (10), 10 states have call predecessors, (10), 31 states have return successors, (103), 9 states have call predecessors, (103), 9 states have call successors, (103) [2023-04-01 20:27:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2729 transitions. [2023-04-01 20:27:58,852 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2729 transitions. Word has length 205 [2023-04-01 20:27:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:58,853 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2729 transitions. [2023-04-01 20:27:58,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:27:58,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2729 transitions. [2023-04-01 20:27:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-04-01 20:27:58,862 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:58,862 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:27:58,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 20:27:59,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 20:27:59,069 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:59,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:59,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1164600024, now seen corresponding path program 1 times [2023-04-01 20:27:59,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:59,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96853354] [2023-04-01 20:27:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:59,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:59,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:59,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:59,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-04-01 20:27:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:27:59,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:59,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96853354] [2023-04-01 20:27:59,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96853354] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:59,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255539045] [2023-04-01 20:27:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:59,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:59,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:59,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:27:59,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 20:27:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:59,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:27:59,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:27:59,842 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:27:59,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255539045] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:59,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:27:59,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:27:59,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715392433] [2023-04-01 20:27:59,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:59,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:27:59,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:59,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:27:59,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:27:59,844 INFO L87 Difference]: Start difference. First operand 1783 states and 2729 transitions. Second operand has 5 states, 5 states have (on average 38.0) internal successors, (190), 4 states have internal predecessors, (190), 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 20:28:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:28:00,643 INFO L93 Difference]: Finished difference Result 5430 states and 8889 transitions. [2023-04-01 20:28:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 20:28:00,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.0) internal successors, (190), 4 states have internal predecessors, (190), 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 205 [2023-04-01 20:28:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:28:00,658 INFO L225 Difference]: With dead ends: 5430 [2023-04-01 20:28:00,659 INFO L226 Difference]: Without dead ends: 3653 [2023-04-01 20:28:00,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:28:00,663 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 861 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:28:00,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 152 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:28:00,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3653 states. [2023-04-01 20:28:00,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3653 to 3593. [2023-04-01 20:28:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3471 states have (on average 1.4203399596658024) internal successors, (4930), 3557 states have internal predecessors, (4930), 18 states have call successors, (18), 18 states have call predecessors, (18), 103 states have return successors, (478), 17 states have call predecessors, (478), 17 states have call successors, (478) [2023-04-01 20:28:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 5426 transitions. [2023-04-01 20:28:00,809 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 5426 transitions. Word has length 205 [2023-04-01 20:28:00,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:28:00,810 INFO L495 AbstractCegarLoop]: Abstraction has 3593 states and 5426 transitions. [2023-04-01 20:28:00,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.0) internal successors, (190), 4 states have internal predecessors, (190), 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 20:28:00,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 5426 transitions. [2023-04-01 20:28:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-04-01 20:28:00,817 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:28:00,817 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:28:00,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 20:28:01,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:01,024 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:28:01,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:28:01,025 INFO L85 PathProgramCache]: Analyzing trace with hash -901799765, now seen corresponding path program 1 times [2023-04-01 20:28:01,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:28:01,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759813181] [2023-04-01 20:28:01,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:01,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:28:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:01,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:28:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:01,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:28:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:01,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 20:28:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:28:01,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:28:01,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759813181] [2023-04-01 20:28:01,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759813181] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:28:01,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722520081] [2023-04-01 20:28:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:01,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:01,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:28:01,797 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:28:01,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 20:28:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:02,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:28:02,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:28:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 20:28:02,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:28:02,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722520081] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:28:02,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:28:02,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:28:02,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756998256] [2023-04-01 20:28:02,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:28:02,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:28:02,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:28:02,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:28:02,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:28:02,108 INFO L87 Difference]: Start difference. First operand 3593 states and 5426 transitions. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 4 states have internal predecessors, (195), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:28:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:28:02,451 INFO L93 Difference]: Finished difference Result 10869 states and 17227 transitions. [2023-04-01 20:28:02,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:28:02,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 4 states have internal predecessors, (195), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 207 [2023-04-01 20:28:02,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:28:02,480 INFO L225 Difference]: With dead ends: 10869 [2023-04-01 20:28:02,480 INFO L226 Difference]: Without dead ends: 7282 [2023-04-01 20:28:02,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:28:02,532 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 1090 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:28:02,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1090 Valid, 916 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:28:02,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7282 states. [2023-04-01 20:28:02,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7282 to 7212. [2023-04-01 20:28:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7212 states, 6947 states have (on average 1.4185979559522095) internal successors, (9855), 7144 states have internal predecessors, (9855), 34 states have call successors, (34), 34 states have call predecessors, (34), 230 states have return successors, (1211), 33 states have call predecessors, (1211), 33 states have call successors, (1211) [2023-04-01 20:28:02,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7212 states to 7212 states and 11100 transitions. [2023-04-01 20:28:02,701 INFO L78 Accepts]: Start accepts. Automaton has 7212 states and 11100 transitions. Word has length 207 [2023-04-01 20:28:02,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:28:02,701 INFO L495 AbstractCegarLoop]: Abstraction has 7212 states and 11100 transitions. [2023-04-01 20:28:02,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 4 states have internal predecessors, (195), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:28:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 7212 states and 11100 transitions. [2023-04-01 20:28:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-04-01 20:28:02,714 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:28:02,714 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:28:02,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 20:28:02,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:02,920 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:28:02,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:28:02,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1392050262, now seen corresponding path program 1 times [2023-04-01 20:28:02,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:28:02,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472401295] [2023-04-01 20:28:02,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:02,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:28:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:03,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:28:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:03,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:28:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:28:03,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:28:03,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472401295] [2023-04-01 20:28:03,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472401295] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:28:03,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:28:03,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:28:03,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918702233] [2023-04-01 20:28:03,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:28:03,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:28:03,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:28:03,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:28:03,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:28:03,714 INFO L87 Difference]: Start difference. First operand 7212 states and 11100 transitions. Second operand has 7 states, 6 states have (on average 33.5) internal successors, (201), 4 states have internal predecessors, (201), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:28:05,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:28:05,212 INFO L93 Difference]: Finished difference Result 16563 states and 26047 transitions. [2023-04-01 20:28:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:28:05,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 33.5) internal successors, (201), 4 states have internal predecessors, (201), 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 207 [2023-04-01 20:28:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:28:05,253 INFO L225 Difference]: With dead ends: 16563 [2023-04-01 20:28:05,253 INFO L226 Difference]: Without dead ends: 9357 [2023-04-01 20:28:05,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:28:05,267 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1113 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 20:28:05,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 150 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1699 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 20:28:05,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9357 states. [2023-04-01 20:28:05,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9357 to 9199. [2023-04-01 20:28:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9199 states, 8858 states have (on average 1.4077669902912622) internal successors, (12470), 9113 states have internal predecessors, (12470), 43 states have call successors, (43), 43 states have call predecessors, (43), 297 states have return successors, (1784), 42 states have call predecessors, (1784), 42 states have call successors, (1784) [2023-04-01 20:28:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9199 states to 9199 states and 14297 transitions. [2023-04-01 20:28:05,563 INFO L78 Accepts]: Start accepts. Automaton has 9199 states and 14297 transitions. Word has length 207 [2023-04-01 20:28:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:28:05,563 INFO L495 AbstractCegarLoop]: Abstraction has 9199 states and 14297 transitions. [2023-04-01 20:28:05,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 33.5) internal successors, (201), 4 states have internal predecessors, (201), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:28:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 9199 states and 14297 transitions. [2023-04-01 20:28:05,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-04-01 20:28:05,580 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:28:05,580 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:28:05,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 20:28:05,581 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:28:05,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:28:05,581 INFO L85 PathProgramCache]: Analyzing trace with hash 974018759, now seen corresponding path program 1 times [2023-04-01 20:28:05,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:28:05,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968760827] [2023-04-01 20:28:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:05,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:28:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:06,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:28:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:06,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:28:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:06,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 20:28:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:28:06,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:28:06,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968760827] [2023-04-01 20:28:06,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968760827] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:28:06,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354978352] [2023-04-01 20:28:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:06,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:06,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:28:06,278 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:28:06,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 20:28:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:06,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:28:06,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:28:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:28:06,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:28:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:28:06,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354978352] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:28:06,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:28:06,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:28:06,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843833845] [2023-04-01 20:28:06,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:28:06,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:28:06,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:28:06,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:28:06,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:28:06,536 INFO L87 Difference]: Start difference. First operand 9199 states and 14297 transitions. Second operand has 12 states, 12 states have (on average 18.666666666666668) internal successors, (224), 10 states have internal predecessors, (224), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:28:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:28:12,071 INFO L93 Difference]: Finished difference Result 45089 states and 89399 transitions. [2023-04-01 20:28:12,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-04-01 20:28:12,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 18.666666666666668) internal successors, (224), 10 states have internal predecessors, (224), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 209 [2023-04-01 20:28:12,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:28:12,305 INFO L225 Difference]: With dead ends: 45089 [2023-04-01 20:28:12,306 INFO L226 Difference]: Without dead ends: 36103 [2023-04-01 20:28:12,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 450 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 20:28:12,333 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 2359 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 5569 mSolverCounterSat, 861 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2361 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 6430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 861 IncrementalHoareTripleChecker+Valid, 5569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:28:12,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2361 Valid, 327 Invalid, 6430 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [861 Valid, 5569 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 20:28:12,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36103 states. [2023-04-01 20:28:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36103 to 34279. [2023-04-01 20:28:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34279 states, 33236 states have (on average 1.3127030930316523) internal successors, (43629), 33932 states have internal predecessors, (43629), 188 states have call successors, (188), 159 states have call predecessors, (188), 854 states have return successors, (10177), 187 states have call predecessors, (10177), 187 states have call successors, (10177) [2023-04-01 20:28:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34279 states to 34279 states and 53994 transitions. [2023-04-01 20:28:13,421 INFO L78 Accepts]: Start accepts. Automaton has 34279 states and 53994 transitions. Word has length 209 [2023-04-01 20:28:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:28:13,421 INFO L495 AbstractCegarLoop]: Abstraction has 34279 states and 53994 transitions. [2023-04-01 20:28:13,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.666666666666668) internal successors, (224), 10 states have internal predecessors, (224), 4 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 20:28:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 34279 states and 53994 transitions. [2023-04-01 20:28:13,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-01 20:28:13,506 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:28:13,506 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:28:13,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 20:28:13,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:13,712 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:28:13,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:28:13,713 INFO L85 PathProgramCache]: Analyzing trace with hash -759222198, now seen corresponding path program 1 times [2023-04-01 20:28:13,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:28:13,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888649596] [2023-04-01 20:28:13,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:13,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:28:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:14,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:28:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:14,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:28:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:14,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:28:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:28:14,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:28:14,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888649596] [2023-04-01 20:28:14,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888649596] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:28:14,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972933975] [2023-04-01 20:28:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:14,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:14,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:28:14,803 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:28:14,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 20:28:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:14,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:28:15,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:28:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:28:15,193 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:28:15,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972933975] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:28:15,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:28:15,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-04-01 20:28:15,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891736340] [2023-04-01 20:28:15,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:28:15,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:28:15,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:28:15,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:28:15,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:28:15,195 INFO L87 Difference]: Start difference. First operand 34279 states and 53994 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:28:16,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:28:16,199 INFO L93 Difference]: Finished difference Result 67321 states and 105618 transitions. [2023-04-01 20:28:16,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:28:16,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 230 [2023-04-01 20:28:16,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:28:16,295 INFO L225 Difference]: With dead ends: 67321 [2023-04-01 20:28:16,295 INFO L226 Difference]: Without dead ends: 33259 [2023-04-01 20:28:16,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:28:16,355 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 106 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:28:16,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 408 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:28:16,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33259 states. [2023-04-01 20:28:17,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33259 to 33247. [2023-04-01 20:28:17,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33247 states, 32284 states have (on average 1.238353363895428) internal successors, (39979), 32914 states have internal predecessors, (39979), 178 states have call successors, (178), 155 states have call predecessors, (178), 784 states have return successors, (7605), 177 states have call predecessors, (7605), 177 states have call successors, (7605) [2023-04-01 20:28:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33247 states to 33247 states and 47762 transitions. [2023-04-01 20:28:17,387 INFO L78 Accepts]: Start accepts. Automaton has 33247 states and 47762 transitions. Word has length 230 [2023-04-01 20:28:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:28:17,387 INFO L495 AbstractCegarLoop]: Abstraction has 33247 states and 47762 transitions. [2023-04-01 20:28:17,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:28:17,388 INFO L276 IsEmpty]: Start isEmpty. Operand 33247 states and 47762 transitions. [2023-04-01 20:28:17,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-01 20:28:17,441 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:28:17,441 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:28:17,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 20:28:17,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:17,658 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:28:17,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:28:17,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1602340515, now seen corresponding path program 1 times [2023-04-01 20:28:17,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:28:17,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565240883] [2023-04-01 20:28:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:17,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:28:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:18,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:28:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:18,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:28:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:18,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:28:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:18,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 20:28:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:18,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-04-01 20:28:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 73 proven. 15 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-04-01 20:28:18,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:28:18,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565240883] [2023-04-01 20:28:18,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565240883] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:28:18,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180160326] [2023-04-01 20:28:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:18,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:18,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:28:18,122 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:28:18,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 20:28:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:18,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:28:18,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:28:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 20:28:18,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:28:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-01 20:28:18,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180160326] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:28:18,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:28:18,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:28:18,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524582442] [2023-04-01 20:28:18,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:28:18,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:28:18,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:28:18,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:28:18,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:28:18,540 INFO L87 Difference]: Start difference. First operand 33247 states and 47762 transitions. Second operand has 12 states, 12 states have (on average 21.0) internal successors, (252), 10 states have internal predecessors, (252), 4 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 20:28:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:28:20,973 INFO L93 Difference]: Finished difference Result 85348 states and 123294 transitions. [2023-04-01 20:28:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 20:28:20,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.0) internal successors, (252), 10 states have internal predecessors, (252), 4 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 250 [2023-04-01 20:28:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:28:21,120 INFO L225 Difference]: With dead ends: 85348 [2023-04-01 20:28:21,120 INFO L226 Difference]: Without dead ends: 52318 [2023-04-01 20:28:21,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 513 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2023-04-01 20:28:21,289 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1950 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1950 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:28:21,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1950 Valid, 138 Invalid, 2290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 20:28:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52318 states. [2023-04-01 20:28:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52318 to 51226. [2023-04-01 20:28:22,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51226 states, 50058 states have (on average 1.1952734827599985) internal successors, (59833), 50732 states have internal predecessors, (59833), 252 states have call successors, (252), 242 states have call predecessors, (252), 915 states have return successors, (8410), 251 states have call predecessors, (8410), 251 states have call successors, (8410) [2023-04-01 20:28:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51226 states to 51226 states and 68495 transitions. [2023-04-01 20:28:22,336 INFO L78 Accepts]: Start accepts. Automaton has 51226 states and 68495 transitions. Word has length 250 [2023-04-01 20:28:22,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:28:22,336 INFO L495 AbstractCegarLoop]: Abstraction has 51226 states and 68495 transitions. [2023-04-01 20:28:22,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.0) internal successors, (252), 10 states have internal predecessors, (252), 4 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 20:28:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 51226 states and 68495 transitions. [2023-04-01 20:28:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-01 20:28:22,395 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:28:22,396 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:28:22,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 20:28:22,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:22,602 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:28:22,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:28:22,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1325634811, now seen corresponding path program 1 times [2023-04-01 20:28:22,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:28:22,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117129551] [2023-04-01 20:28:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:22,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:28:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:23,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:28:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:23,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:28:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:23,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 20:28:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:23,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-04-01 20:28:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:28:23,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:28:23,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117129551] [2023-04-01 20:28:23,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117129551] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:28:23,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555409957] [2023-04-01 20:28:23,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:23,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:23,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:28:23,586 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:28:23,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 20:28:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:23,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:28:23,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:28:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:28:23,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:28:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:28:23,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555409957] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:28:23,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:28:23,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:28:23,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565651153] [2023-04-01 20:28:23,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:28:23,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:28:23,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:28:23,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:28:23,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:28:23,887 INFO L87 Difference]: Start difference. First operand 51226 states and 68495 transitions. Second operand has 12 states, 12 states have (on average 24.083333333333332) internal successors, (289), 10 states have internal predecessors, (289), 4 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 20:28:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:28:28,361 INFO L93 Difference]: Finished difference Result 130902 states and 179310 transitions. [2023-04-01 20:28:28,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 20:28:28,361 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 24.083333333333332) internal successors, (289), 10 states have internal predecessors, (289), 4 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 250 [2023-04-01 20:28:28,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:28:28,560 INFO L225 Difference]: With dead ends: 130902 [2023-04-01 20:28:28,560 INFO L226 Difference]: Without dead ends: 79929 [2023-04-01 20:28:28,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 524 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 20:28:28,614 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2108 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 2738 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2108 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 3273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 2738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:28:28,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2108 Valid, 239 Invalid, 3273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 2738 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 20:28:28,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79929 states. [2023-04-01 20:28:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79929 to 78839. [2023-04-01 20:28:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78839 states, 77163 states have (on average 1.1581846221634722) internal successors, (89369), 78084 states have internal predecessors, (89369), 382 states have call successors, (382), 373 states have call predecessors, (382), 1293 states have return successors, (11180), 381 states have call predecessors, (11180), 381 states have call successors, (11180) [2023-04-01 20:28:30,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78839 states to 78839 states and 100931 transitions. [2023-04-01 20:28:30,735 INFO L78 Accepts]: Start accepts. Automaton has 78839 states and 100931 transitions. Word has length 250 [2023-04-01 20:28:30,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:28:30,735 INFO L495 AbstractCegarLoop]: Abstraction has 78839 states and 100931 transitions. [2023-04-01 20:28:30,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.083333333333332) internal successors, (289), 10 states have internal predecessors, (289), 4 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 20:28:30,735 INFO L276 IsEmpty]: Start isEmpty. Operand 78839 states and 100931 transitions. [2023-04-01 20:28:30,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-04-01 20:28:30,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:28:30,779 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:28:30,787 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 20:28:30,985 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,SelfDestructingSolverStorable10 [2023-04-01 20:28:30,985 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:28:30,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:28:30,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1844633526, now seen corresponding path program 1 times [2023-04-01 20:28:30,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:28:30,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079030693] [2023-04-01 20:28:30,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:30,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:28:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:31,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:28:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:31,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:28:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:31,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:28:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:31,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-04-01 20:28:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 80 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 20:28:31,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:28:31,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079030693] [2023-04-01 20:28:31,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079030693] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:28:31,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778120207] [2023-04-01 20:28:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:28:31,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:28:31,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:28:31,924 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 20:28:31,926 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 20:28:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:28:32,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 1246 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:28:32,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:28:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:28:32,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:28:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:28:32,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778120207] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:28:32,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:28:32,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2023-04-01 20:28:32,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722966841] [2023-04-01 20:28:32,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:28:32,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 20:28:32,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:28:32,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 20:28:32,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-04-01 20:28:32,368 INFO L87 Difference]: Start difference. First operand 78839 states and 100931 transitions. Second operand has 14 states, 14 states have (on average 23.0) internal successors, (322), 12 states have internal predecessors, (322), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:28:53,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:28:53,924 INFO L93 Difference]: Finished difference Result 287552 states and 490623 transitions. [2023-04-01 20:28:53,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-04-01 20:28:53,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 23.0) internal successors, (322), 12 states have internal predecessors, (322), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 264 [2023-04-01 20:28:53,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:28:55,361 INFO L225 Difference]: With dead ends: 287552 [2023-04-01 20:28:55,361 INFO L226 Difference]: Without dead ends: 208926 [2023-04-01 20:28:55,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 623 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9855 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2542, Invalid=21328, Unknown=0, NotChecked=0, Total=23870 [2023-04-01 20:28:55,578 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 6936 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 11732 mSolverCounterSat, 1766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6946 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 13498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1766 IncrementalHoareTripleChecker+Valid, 11732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:28:55,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6946 Valid, 598 Invalid, 13498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1766 Valid, 11732 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-04-01 20:28:55,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208926 states. [2023-04-01 20:29:01,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208926 to 192387. [2023-04-01 20:29:01,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192387 states, 187996 states have (on average 1.1013851358539544) internal successors, (207056), 189840 states have internal predecessors, (207056), 1650 states have call successors, (1650), 897 states have call predecessors, (1650), 2740 states have return successors, (33585), 1649 states have call predecessors, (33585), 1649 states have call successors, (33585) [2023-04-01 20:29:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192387 states to 192387 states and 242291 transitions. [2023-04-01 20:29:02,433 INFO L78 Accepts]: Start accepts. Automaton has 192387 states and 242291 transitions. Word has length 264 [2023-04-01 20:29:02,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:29:02,434 INFO L495 AbstractCegarLoop]: Abstraction has 192387 states and 242291 transitions. [2023-04-01 20:29:02,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.0) internal successors, (322), 12 states have internal predecessors, (322), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 20:29:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 192387 states and 242291 transitions. [2023-04-01 20:29:02,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2023-04-01 20:29:02,829 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:29:02,830 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:29:02,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 20:29:03,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:29:03,035 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:29:03,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:29:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1467778014, now seen corresponding path program 1 times [2023-04-01 20:29:03,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:29:03,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29572477] [2023-04-01 20:29:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:03,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:29:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:03,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:29:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:03,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:29:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:03,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:29:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:03,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-04-01 20:29:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:03,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-04-01 20:29:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 107 proven. 23 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 20:29:03,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:29:03,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29572477] [2023-04-01 20:29:03,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29572477] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:29:03,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974661079] [2023-04-01 20:29:03,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:03,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:29:03,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:29:03,835 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 20:29:03,837 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 20:29:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:29:04,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:29:04,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:29:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-04-01 20:29:04,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:29:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-04-01 20:29:04,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974661079] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:29:04,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:29:04,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-04-01 20:29:04,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419757362] [2023-04-01 20:29:04,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:29:04,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 20:29:04,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:29:04,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 20:29:04,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:29:04,168 INFO L87 Difference]: Start difference. First operand 192387 states and 242291 transitions. Second operand has 13 states, 13 states have (on average 22.692307692307693) internal successors, (295), 11 states have internal predecessors, (295), 5 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 20:29:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:29:36,881 INFO L93 Difference]: Finished difference Result 659098 states and 965673 transitions. [2023-04-01 20:29:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-04-01 20:29:36,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 22.692307692307693) internal successors, (295), 11 states have internal predecessors, (295), 5 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 277 [2023-04-01 20:29:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:29:40,371 INFO L225 Difference]: With dead ends: 659098 [2023-04-01 20:29:40,372 INFO L226 Difference]: Without dead ends: 468204 [2023-04-01 20:29:40,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 592 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=706, Invalid=3076, Unknown=0, NotChecked=0, Total=3782 [2023-04-01 20:29:40,887 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 3257 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 8104 mSolverCounterSat, 821 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3257 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 8925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 8104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:29:40,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3257 Valid, 308 Invalid, 8925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [821 Valid, 8104 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-04-01 20:29:41,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468204 states. [2023-04-01 20:29:56,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468204 to 439795. [2023-04-01 20:29:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439795 states, 429196 states have (on average 1.077325976942935) internal successors, (462384), 433261 states have internal predecessors, (462384), 4497 states have call successors, (4497), 2037 states have call predecessors, (4497), 6101 states have return successors, (77968), 4496 states have call predecessors, (77968), 4496 states have call successors, (77968) [2023-04-01 20:29:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439795 states to 439795 states and 544849 transitions. [2023-04-01 20:29:58,692 INFO L78 Accepts]: Start accepts. Automaton has 439795 states and 544849 transitions. Word has length 277 [2023-04-01 20:29:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:29:58,692 INFO L495 AbstractCegarLoop]: Abstraction has 439795 states and 544849 transitions. [2023-04-01 20:29:58,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 22.692307692307693) internal successors, (295), 11 states have internal predecessors, (295), 5 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 20:29:58,692 INFO L276 IsEmpty]: Start isEmpty. Operand 439795 states and 544849 transitions. [2023-04-01 20:29:59,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-04-01 20:29:59,086 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:29:59,086 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:29:59,092 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 20:29:59,292 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,SelfDestructingSolverStorable12 [2023-04-01 20:29:59,306 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:29:59,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:29:59,306 INFO L85 PathProgramCache]: Analyzing trace with hash 601814498, now seen corresponding path program 1 times [2023-04-01 20:29:59,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:29:59,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21817203] [2023-04-01 20:29:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:29:59,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:29:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:00,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:30:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:00,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:30:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:00,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-04-01 20:30:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:00,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 20:30:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 20:30:00,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:30:00,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21817203] [2023-04-01 20:30:00,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21817203] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:30:00,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858614839] [2023-04-01 20:30:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:30:00,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:30:00,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:30:00,262 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 20:30:00,263 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 20:30:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:30:00,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:30:00,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:30:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 20:30:00,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:30:00,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858614839] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:30:00,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:30:00,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 20:30:00,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876118254] [2023-04-01 20:30:00,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:30:00,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:30:00,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:30:00,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:30:00,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:30:00,707 INFO L87 Difference]: Start difference. First operand 439795 states and 544849 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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)