/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/Problem17_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:18:20,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:18:20,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:18:20,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 23:18:20,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 23:18:20,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 23:18:20,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 23:18:20,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 23:18:20,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 23:18:20,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 23:18:20,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 23:18:20,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 23:18:20,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 23:18:20,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 23:18:20,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 23:18:20,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 23:18:20,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 23:18:20,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:18:20,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:18:20,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:18:20,351 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 23:18:20,379 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:18:20,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:18:20,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:18:20,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:18:20,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:18:20,382 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:18:20,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:18:20,383 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:18:20,383 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:18:20,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:18:20,384 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:18:20,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:18:20,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:18:20,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:18:20,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:18:20,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:18:20,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:18:20,385 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:18:20,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:18:20,385 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:18:20,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:18:20,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:18:20,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:18:20,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:18:20,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:18:20,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:18:20,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:18:20,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:18:20,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:18:20,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:18:20,387 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:18:20,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:18:20,387 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:18:20,387 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:18:20,387 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:18:20,387 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:18:20,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:18:20,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:18:20,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:18:20,617 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:18:20,618 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:18:20,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label00.c [2023-04-01 23:18:21,789 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:18:22,181 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:18:22,182 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label00.c [2023-04-01 23:18:22,201 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e0dea6e9/5689d25183b74370b8dff4b6fa5a5071/FLAG8b6fa436b [2023-04-01 23:18:22,216 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e0dea6e9/5689d25183b74370b8dff4b6fa5a5071 [2023-04-01 23:18:22,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:18:22,220 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:18:22,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:18:22,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:18:22,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:18:22,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:18:22" (1/1) ... [2023-04-01 23:18:22,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@274b2233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:22, skipping insertion in model container [2023-04-01 23:18:22,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:18:22" (1/1) ... [2023-04-01 23:18:22,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:18:22,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:18:22,515 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/Problem17_label00.c[7994,8007] [2023-04-01 23:18:22,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:18:23,032 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:18:23,062 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/Problem17_label00.c[7994,8007] [2023-04-01 23:18:23,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:18:23,286 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:18:23,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:23 WrapperNode [2023-04-01 23:18:23,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:18:23,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:18:23,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:18:23,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:18:23,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:23" (1/1) ... [2023-04-01 23:18:23,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:23" (1/1) ... [2023-04-01 23:18:23,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:23" (1/1) ... [2023-04-01 23:18:23,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:23" (1/1) ... [2023-04-01 23:18:23,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:23" (1/1) ... [2023-04-01 23:18:23,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:23" (1/1) ... [2023-04-01 23:18:23,486 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:23" (1/1) ... [2023-04-01 23:18:23,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:23" (1/1) ... [2023-04-01 23:18:23,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:18:23,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:18:23,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:18:23,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:18:23,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:23" (1/1) ... [2023-04-01 23:18:23,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:18:23,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:18:23,546 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 23:18:23,559 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 23:18:23,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:18:23,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:18:23,586 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:18:23,586 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:18:23,586 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:18:23,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:18:23,587 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:18:23,587 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:18:23,587 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:18:23,587 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:18:23,587 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:18:23,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:18:23,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:18:23,587 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:18:23,587 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:18:23,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:18:23,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:18:23,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:18:23,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:18:23,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:18:23,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:18:23,673 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:18:23,674 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:18:26,599 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:18:26,614 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:18:26,614 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:18:26,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:18:26 BoogieIcfgContainer [2023-04-01 23:18:26,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:18:26,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:18:26,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:18:26,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:18:26,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:18:22" (1/3) ... [2023-04-01 23:18:26,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64770cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:18:26, skipping insertion in model container [2023-04-01 23:18:26,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:18:23" (2/3) ... [2023-04-01 23:18:26,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64770cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:18:26, skipping insertion in model container [2023-04-01 23:18:26,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:18:26" (3/3) ... [2023-04-01 23:18:26,626 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label00.c [2023-04-01 23:18:26,640 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:18:26,640 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:18:26,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:18:26,713 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;@6e4643e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:18:26,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:18:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 603 states, 593 states have (on average 1.7993254637436762) internal successors, (1067), 594 states have internal predecessors, (1067), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 23:18:26,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 23:18:26,730 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:18:26,730 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] [2023-04-01 23:18:26,731 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:18:26,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:18:26,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1700373630, now seen corresponding path program 1 times [2023-04-01 23:18:26,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:18:26,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744531809] [2023-04-01 23:18:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:26,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:18:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:27,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:18:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:27,352 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 23:18:27,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:18:27,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744531809] [2023-04-01 23:18:27,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744531809] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:18:27,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:18:27,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 23:18:27,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736102797] [2023-04-01 23:18:27,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:18:27,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 23:18:27,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:18:27,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 23:18:27,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 23:18:27,394 INFO L87 Difference]: Start difference. First operand has 603 states, 593 states have (on average 1.7993254637436762) internal successors, (1067), 594 states have internal predecessors, (1067), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 23:18:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:18:31,187 INFO L93 Difference]: Finished difference Result 1690 states and 3086 transitions. [2023-04-01 23:18:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:18:31,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 60 [2023-04-01 23:18:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:18:31,205 INFO L225 Difference]: With dead ends: 1690 [2023-04-01 23:18:31,205 INFO L226 Difference]: Without dead ends: 1010 [2023-04-01 23:18:31,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:18:31,219 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 1446 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1446 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 2742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:18:31,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1446 Valid, 131 Invalid, 2742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 2361 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 23:18:31,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2023-04-01 23:18:31,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 1003. [2023-04-01 23:18:31,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 987 states have (on average 1.4994934143870313) internal successors, (1480), 989 states have internal predecessors, (1480), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-01 23:18:31,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1499 transitions. [2023-04-01 23:18:31,332 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1499 transitions. Word has length 60 [2023-04-01 23:18:31,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:18:31,334 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 1499 transitions. [2023-04-01 23:18:31,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 23:18:31,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1499 transitions. [2023-04-01 23:18:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-01 23:18:31,342 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:18:31,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:18:31,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:18:31,342 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:18:31,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:18:31,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1052255798, now seen corresponding path program 1 times [2023-04-01 23:18:31,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:18:31,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090073321] [2023-04-01 23:18:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:31,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:18:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:31,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:18:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:31,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:18:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:18:32,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:18:32,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090073321] [2023-04-01 23:18:32,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090073321] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:18:32,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306480575] [2023-04-01 23:18:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:32,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:18:32,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:18:32,061 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:18:32,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 23:18:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:32,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 23:18:32,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:18:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:18:34,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:18:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:18:35,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306480575] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 23:18:35,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:18:35,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2023-04-01 23:18:35,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733472079] [2023-04-01 23:18:35,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:18:35,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 23:18:35,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:18:35,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 23:18:35,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:18:35,289 INFO L87 Difference]: Start difference. First operand 1003 states and 1499 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:18:40,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:18:40,091 INFO L93 Difference]: Finished difference Result 3837 states and 5807 transitions. [2023-04-01 23:18:40,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 23:18:40,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 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 134 [2023-04-01 23:18:40,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:18:40,104 INFO L225 Difference]: With dead ends: 3837 [2023-04-01 23:18:40,104 INFO L226 Difference]: Without dead ends: 2840 [2023-04-01 23:18:40,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:18:40,107 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 1440 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3382 mSolverCounterSat, 1356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1440 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 4738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1356 IncrementalHoareTripleChecker+Valid, 3382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:18:40,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1440 Valid, 279 Invalid, 4738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1356 Valid, 3382 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-04-01 23:18:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2023-04-01 23:18:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2804. [2023-04-01 23:18:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2760 states have (on average 1.421376811594203) internal successors, (3923), 2769 states have internal predecessors, (3923), 14 states have call successors, (14), 14 states have call predecessors, (14), 29 states have return successors, (84), 20 states have call predecessors, (84), 13 states have call successors, (84) [2023-04-01 23:18:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 4021 transitions. [2023-04-01 23:18:40,180 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 4021 transitions. Word has length 134 [2023-04-01 23:18:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:18:40,180 INFO L495 AbstractCegarLoop]: Abstraction has 2804 states and 4021 transitions. [2023-04-01 23:18:40,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:18:40,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 4021 transitions. [2023-04-01 23:18:40,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-04-01 23:18:40,183 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:18:40,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:18:40,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 23:18:40,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:18:40,389 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:18:40,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:18:40,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1218378727, now seen corresponding path program 1 times [2023-04-01 23:18:40,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:18:40,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096678045] [2023-04-01 23:18:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:40,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:18:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:40,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:18:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:40,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:18:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:18:40,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:18:40,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096678045] [2023-04-01 23:18:40,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096678045] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:18:40,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074764100] [2023-04-01 23:18:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:40,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:18:40,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:18:40,706 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:18:40,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 23:18:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:40,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:18:40,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:18:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:18:40,893 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:18:40,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074764100] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:18:40,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:18:40,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:18:40,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509505222] [2023-04-01 23:18:40,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:18:40,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:18:40,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:18:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:18:40,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:18:40,895 INFO L87 Difference]: Start difference. First operand 2804 states and 4021 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 23:18:42,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:18:42,976 INFO L93 Difference]: Finished difference Result 8237 states and 11963 transitions. [2023-04-01 23:18:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:18:42,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 169 [2023-04-01 23:18:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:18:43,005 INFO L225 Difference]: With dead ends: 8237 [2023-04-01 23:18:43,005 INFO L226 Difference]: Without dead ends: 5439 [2023-04-01 23:18:43,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:18:43,013 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 504 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:18:43,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 851 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 23:18:43,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5439 states. [2023-04-01 23:18:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5439 to 5004. [2023-04-01 23:18:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5004 states, 4927 states have (on average 1.4442865841282728) internal successors, (7116), 4943 states have internal predecessors, (7116), 24 states have call successors, (24), 24 states have call predecessors, (24), 52 states have return successors, (249), 36 states have call predecessors, (249), 23 states have call successors, (249) [2023-04-01 23:18:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5004 states to 5004 states and 7389 transitions. [2023-04-01 23:18:43,146 INFO L78 Accepts]: Start accepts. Automaton has 5004 states and 7389 transitions. Word has length 169 [2023-04-01 23:18:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:18:43,147 INFO L495 AbstractCegarLoop]: Abstraction has 5004 states and 7389 transitions. [2023-04-01 23:18:43,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 23:18:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 5004 states and 7389 transitions. [2023-04-01 23:18:43,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-04-01 23:18:43,152 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:18:43,152 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:18:43,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 23:18:43,358 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,SelfDestructingSolverStorable2 [2023-04-01 23:18:43,358 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:18:43,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:18:43,361 INFO L85 PathProgramCache]: Analyzing trace with hash -710902207, now seen corresponding path program 1 times [2023-04-01 23:18:43,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:18:43,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282531785] [2023-04-01 23:18:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:43,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:18:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:43,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:18:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:43,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:18:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:18:43,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:18:43,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282531785] [2023-04-01 23:18:43,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282531785] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:18:43,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:18:43,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:18:43,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906086718] [2023-04-01 23:18:43,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:18:43,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:18:43,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:18:43,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:18:43,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:18:43,904 INFO L87 Difference]: Start difference. First operand 5004 states and 7389 transitions. Second operand has 7 states, 6 states have (on average 31.833333333333332) internal successors, (191), 4 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:18:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:18:47,973 INFO L93 Difference]: Finished difference Result 14180 states and 21724 transitions. [2023-04-01 23:18:47,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:18:47,974 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 31.833333333333332) internal successors, (191), 4 states have internal predecessors, (191), 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 197 [2023-04-01 23:18:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:18:48,010 INFO L225 Difference]: With dead ends: 14180 [2023-04-01 23:18:48,011 INFO L226 Difference]: Without dead ends: 9182 [2023-04-01 23:18:48,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:18:48,023 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 2580 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 3312 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2580 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 3872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 3312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:18:48,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2580 Valid, 365 Invalid, 3872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 3312 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 23:18:48,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9182 states. [2023-04-01 23:18:48,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9182 to 7814. [2023-04-01 23:18:48,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7814 states, 7640 states have (on average 1.338350785340314) internal successors, (10225), 7697 states have internal predecessors, (10225), 36 states have call successors, (36), 36 states have call predecessors, (36), 137 states have return successors, (700), 80 states have call predecessors, (700), 35 states have call successors, (700) [2023-04-01 23:18:48,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7814 states to 7814 states and 10961 transitions. [2023-04-01 23:18:48,242 INFO L78 Accepts]: Start accepts. Automaton has 7814 states and 10961 transitions. Word has length 197 [2023-04-01 23:18:48,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:18:48,242 INFO L495 AbstractCegarLoop]: Abstraction has 7814 states and 10961 transitions. [2023-04-01 23:18:48,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 31.833333333333332) internal successors, (191), 4 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:18:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 7814 states and 10961 transitions. [2023-04-01 23:18:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-04-01 23:18:48,250 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:18:48,251 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 23:18:48,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 23:18:48,251 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:18:48,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:18:48,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2060294586, now seen corresponding path program 1 times [2023-04-01 23:18:48,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:18:48,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742772459] [2023-04-01 23:18:48,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:48,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:18:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:48,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:18:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:48,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:18:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:48,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-04-01 23:18:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 174 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 23:18:48,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:18:48,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742772459] [2023-04-01 23:18:48,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742772459] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:18:48,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776953223] [2023-04-01 23:18:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:48,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:18:48,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:18:48,609 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:18:48,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 23:18:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:48,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:18:48,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:18:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:18:48,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:18:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:18:49,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776953223] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:18:49,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:18:49,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:18:49,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794773680] [2023-04-01 23:18:49,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:18:49,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:18:49,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:18:49,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:18:49,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:18:49,125 INFO L87 Difference]: Start difference. First operand 7814 states and 10961 transitions. Second operand has 11 states, 11 states have (on average 31.727272727272727) internal successors, (349), 9 states have internal predecessors, (349), 4 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:18:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:18:52,826 INFO L93 Difference]: Finished difference Result 17185 states and 24198 transitions. [2023-04-01 23:18:52,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 23:18:52,827 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 31.727272727272727) internal successors, (349), 9 states have internal predecessors, (349), 4 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 209 [2023-04-01 23:18:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:18:52,852 INFO L225 Difference]: With dead ends: 17185 [2023-04-01 23:18:52,852 INFO L226 Difference]: Without dead ends: 8013 [2023-04-01 23:18:52,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 420 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2023-04-01 23:18:52,870 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 3112 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 3450 mSolverCounterSat, 1382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3112 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 4832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1382 IncrementalHoareTripleChecker+Valid, 3450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:18:52,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3112 Valid, 371 Invalid, 4832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1382 Valid, 3450 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 23:18:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8013 states. [2023-04-01 23:18:52,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8013 to 6560. [2023-04-01 23:18:53,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6560 states, 6375 states have (on average 1.179450980392157) internal successors, (7519), 6447 states have internal predecessors, (7519), 30 states have call successors, (30), 30 states have call predecessors, (30), 154 states have return successors, (477), 82 states have call predecessors, (477), 29 states have call successors, (477) [2023-04-01 23:18:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6560 states to 6560 states and 8026 transitions. [2023-04-01 23:18:53,016 INFO L78 Accepts]: Start accepts. Automaton has 6560 states and 8026 transitions. Word has length 209 [2023-04-01 23:18:53,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:18:53,017 INFO L495 AbstractCegarLoop]: Abstraction has 6560 states and 8026 transitions. [2023-04-01 23:18:53,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.727272727272727) internal successors, (349), 9 states have internal predecessors, (349), 4 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:18:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 6560 states and 8026 transitions. [2023-04-01 23:18:53,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-04-01 23:18:53,020 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:18:53,020 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 23:18:53,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 23:18:53,226 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 23:18:53,226 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:18:53,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:18:53,226 INFO L85 PathProgramCache]: Analyzing trace with hash 96702614, now seen corresponding path program 1 times [2023-04-01 23:18:53,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:18:53,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42994730] [2023-04-01 23:18:53,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:53,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:18:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:53,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:18:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:53,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:18:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:53,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:18:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 107 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 23:18:53,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:18:53,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42994730] [2023-04-01 23:18:53,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42994730] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:18:53,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75323484] [2023-04-01 23:18:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:53,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:18:53,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:18:53,530 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:18:53,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 23:18:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:53,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:18:53,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:18:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 23:18:53,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:18:53,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75323484] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:18:53,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:18:53,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:18:53,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566174072] [2023-04-01 23:18:53,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:18:53,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:18:53,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:18:53,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:18:53,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:18:53,728 INFO L87 Difference]: Start difference. First operand 6560 states and 8026 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:18:55,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:18:55,443 INFO L93 Difference]: Finished difference Result 16619 states and 20836 transitions. [2023-04-01 23:18:55,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:18:55,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 222 [2023-04-01 23:18:55,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:18:55,469 INFO L225 Difference]: With dead ends: 16619 [2023-04-01 23:18:55,469 INFO L226 Difference]: Without dead ends: 10065 [2023-04-01 23:18:55,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:18:55,483 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 408 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:18:55,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 475 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 23:18:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10065 states. [2023-04-01 23:18:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10065 to 7885. [2023-04-01 23:18:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7885 states, 7672 states have (on average 1.1680135557872784) internal successors, (8961), 7754 states have internal predecessors, (8961), 36 states have call successors, (36), 36 states have call predecessors, (36), 176 states have return successors, (633), 94 states have call predecessors, (633), 35 states have call successors, (633) [2023-04-01 23:18:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7885 states to 7885 states and 9630 transitions. [2023-04-01 23:18:55,660 INFO L78 Accepts]: Start accepts. Automaton has 7885 states and 9630 transitions. Word has length 222 [2023-04-01 23:18:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:18:55,660 INFO L495 AbstractCegarLoop]: Abstraction has 7885 states and 9630 transitions. [2023-04-01 23:18:55,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:18:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 7885 states and 9630 transitions. [2023-04-01 23:18:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-04-01 23:18:55,667 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:18:55,668 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:18:55,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 23:18:55,881 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 23:18:55,881 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:18:55,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:18:55,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1709986173, now seen corresponding path program 1 times [2023-04-01 23:18:55,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:18:55,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264028333] [2023-04-01 23:18:55,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:55,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:18:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:56,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:18:56,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:56,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:18:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:56,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:18:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 107 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:18:56,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:18:56,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264028333] [2023-04-01 23:18:56,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264028333] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:18:56,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608293265] [2023-04-01 23:18:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:56,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:18:56,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:18:56,172 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:18:56,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 23:18:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:56,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:18:56,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:18:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:18:56,339 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:18:56,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608293265] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:18:56,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:18:56,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:18:56,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693583855] [2023-04-01 23:18:56,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:18:56,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:18:56,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:18:56,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:18:56,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:18:56,341 INFO L87 Difference]: Start difference. First operand 7885 states and 9630 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:18:58,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:18:58,096 INFO L93 Difference]: Finished difference Result 19323 states and 24226 transitions. [2023-04-01 23:18:58,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:18:58,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 235 [2023-04-01 23:18:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:18:58,129 INFO L225 Difference]: With dead ends: 19323 [2023-04-01 23:18:58,129 INFO L226 Difference]: Without dead ends: 11444 [2023-04-01 23:18:58,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:18:58,146 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 450 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:18:58,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 397 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 23:18:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11444 states. [2023-04-01 23:18:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11444 to 9687. [2023-04-01 23:18:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9687 states, 9428 states have (on average 1.1773440814594824) internal successors, (11100), 9530 states have internal predecessors, (11100), 44 states have call successors, (44), 44 states have call predecessors, (44), 214 states have return successors, (1003), 112 states have call predecessors, (1003), 43 states have call successors, (1003) [2023-04-01 23:18:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9687 states to 9687 states and 12147 transitions. [2023-04-01 23:18:58,406 INFO L78 Accepts]: Start accepts. Automaton has 9687 states and 12147 transitions. Word has length 235 [2023-04-01 23:18:58,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:18:58,407 INFO L495 AbstractCegarLoop]: Abstraction has 9687 states and 12147 transitions. [2023-04-01 23:18:58,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:18:58,407 INFO L276 IsEmpty]: Start isEmpty. Operand 9687 states and 12147 transitions. [2023-04-01 23:18:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-04-01 23:18:58,410 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:18:58,411 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:18:58,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 23:18:58,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:18:58,617 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:18:58,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:18:58,617 INFO L85 PathProgramCache]: Analyzing trace with hash -71382898, now seen corresponding path program 1 times [2023-04-01 23:18:58,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:18:58,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631349149] [2023-04-01 23:18:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:58,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:18:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:58,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:18:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:58,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:18:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:58,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:18:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 23:18:58,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:18:58,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631349149] [2023-04-01 23:18:58,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631349149] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:18:58,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117000679] [2023-04-01 23:18:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:18:58,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:18:58,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:18:58,938 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:18:58,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 23:18:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:18:59,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:18:59,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:18:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 191 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:18:59,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:18:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 191 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:18:59,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117000679] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:18:59,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:18:59,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:18:59,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310726426] [2023-04-01 23:18:59,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:18:59,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:18:59,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:18:59,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:18:59,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:18:59,499 INFO L87 Difference]: Start difference. First operand 9687 states and 12147 transitions. Second operand has 11 states, 11 states have (on average 38.18181818181818) internal successors, (420), 9 states have internal predecessors, (420), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 23:19:03,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:19:03,602 INFO L93 Difference]: Finished difference Result 25166 states and 32844 transitions. [2023-04-01 23:19:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 23:19:03,605 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 38.18181818181818) internal successors, (420), 9 states have internal predecessors, (420), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 242 [2023-04-01 23:19:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:19:03,639 INFO L225 Difference]: With dead ends: 25166 [2023-04-01 23:19:03,640 INFO L226 Difference]: Without dead ends: 15485 [2023-04-01 23:19:03,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 486 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-04-01 23:19:03,657 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 3181 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 4974 mSolverCounterSat, 993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3181 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 5967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 993 IncrementalHoareTripleChecker+Valid, 4974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:19:03,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3181 Valid, 330 Invalid, 5967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [993 Valid, 4974 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 23:19:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15485 states. [2023-04-01 23:19:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15485 to 15460. [2023-04-01 23:19:03,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15460 states, 15087 states have (on average 1.1560946510240604) internal successors, (17442), 15226 states have internal predecessors, (17442), 70 states have call successors, (70), 70 states have call predecessors, (70), 302 states have return successors, (1828), 163 states have call predecessors, (1828), 69 states have call successors, (1828) [2023-04-01 23:19:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15460 states to 15460 states and 19340 transitions. [2023-04-01 23:19:03,914 INFO L78 Accepts]: Start accepts. Automaton has 15460 states and 19340 transitions. Word has length 242 [2023-04-01 23:19:03,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:19:03,914 INFO L495 AbstractCegarLoop]: Abstraction has 15460 states and 19340 transitions. [2023-04-01 23:19:03,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 38.18181818181818) internal successors, (420), 9 states have internal predecessors, (420), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 23:19:03,915 INFO L276 IsEmpty]: Start isEmpty. Operand 15460 states and 19340 transitions. [2023-04-01 23:19:03,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-04-01 23:19:03,919 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:19:03,919 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:19:03,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 23:19:04,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:19:04,125 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:19:04,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:19:04,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1089116523, now seen corresponding path program 1 times [2023-04-01 23:19:04,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:19:04,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974207503] [2023-04-01 23:19:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:19:04,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:19:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:04,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:19:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:04,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:19:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:04,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:19:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 107 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:19:04,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:19:04,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974207503] [2023-04-01 23:19:04,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974207503] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:19:04,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182760867] [2023-04-01 23:19:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:19:04,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:19:04,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:19:04,430 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:19:04,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 23:19:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:04,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:19:04,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:19:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:19:04,611 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:19:04,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182760867] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:19:04,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:19:04,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:19:04,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147574641] [2023-04-01 23:19:04,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:19:04,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:19:04,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:19:04,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:19:04,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:19:04,615 INFO L87 Difference]: Start difference. First operand 15460 states and 19340 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:19:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:19:06,540 INFO L93 Difference]: Finished difference Result 41006 states and 52533 transitions. [2023-04-01 23:19:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:19:06,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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 267 [2023-04-01 23:19:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:19:06,624 INFO L225 Difference]: With dead ends: 41006 [2023-04-01 23:19:06,624 INFO L226 Difference]: Without dead ends: 25552 [2023-04-01 23:19:06,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 272 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:19:06,655 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 489 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:19:06,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 299 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 23:19:06,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25552 states. [2023-04-01 23:19:07,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25552 to 23779. [2023-04-01 23:19:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23779 states, 23288 states have (on average 1.1588371693576092) internal successors, (26987), 23459 states have internal predecessors, (26987), 108 states have call successors, (108), 108 states have call predecessors, (108), 382 states have return successors, (3338), 211 states have call predecessors, (3338), 107 states have call successors, (3338) [2023-04-01 23:19:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23779 states to 23779 states and 30433 transitions. [2023-04-01 23:19:07,149 INFO L78 Accepts]: Start accepts. Automaton has 23779 states and 30433 transitions. Word has length 267 [2023-04-01 23:19:07,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:19:07,150 INFO L495 AbstractCegarLoop]: Abstraction has 23779 states and 30433 transitions. [2023-04-01 23:19:07,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:19:07,150 INFO L276 IsEmpty]: Start isEmpty. Operand 23779 states and 30433 transitions. [2023-04-01 23:19:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2023-04-01 23:19:07,154 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:19:07,155 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:19:07,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 23:19:07,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:19:07,364 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:19:07,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:19:07,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1674656965, now seen corresponding path program 1 times [2023-04-01 23:19:07,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:19:07,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772614605] [2023-04-01 23:19:07,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:19:07,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:19:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:07,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:19:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:07,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:19:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:07,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:19:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 107 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:19:07,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:19:07,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772614605] [2023-04-01 23:19:07,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772614605] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:19:07,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164870949] [2023-04-01 23:19:07,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:19:07,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:19:07,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:19:07,881 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:19:07,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 23:19:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:19:08,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 23:19:08,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:19:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-01 23:19:08,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:19:08,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164870949] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:19:08,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:19:08,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2023-04-01 23:19:08,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74269972] [2023-04-01 23:19:08,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 23:19:08,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 23:19:08,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:19:08,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 23:19:08,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:19:08,871 INFO L87 Difference]: Start difference. First operand 23779 states and 30433 transitions. Second operand has 10 states, 10 states have (on average 38.9) internal successors, (389), 8 states have internal predecessors, (389), 5 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:19:17,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:19,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:23,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:26,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:28,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:30,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:32,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:34,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:37,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:40,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:41,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:43,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:45,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:48,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:50,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:52,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:54,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:56,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:19:58,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:00,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:03,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:05,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:07,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:08,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:10,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:12,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:14,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:17,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:19,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:23,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:25,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:28,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:31,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:33,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:35,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:37,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:39,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:41,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:43,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:45,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:47,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:50,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:52,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:54,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:56,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:20:58,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:21:00,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:21:02,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:21:04,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:21:07,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:21:10,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:21:12,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:21:14,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:21:16,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:21:18,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:21:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:21:18,115 INFO L93 Difference]: Finished difference Result 73602 states and 102139 transitions. [2023-04-01 23:21:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 23:21:18,115 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 38.9) internal successors, (389), 8 states have internal predecessors, (389), 5 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 284 [2023-04-01 23:21:18,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:21:18,287 INFO L225 Difference]: With dead ends: 73602 [2023-04-01 23:21:18,287 INFO L226 Difference]: Without dead ends: 49372 [2023-04-01 23:21:18,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 490 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=241, Invalid=750, Unknown=1, NotChecked=0, Total=992 [2023-04-01 23:21:18,333 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 8835 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 5690 mSolverCounterSat, 1737 mSolverCounterUnsat, 52 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8842 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 7479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1737 IncrementalHoareTripleChecker+Valid, 5690 IncrementalHoareTripleChecker+Invalid, 52 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 124.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:21:18,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8842 Valid, 460 Invalid, 7479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1737 Valid, 5690 Invalid, 52 Unknown, 0 Unchecked, 124.3s Time] [2023-04-01 23:21:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49372 states. [2023-04-01 23:21:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49372 to 46030. [2023-04-01 23:21:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46030 states, 45108 states have (on average 1.1494635097987054) internal successors, (51850), 45434 states have internal predecessors, (51850), 208 states have call successors, (208), 208 states have call predecessors, (208), 713 states have return successors, (7814), 387 states have call predecessors, (7814), 207 states have call successors, (7814) [2023-04-01 23:21:19,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46030 states to 46030 states and 59872 transitions. [2023-04-01 23:21:19,288 INFO L78 Accepts]: Start accepts. Automaton has 46030 states and 59872 transitions. Word has length 284 [2023-04-01 23:21:19,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:21:19,288 INFO L495 AbstractCegarLoop]: Abstraction has 46030 states and 59872 transitions. [2023-04-01 23:21:19,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 38.9) internal successors, (389), 8 states have internal predecessors, (389), 5 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:21:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 46030 states and 59872 transitions. [2023-04-01 23:21:19,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2023-04-01 23:21:19,300 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:21:19,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:21:19,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 23:21:19,507 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,SelfDestructingSolverStorable9 [2023-04-01 23:21:19,508 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:21:19,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:21:19,509 INFO L85 PathProgramCache]: Analyzing trace with hash 101547351, now seen corresponding path program 1 times [2023-04-01 23:21:19,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:21:19,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662082640] [2023-04-01 23:21:19,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:21:19,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:21:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:20,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:21:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:20,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:21:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:20,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:21:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:21:21,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:21:21,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662082640] [2023-04-01 23:21:21,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662082640] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:21:21,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230238996] [2023-04-01 23:21:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:21:21,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:21:21,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:21:21,034 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:21:21,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 23:21:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:21,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:21:21,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:21:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:21:21,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:21:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:21:22,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230238996] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 23:21:22,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:21:22,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-04-01 23:21:22,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144985379] [2023-04-01 23:21:22,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:21:22,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 23:21:22,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:21:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 23:21:22,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:21:22,758 INFO L87 Difference]: Start difference. First operand 46030 states and 59872 transitions. Second operand has 6 states, 6 states have (on average 66.5) internal successors, (399), 5 states have internal predecessors, (399), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:21:27,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:21:27,038 INFO L93 Difference]: Finished difference Result 97781 states and 126885 transitions. [2023-04-01 23:21:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 23:21:27,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 66.5) internal successors, (399), 5 states have internal predecessors, (399), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 407 [2023-04-01 23:21:27,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:21:27,251 INFO L225 Difference]: With dead ends: 97781 [2023-04-01 23:21:27,251 INFO L226 Difference]: Without dead ends: 49541 [2023-04-01 23:21:27,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 814 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:21:27,478 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 1091 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 3384 mSolverCounterSat, 827 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 4211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 827 IncrementalHoareTripleChecker+Valid, 3384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:21:27,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 261 Invalid, 4211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [827 Valid, 3384 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 23:21:27,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49541 states. [2023-04-01 23:21:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49541 to 45998. [2023-04-01 23:21:28,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45998 states, 45089 states have (on average 1.1472421211381933) internal successors, (51728), 45408 states have internal predecessors, (51728), 208 states have call successors, (208), 208 states have call predecessors, (208), 700 states have return successors, (7737), 381 states have call predecessors, (7737), 207 states have call successors, (7737) [2023-04-01 23:21:28,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45998 states to 45998 states and 59673 transitions. [2023-04-01 23:21:28,255 INFO L78 Accepts]: Start accepts. Automaton has 45998 states and 59673 transitions. Word has length 407 [2023-04-01 23:21:28,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:21:28,256 INFO L495 AbstractCegarLoop]: Abstraction has 45998 states and 59673 transitions. [2023-04-01 23:21:28,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.5) internal successors, (399), 5 states have internal predecessors, (399), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:21:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 45998 states and 59673 transitions. [2023-04-01 23:21:28,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-04-01 23:21:28,265 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:21:28,266 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:21:28,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 23:21:28,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:21:28,472 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:21:28,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:21:28,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1880207421, now seen corresponding path program 1 times [2023-04-01 23:21:28,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:21:28,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343159071] [2023-04-01 23:21:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:21:28,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:21:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:29,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:21:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:29,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:21:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:29,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:21:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:29,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:21:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 23:21:29,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:21:29,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343159071] [2023-04-01 23:21:29,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343159071] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:21:29,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476367245] [2023-04-01 23:21:29,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:21:29,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:21:29,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:21:29,867 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:21:29,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 23:21:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:21:30,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 23:21:30,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:21:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-01 23:21:30,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:21:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:21:36,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476367245] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:21:36,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:21:36,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 20 [2023-04-01 23:21:36,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673805117] [2023-04-01 23:21:36,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:21:36,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 23:21:36,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:21:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 23:21:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-04-01 23:21:36,489 INFO L87 Difference]: Start difference. First operand 45998 states and 59673 transitions. Second operand has 20 states, 20 states have (on average 61.6) internal successors, (1232), 18 states have internal predecessors, (1232), 12 states have call successors, (17), 11 states have call predecessors, (17), 9 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2023-04-01 23:22:01,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []