/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:26:05,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:26:05,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:26:05,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 20:26:05,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 20:26:05,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 20:26:05,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 20:26:05,481 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 20:26:05,503 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:26:05,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:26:05,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:26:05,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:26:05,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:26:05,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:26:05,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:26:05,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:26:05,505 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:26:05,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:26:05,506 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:26:05,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:26:05,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:26:05,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:26:05,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:26:05,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:26:05,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:26:05,506 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:26:05,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:26:05,506 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:26:05,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:26:05,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:26:05,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:26:05,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:26:05,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:26:05,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:26:05,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:26:05,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:26:05,508 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:26:05,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:26:05,508 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:26:05,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:26:05,508 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:26:05,508 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:26:05,508 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:26:05,508 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:26:05,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:26:05,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:26:05,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:26:05,715 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:26:05,715 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:26:05,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label21.c [2023-04-01 20:26:06,749 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:26:07,003 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:26:07,003 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label21.c [2023-04-01 20:26:07,019 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/769dcb4e8/510c246b61cc47fb939c547eaf0c72ce/FLAGa47b0e3ee [2023-04-01 20:26:07,033 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/769dcb4e8/510c246b61cc47fb939c547eaf0c72ce [2023-04-01 20:26:07,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:26:07,037 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:26:07,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:26:07,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:26:07,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:26:07,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:26:07" (1/1) ... [2023-04-01 20:26:07,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56e3528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:07, skipping insertion in model container [2023-04-01 20:26:07,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:26:07" (1/1) ... [2023-04-01 20:26:07,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:26:07,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:26:07,548 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label21.c[61500,61513] [2023-04-01 20:26:07,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:26:07,596 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:26:07,770 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label21.c[61500,61513] [2023-04-01 20:26:07,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:26:07,806 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:26:07,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:07 WrapperNode [2023-04-01 20:26:07,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:26:07,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:26:07,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:26:07,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:26:07,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:07" (1/1) ... [2023-04-01 20:26:07,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:07" (1/1) ... [2023-04-01 20:26:07,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:07" (1/1) ... [2023-04-01 20:26:07,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:07" (1/1) ... [2023-04-01 20:26:07,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:07" (1/1) ... [2023-04-01 20:26:07,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:07" (1/1) ... [2023-04-01 20:26:07,940 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:07" (1/1) ... [2023-04-01 20:26:07,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:07" (1/1) ... [2023-04-01 20:26:07,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:26:07,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:26:07,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:26:07,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:26:07,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:07" (1/1) ... [2023-04-01 20:26:07,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:26:07,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:08,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 20:26:08,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 20:26:08,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:26:08,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:26:08,052 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:26:08,053 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 20:26:08,053 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:26:08,053 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 20:26:08,053 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:26:08,053 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:26:08,053 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:26:08,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:26:08,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:26:08,053 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 20:26:08,053 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:26:08,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:26:08,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:26:08,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:26:08,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:26:08,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:26:08,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:26:08,132 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:26:08,134 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:26:09,431 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:26:09,442 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:26:09,443 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 20:26:09,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:26:09 BoogieIcfgContainer [2023-04-01 20:26:09,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:26:09,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:26:09,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:26:09,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:26:09,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:26:07" (1/3) ... [2023-04-01 20:26:09,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1788b72a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:26:09, skipping insertion in model container [2023-04-01 20:26:09,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:26:07" (2/3) ... [2023-04-01 20:26:09,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1788b72a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:26:09, skipping insertion in model container [2023-04-01 20:26:09,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:26:09" (3/3) ... [2023-04-01 20:26:09,451 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label21.c [2023-04-01 20:26:09,466 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:26:09,466 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:26:09,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:26:09,514 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;@7424714a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:26:09,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:26:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:26:09,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-04-01 20:26:09,530 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:09,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:26:09,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:09,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:09,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1779641862, now seen corresponding path program 1 times [2023-04-01 20:26:09,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:09,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856274256] [2023-04-01 20:26:09,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:09,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:10,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:10,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:10,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856274256] [2023-04-01 20:26:10,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856274256] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:10,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:26:10,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 20:26:10,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261130230] [2023-04-01 20:26:10,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:10,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:26:10,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:10,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:26:10,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:26:10,636 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 20:26:12,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:12,205 INFO L93 Difference]: Finished difference Result 893 states and 1554 transitions. [2023-04-01 20:26:12,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:26:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 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 208 [2023-04-01 20:26:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:12,219 INFO L225 Difference]: With dead ends: 893 [2023-04-01 20:26:12,219 INFO L226 Difference]: Without dead ends: 488 [2023-04-01 20:26:12,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:26:12,228 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 615 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:12,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 61 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 20:26:12,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-04-01 20:26:12,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 470. [2023-04-01 20:26:12,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 460 states have (on average 1.617391304347826) internal successors, (744), 462 states have internal predecessors, (744), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:26:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 755 transitions. [2023-04-01 20:26:12,291 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 755 transitions. Word has length 208 [2023-04-01 20:26:12,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:12,292 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 755 transitions. [2023-04-01 20:26:12,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 20:26:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 755 transitions. [2023-04-01 20:26:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-04-01 20:26:12,297 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:12,297 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:26:12,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:26:12,297 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:12,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:12,298 INFO L85 PathProgramCache]: Analyzing trace with hash 603975142, now seen corresponding path program 1 times [2023-04-01 20:26:12,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:12,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299398765] [2023-04-01 20:26:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:12,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:12,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:12,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:12,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:12,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299398765] [2023-04-01 20:26:12,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299398765] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:12,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:26:12,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:26:12,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806518031] [2023-04-01 20:26:12,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:12,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:26:12,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:12,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:26:12,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:26:12,845 INFO L87 Difference]: Start difference. First operand 470 states and 755 transitions. Second operand has 7 states, 6 states have (on average 35.166666666666664) internal successors, (211), 4 states have internal predecessors, (211), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:26:14,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:14,402 INFO L93 Difference]: Finished difference Result 1386 states and 2267 transitions. [2023-04-01 20:26:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 20:26:14,403 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 35.166666666666664) internal successors, (211), 4 states have internal predecessors, (211), 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 217 [2023-04-01 20:26:14,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:14,407 INFO L225 Difference]: With dead ends: 1386 [2023-04-01 20:26:14,407 INFO L226 Difference]: Without dead ends: 922 [2023-04-01 20:26:14,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:26:14,409 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1165 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:14,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1165 Valid, 120 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 20:26:14,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2023-04-01 20:26:14,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 898. [2023-04-01 20:26:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 878 states have (on average 1.39749430523918) internal successors, (1227), 886 states have internal predecessors, (1227), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2023-04-01 20:26:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1261 transitions. [2023-04-01 20:26:14,462 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1261 transitions. Word has length 217 [2023-04-01 20:26:14,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:14,466 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1261 transitions. [2023-04-01 20:26:14,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 35.166666666666664) internal successors, (211), 4 states have internal predecessors, (211), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:26:14,466 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1261 transitions. [2023-04-01 20:26:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-04-01 20:26:14,469 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:14,470 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:26:14,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:26:14,470 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:14,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:14,470 INFO L85 PathProgramCache]: Analyzing trace with hash -348058983, now seen corresponding path program 1 times [2023-04-01 20:26:14,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:14,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352700868] [2023-04-01 20:26:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:14,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:14,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:14,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:14,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:14,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352700868] [2023-04-01 20:26:14,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352700868] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:14,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:26:14,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:26:14,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840030582] [2023-04-01 20:26:14,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:14,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:26:14,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:14,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:26:14,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:26:14,988 INFO L87 Difference]: Start difference. First operand 898 states and 1261 transitions. Second operand has 7 states, 6 states have (on average 35.666666666666664) internal successors, (214), 4 states have internal predecessors, (214), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:26:16,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:16,580 INFO L93 Difference]: Finished difference Result 2733 states and 3957 transitions. [2023-04-01 20:26:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:26:16,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 35.666666666666664) internal successors, (214), 4 states have internal predecessors, (214), 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 220 [2023-04-01 20:26:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:16,589 INFO L225 Difference]: With dead ends: 2733 [2023-04-01 20:26:16,590 INFO L226 Difference]: Without dead ends: 1841 [2023-04-01 20:26:16,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:26:16,597 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1207 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:16,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 129 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 1379 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 20:26:16,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2023-04-01 20:26:16,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1801. [2023-04-01 20:26:16,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1751 states have (on average 1.3700742432895487) internal successors, (2399), 1781 states have internal predecessors, (2399), 10 states have call successors, (10), 10 states have call predecessors, (10), 39 states have return successors, (112), 9 states have call predecessors, (112), 9 states have call successors, (112) [2023-04-01 20:26:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2521 transitions. [2023-04-01 20:26:16,665 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2521 transitions. Word has length 220 [2023-04-01 20:26:16,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:16,665 INFO L495 AbstractCegarLoop]: Abstraction has 1801 states and 2521 transitions. [2023-04-01 20:26:16,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 35.666666666666664) internal successors, (214), 4 states have internal predecessors, (214), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 20:26:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2521 transitions. [2023-04-01 20:26:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2023-04-01 20:26:16,671 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:16,671 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:26:16,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 20:26:16,672 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:16,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:16,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1559431250, now seen corresponding path program 1 times [2023-04-01 20:26:16,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:16,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418299480] [2023-04-01 20:26:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:16,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:17,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:17,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:17,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:26:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:26:17,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:17,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418299480] [2023-04-01 20:26:17,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418299480] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:17,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114431615] [2023-04-01 20:26:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:17,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:17,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:17,185 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:26:17,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 20:26:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:17,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:26:17,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 20:26:17,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:26:17,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114431615] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:17,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:26:17,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:26:17,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503613979] [2023-04-01 20:26:17,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:17,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:26:17,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:26:17,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:26:17,580 INFO L87 Difference]: Start difference. First operand 1801 states and 2521 transitions. Second operand has 5 states, 5 states have (on average 45.2) internal successors, (226), 4 states have internal predecessors, (226), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:26:17,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:17,899 INFO L93 Difference]: Finished difference Result 5458 states and 7882 transitions. [2023-04-01 20:26:17,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:26:17,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.2) internal successors, (226), 4 states have internal predecessors, (226), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 238 [2023-04-01 20:26:17,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:17,912 INFO L225 Difference]: With dead ends: 5458 [2023-04-01 20:26:17,912 INFO L226 Difference]: Without dead ends: 3663 [2023-04-01 20:26:17,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:26:17,916 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1075 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:17,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 931 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:26:17,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3663 states. [2023-04-01 20:26:18,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3663 to 3622. [2023-04-01 20:26:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 3508 states have (on average 1.3680159635119726) internal successors, (4799), 3586 states have internal predecessors, (4799), 18 states have call successors, (18), 18 states have call predecessors, (18), 95 states have return successors, (323), 17 states have call predecessors, (323), 17 states have call successors, (323) [2023-04-01 20:26:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 5140 transitions. [2023-04-01 20:26:18,024 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 5140 transitions. Word has length 238 [2023-04-01 20:26:18,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:18,024 INFO L495 AbstractCegarLoop]: Abstraction has 3622 states and 5140 transitions. [2023-04-01 20:26:18,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.2) internal successors, (226), 4 states have internal predecessors, (226), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:26:18,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 5140 transitions. [2023-04-01 20:26:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-04-01 20:26:18,032 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:18,032 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:26:18,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 20:26:18,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:18,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:18,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:18,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1667471105, now seen corresponding path program 1 times [2023-04-01 20:26:18,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:18,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743030645] [2023-04-01 20:26:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:18,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:18,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:18,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:18,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:26:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:26:18,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:18,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743030645] [2023-04-01 20:26:18,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743030645] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:18,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636904112] [2023-04-01 20:26:18,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:18,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:18,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:18,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:26:18,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 20:26:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:18,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:26:18,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 20:26:19,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:26:19,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636904112] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:19,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:26:19,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:26:19,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104098965] [2023-04-01 20:26:19,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:19,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:26:19,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:19,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:26:19,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:26:19,058 INFO L87 Difference]: Start difference. First operand 3622 states and 5140 transitions. Second operand has 5 states, 5 states have (on average 45.2) internal successors, (226), 4 states have internal predecessors, (226), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:26:19,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:19,359 INFO L93 Difference]: Finished difference Result 10971 states and 16107 transitions. [2023-04-01 20:26:19,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:26:19,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.2) internal successors, (226), 4 states have internal predecessors, (226), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 247 [2023-04-01 20:26:19,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:19,386 INFO L225 Difference]: With dead ends: 10971 [2023-04-01 20:26:19,386 INFO L226 Difference]: Without dead ends: 7355 [2023-04-01 20:26:19,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:26:19,395 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 1100 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:19,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1100 Valid, 946 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:26:19,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7355 states. [2023-04-01 20:26:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7355 to 7281. [2023-04-01 20:26:19,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7281 states, 7033 states have (on average 1.3637139200909996) internal successors, (9591), 7213 states have internal predecessors, (9591), 34 states have call successors, (34), 34 states have call predecessors, (34), 213 states have return successors, (805), 33 states have call predecessors, (805), 33 states have call successors, (805) [2023-04-01 20:26:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 10430 transitions. [2023-04-01 20:26:19,614 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 10430 transitions. Word has length 247 [2023-04-01 20:26:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:19,615 INFO L495 AbstractCegarLoop]: Abstraction has 7281 states and 10430 transitions. [2023-04-01 20:26:19,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.2) internal successors, (226), 4 states have internal predecessors, (226), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:26:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 10430 transitions. [2023-04-01 20:26:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-04-01 20:26:19,628 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:19,628 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:26:19,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 20:26:19,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:19,834 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:19,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:19,835 INFO L85 PathProgramCache]: Analyzing trace with hash -672283415, now seen corresponding path program 1 times [2023-04-01 20:26:19,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:19,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953211134] [2023-04-01 20:26:19,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:19,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:20,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:20,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:20,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 20:26:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:20,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 20:26:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 37 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 20:26:20,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:20,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953211134] [2023-04-01 20:26:20,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953211134] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:20,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858066662] [2023-04-01 20:26:20,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:20,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:20,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:20,439 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:26:20,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 20:26:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:20,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:26:20,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-01 20:26:20,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:26:20,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858066662] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:20,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:26:20,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2023-04-01 20:26:20,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098961590] [2023-04-01 20:26:20,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:20,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:26:20,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:20,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:26:20,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:26:20,725 INFO L87 Difference]: Start difference. First operand 7281 states and 10430 transitions. Second operand has 5 states, 5 states have (on average 44.2) internal successors, (221), 4 states have internal predecessors, (221), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:26:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:21,779 INFO L93 Difference]: Finished difference Result 21970 states and 32805 transitions. [2023-04-01 20:26:21,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 20:26:21,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.2) internal successors, (221), 4 states have internal predecessors, (221), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 254 [2023-04-01 20:26:21,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:21,842 INFO L225 Difference]: With dead ends: 21970 [2023-04-01 20:26:21,842 INFO L226 Difference]: Without dead ends: 14695 [2023-04-01 20:26:21,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:26:21,863 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 814 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:21,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 182 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 20:26:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14695 states. [2023-04-01 20:26:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14695 to 14517. [2023-04-01 20:26:22,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14517 states, 13939 states have (on average 1.3094913551904728) internal successors, (18253), 14385 states have internal predecessors, (18253), 66 states have call successors, (66), 66 states have call predecessors, (66), 511 states have return successors, (2085), 65 states have call predecessors, (2085), 65 states have call successors, (2085) [2023-04-01 20:26:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14517 states to 14517 states and 20404 transitions. [2023-04-01 20:26:22,272 INFO L78 Accepts]: Start accepts. Automaton has 14517 states and 20404 transitions. Word has length 254 [2023-04-01 20:26:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:22,273 INFO L495 AbstractCegarLoop]: Abstraction has 14517 states and 20404 transitions. [2023-04-01 20:26:22,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.2) internal successors, (221), 4 states have internal predecessors, (221), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:26:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 14517 states and 20404 transitions. [2023-04-01 20:26:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-04-01 20:26:22,302 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:22,302 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:26:22,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 20:26:22,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:22,509 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:22,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:22,509 INFO L85 PathProgramCache]: Analyzing trace with hash 908026715, now seen corresponding path program 2 times [2023-04-01 20:26:22,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:22,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893857530] [2023-04-01 20:26:22,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:22,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:23,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:23,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:23,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:26:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:23,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-04-01 20:26:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 54 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 20:26:23,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:23,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893857530] [2023-04-01 20:26:23,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893857530] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:23,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254597889] [2023-04-01 20:26:23,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 20:26:23,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:23,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:23,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:26:23,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 20:26:23,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 20:26:23,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 20:26:23,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:26:23,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 58 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 20:26:23,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:26:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 20:26:23,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254597889] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:26:23,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:26:23,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-04-01 20:26:23,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271020294] [2023-04-01 20:26:23,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:26:23,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 20:26:23,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:23,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 20:26:23,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:26:23,860 INFO L87 Difference]: Start difference. First operand 14517 states and 20404 transitions. Second operand has 13 states, 13 states have (on average 21.53846153846154) internal successors, (280), 11 states have internal predecessors, (280), 6 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 20:26:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:33,866 INFO L93 Difference]: Finished difference Result 52944 states and 91579 transitions. [2023-04-01 20:26:33,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-04-01 20:26:33,867 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.53846153846154) internal successors, (280), 11 states have internal predecessors, (280), 6 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 254 [2023-04-01 20:26:33,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:34,012 INFO L225 Difference]: With dead ends: 52944 [2023-04-01 20:26:34,012 INFO L226 Difference]: Without dead ends: 38433 [2023-04-01 20:26:34,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 595 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4364 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1721, Invalid=9621, Unknown=0, NotChecked=0, Total=11342 [2023-04-01 20:26:34,136 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 3843 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 6560 mSolverCounterSat, 1773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3855 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 8333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1773 IncrementalHoareTripleChecker+Valid, 6560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:34,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3855 Valid, 391 Invalid, 8333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1773 Valid, 6560 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-04-01 20:26:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38433 states. [2023-04-01 20:26:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38433 to 36437. [2023-04-01 20:26:35,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36437 states, 35068 states have (on average 1.2095357590966123) internal successors, (42416), 36102 states have internal predecessors, (42416), 169 states have call successors, (169), 166 states have call predecessors, (169), 1199 states have return successors, (6182), 168 states have call predecessors, (6182), 168 states have call successors, (6182) [2023-04-01 20:26:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36437 states to 36437 states and 48767 transitions. [2023-04-01 20:26:35,243 INFO L78 Accepts]: Start accepts. Automaton has 36437 states and 48767 transitions. Word has length 254 [2023-04-01 20:26:35,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:35,243 INFO L495 AbstractCegarLoop]: Abstraction has 36437 states and 48767 transitions. [2023-04-01 20:26:35,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.53846153846154) internal successors, (280), 11 states have internal predecessors, (280), 6 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 20:26:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 36437 states and 48767 transitions. [2023-04-01 20:26:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-04-01 20:26:35,299 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:35,300 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:26:35,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 20:26:35,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:35,520 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:35,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:35,520 INFO L85 PathProgramCache]: Analyzing trace with hash 594498346, now seen corresponding path program 1 times [2023-04-01 20:26:35,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:35,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871156336] [2023-04-01 20:26:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:35,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:36,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:36,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:36,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:26:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:26:36,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:36,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871156336] [2023-04-01 20:26:36,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871156336] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:36,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807043641] [2023-04-01 20:26:36,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:36,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:36,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:36,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:26:36,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 20:26:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:36,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:26:36,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:26:36,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:26:36,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807043641] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:36,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:26:36,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-04-01 20:26:36,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439543862] [2023-04-01 20:26:36,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:36,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:26:36,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:26:36,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:26:36,778 INFO L87 Difference]: Start difference. First operand 36437 states and 48767 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:26:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:38,091 INFO L93 Difference]: Finished difference Result 81364 states and 112460 transitions. [2023-04-01 20:26:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:26:38,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 254 [2023-04-01 20:26:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:38,262 INFO L225 Difference]: With dead ends: 81364 [2023-04-01 20:26:38,262 INFO L226 Difference]: Without dead ends: 50029 [2023-04-01 20:26:38,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:26:38,319 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 60 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:38,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 394 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:26:38,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50029 states. [2023-04-01 20:26:39,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50029 to 49137. [2023-04-01 20:26:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49137 states, 47524 states have (on average 1.2134710882922313) internal successors, (57669), 48682 states have internal predecessors, (57669), 229 states have call successors, (229), 226 states have call predecessors, (229), 1383 states have return successors, (8800), 228 states have call predecessors, (8800), 228 states have call successors, (8800) [2023-04-01 20:26:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49137 states to 49137 states and 66698 transitions. [2023-04-01 20:26:39,686 INFO L78 Accepts]: Start accepts. Automaton has 49137 states and 66698 transitions. Word has length 254 [2023-04-01 20:26:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:39,687 INFO L495 AbstractCegarLoop]: Abstraction has 49137 states and 66698 transitions. [2023-04-01 20:26:39,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:26:39,687 INFO L276 IsEmpty]: Start isEmpty. Operand 49137 states and 66698 transitions. [2023-04-01 20:26:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-04-01 20:26:39,777 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:39,777 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 20:26:39,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 20:26:39,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:39,986 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:39,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:39,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1722783189, now seen corresponding path program 1 times [2023-04-01 20:26:39,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:39,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375777555] [2023-04-01 20:26:39,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:39,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:40,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:40,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:40,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:26:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:26:41,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:41,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375777555] [2023-04-01 20:26:41,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375777555] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:41,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829779874] [2023-04-01 20:26:41,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:41,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:41,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:41,045 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:26:41,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 20:26:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:41,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:26:41,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:26:41,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:26:41,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829779874] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:41,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:26:41,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-01 20:26:41,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549102665] [2023-04-01 20:26:41,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:41,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:26:41,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:41,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:26:41,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:26:41,498 INFO L87 Difference]: Start difference. First operand 49137 states and 66698 transitions. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:26:43,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:43,200 INFO L93 Difference]: Finished difference Result 136466 states and 186376 transitions. [2023-04-01 20:26:43,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:26:43,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 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 306 [2023-04-01 20:26:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:43,530 INFO L225 Difference]: With dead ends: 136466 [2023-04-01 20:26:43,530 INFO L226 Difference]: Without dead ends: 87347 [2023-04-01 20:26:43,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:26:43,576 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 56 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:43,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 180 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:26:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87347 states. [2023-04-01 20:26:45,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87347 to 85595. [2023-04-01 20:26:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85595 states, 83339 states have (on average 1.1830355535823565) internal successors, (98593), 84794 states have internal predecessors, (98593), 402 states have call successors, (402), 399 states have call predecessors, (402), 1853 states have return successors, (13620), 401 states have call predecessors, (13620), 401 states have call successors, (13620) [2023-04-01 20:26:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85595 states to 85595 states and 112615 transitions. [2023-04-01 20:26:45,547 INFO L78 Accepts]: Start accepts. Automaton has 85595 states and 112615 transitions. Word has length 306 [2023-04-01 20:26:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:45,548 INFO L495 AbstractCegarLoop]: Abstraction has 85595 states and 112615 transitions. [2023-04-01 20:26:45,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:26:45,548 INFO L276 IsEmpty]: Start isEmpty. Operand 85595 states and 112615 transitions. [2023-04-01 20:26:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2023-04-01 20:26:45,640 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:45,640 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:26:45,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 20:26:45,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:45,847 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:45,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:45,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1701543373, now seen corresponding path program 1 times [2023-04-01 20:26:45,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:45,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355475470] [2023-04-01 20:26:45,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:45,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:46,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:46,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:46,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:26:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:47,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-04-01 20:26:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:47,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-04-01 20:26:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:47,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-04-01 20:26:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 108 proven. 65 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-04-01 20:26:47,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:47,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355475470] [2023-04-01 20:26:47,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355475470] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:47,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643306935] [2023-04-01 20:26:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:47,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:47,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:47,065 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:26:47,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 20:26:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:47,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 1621 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 20:26:47,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-04-01 20:26:47,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:26:47,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643306935] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:26:47,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:26:47,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2023-04-01 20:26:47,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894600343] [2023-04-01 20:26:47,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:26:47,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:26:47,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:47,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:26:47,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:26:47,437 INFO L87 Difference]: Start difference. First operand 85595 states and 112615 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 20:26:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:49,002 INFO L93 Difference]: Finished difference Result 162509 states and 214538 transitions. [2023-04-01 20:26:49,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:26:49,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 318 [2023-04-01 20:26:49,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:49,224 INFO L225 Difference]: With dead ends: 162509 [2023-04-01 20:26:49,224 INFO L226 Difference]: Without dead ends: 85583 [2023-04-01 20:26:49,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:26:49,378 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 354 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:49,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 62 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 20:26:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85583 states. [2023-04-01 20:26:50,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85583 to 85583. [2023-04-01 20:26:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85583 states, 83329 states have (on average 1.182961513998728) internal successors, (98575), 84782 states have internal predecessors, (98575), 402 states have call successors, (402), 399 states have call predecessors, (402), 1851 states have return successors, (13586), 401 states have call predecessors, (13586), 401 states have call successors, (13586) [2023-04-01 20:26:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85583 states to 85583 states and 112563 transitions. [2023-04-01 20:26:51,267 INFO L78 Accepts]: Start accepts. Automaton has 85583 states and 112563 transitions. Word has length 318 [2023-04-01 20:26:51,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:26:51,267 INFO L495 AbstractCegarLoop]: Abstraction has 85583 states and 112563 transitions. [2023-04-01 20:26:51,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 20:26:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 85583 states and 112563 transitions. [2023-04-01 20:26:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2023-04-01 20:26:51,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:26:51,362 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 20:26:51,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 20:26:51,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:51,569 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:26:51,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:26:51,569 INFO L85 PathProgramCache]: Analyzing trace with hash 602920887, now seen corresponding path program 1 times [2023-04-01 20:26:51,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:26:51,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316825880] [2023-04-01 20:26:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:51,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:26:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:52,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:26:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:52,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:26:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:52,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-04-01 20:26:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:26:52,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:26:52,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316825880] [2023-04-01 20:26:52,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316825880] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:26:52,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040296950] [2023-04-01 20:26:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:26:52,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:26:52,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:26:52,425 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:26:52,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 20:26:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:26:52,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 1148 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:26:52,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:26:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:52,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:26:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:26:52,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040296950] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:26:52,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:26:52,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2023-04-01 20:26:52,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400263106] [2023-04-01 20:26:52,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:26:52,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 20:26:52,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:26:52,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 20:26:52,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 20:26:52,961 INFO L87 Difference]: Start difference. First operand 85583 states and 112563 transitions. Second operand has 8 states, 8 states have (on average 48.125) internal successors, (385), 6 states have internal predecessors, (385), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:26:56,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:26:56,959 INFO L93 Difference]: Finished difference Result 177848 states and 246291 transitions. [2023-04-01 20:26:56,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 20:26:56,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 48.125) internal successors, (385), 6 states have internal predecessors, (385), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 318 [2023-04-01 20:26:56,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:26:57,490 INFO L225 Difference]: With dead ends: 177848 [2023-04-01 20:26:57,490 INFO L226 Difference]: Without dead ends: 92275 [2023-04-01 20:26:57,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 644 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:26:57,591 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1192 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 20:26:57,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1193 Valid, 158 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 20:26:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92275 states. [2023-04-01 20:26:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92275 to 86847. [2023-04-01 20:26:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86847 states, 84489 states have (on average 1.1494277361550025) internal successors, (97114), 86035 states have internal predecessors, (97114), 408 states have call successors, (408), 404 states have call predecessors, (408), 1949 states have return successors, (11498), 407 states have call predecessors, (11498), 407 states have call successors, (11498) [2023-04-01 20:27:00,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86847 states to 86847 states and 109020 transitions. [2023-04-01 20:27:00,147 INFO L78 Accepts]: Start accepts. Automaton has 86847 states and 109020 transitions. Word has length 318 [2023-04-01 20:27:00,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:00,147 INFO L495 AbstractCegarLoop]: Abstraction has 86847 states and 109020 transitions. [2023-04-01 20:27:00,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 48.125) internal successors, (385), 6 states have internal predecessors, (385), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:27:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 86847 states and 109020 transitions. [2023-04-01 20:27:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-04-01 20:27:00,278 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:00,278 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:27:00,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 20:27:00,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 20:27:00,485 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:00,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:00,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1477616130, now seen corresponding path program 1 times [2023-04-01 20:27:00,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:00,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92658109] [2023-04-01 20:27:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:00,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:01,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:01,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:01,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:27:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:01,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-04-01 20:27:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:01,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-04-01 20:27:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 117 proven. 72 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-04-01 20:27:01,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:01,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92658109] [2023-04-01 20:27:01,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92658109] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:01,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665286359] [2023-04-01 20:27:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:01,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:01,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:01,477 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:27:01,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 20:27:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:01,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 1483 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:27:01,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-04-01 20:27:01,925 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:27:01,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665286359] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:01,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:27:01,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2023-04-01 20:27:01,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835989785] [2023-04-01 20:27:01,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:01,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:27:01,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:01,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:27:01,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:27:01,926 INFO L87 Difference]: Start difference. First operand 86847 states and 109020 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:27:03,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:03,434 INFO L93 Difference]: Finished difference Result 172039 states and 215992 transitions. [2023-04-01 20:27:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:27:03,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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 324 [2023-04-01 20:27:03,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:03,785 INFO L225 Difference]: With dead ends: 172039 [2023-04-01 20:27:03,785 INFO L226 Difference]: Without dead ends: 85839 [2023-04-01 20:27:03,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:27:03,856 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 68 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:03,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 365 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:27:03,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85839 states. [2023-04-01 20:27:05,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85839 to 83292. [2023-04-01 20:27:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83292 states, 80984 states have (on average 1.1377679541637855) internal successors, (92141), 82514 states have internal predecessors, (92141), 391 states have call successors, (391), 387 states have call predecessors, (391), 1916 states have return successors, (9820), 390 states have call predecessors, (9820), 390 states have call successors, (9820) [2023-04-01 20:27:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83292 states to 83292 states and 102352 transitions. [2023-04-01 20:27:05,903 INFO L78 Accepts]: Start accepts. Automaton has 83292 states and 102352 transitions. Word has length 324 [2023-04-01 20:27:05,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:05,904 INFO L495 AbstractCegarLoop]: Abstraction has 83292 states and 102352 transitions. [2023-04-01 20:27:05,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 20:27:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 83292 states and 102352 transitions. [2023-04-01 20:27:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2023-04-01 20:27:05,997 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:05,997 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:27:06,005 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 20:27:06,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:06,203 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:06,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash -434219391, now seen corresponding path program 1 times [2023-04-01 20:27:06,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:06,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365382129] [2023-04-01 20:27:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:06,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:06,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:06,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:06,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:27:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:07,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-04-01 20:27:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 143 proven. 33 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 20:27:07,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:07,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365382129] [2023-04-01 20:27:07,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365382129] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:07,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940705214] [2023-04-01 20:27:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:07,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:07,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:07,125 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:27:07,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 20:27:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:07,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 20:27:07,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 20:27:07,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:27:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 144 proven. 34 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 20:27:07,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940705214] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:27:07,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:27:07,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2023-04-01 20:27:07,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069996074] [2023-04-01 20:27:07,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:27:07,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 20:27:07,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:07,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 20:27:07,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:27:07,727 INFO L87 Difference]: Start difference. First operand 83292 states and 102352 transitions. Second operand has 11 states, 11 states have (on average 36.0) internal successors, (396), 9 states have internal predecessors, (396), 4 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 20:27:11,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:11,882 INFO L93 Difference]: Finished difference Result 164794 states and 204390 transitions. [2023-04-01 20:27:11,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 20:27:11,882 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 36.0) internal successors, (396), 9 states have internal predecessors, (396), 4 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 340 [2023-04-01 20:27:11,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:12,064 INFO L225 Difference]: With dead ends: 164794 [2023-04-01 20:27:12,065 INFO L226 Difference]: Without dead ends: 82145 [2023-04-01 20:27:12,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2023-04-01 20:27:12,144 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1797 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 4545 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 4813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 4545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:12,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1797 Valid, 122 Invalid, 4813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 4545 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 20:27:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82145 states. [2023-04-01 20:27:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82145 to 80152. [2023-04-01 20:27:13,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80152 states, 78166 states have (on average 1.113054269119566) internal successors, (87003), 79397 states have internal predecessors, (87003), 379 states have call successors, (379), 376 states have call predecessors, (379), 1606 states have return successors, (7491), 378 states have call predecessors, (7491), 378 states have call successors, (7491) [2023-04-01 20:27:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80152 states to 80152 states and 94873 transitions. [2023-04-01 20:27:13,837 INFO L78 Accepts]: Start accepts. Automaton has 80152 states and 94873 transitions. Word has length 340 [2023-04-01 20:27:13,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:13,837 INFO L495 AbstractCegarLoop]: Abstraction has 80152 states and 94873 transitions. [2023-04-01 20:27:13,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 36.0) internal successors, (396), 9 states have internal predecessors, (396), 4 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 20:27:13,837 INFO L276 IsEmpty]: Start isEmpty. Operand 80152 states and 94873 transitions. [2023-04-01 20:27:13,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2023-04-01 20:27:13,898 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:13,898 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:27:13,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 20:27:14,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 20:27:14,105 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:14,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:14,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1239612443, now seen corresponding path program 1 times [2023-04-01 20:27:14,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:14,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967902396] [2023-04-01 20:27:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:14,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:14,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:14,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:14,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-04-01 20:27:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:14,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-04-01 20:27:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 172 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 20:27:14,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:14,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967902396] [2023-04-01 20:27:14,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967902396] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:14,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059481874] [2023-04-01 20:27:14,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:14,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:14,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:14,928 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:27:14,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 20:27:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:15,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 20:27:15,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-04-01 20:27:15,298 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:27:15,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059481874] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:27:15,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:27:15,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:27:15,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864422443] [2023-04-01 20:27:15,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:27:15,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:27:15,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:15,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:27:15,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:27:15,302 INFO L87 Difference]: Start difference. First operand 80152 states and 94873 transitions. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 4 states have internal predecessors, (237), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:27:17,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:17,536 INFO L93 Difference]: Finished difference Result 193822 states and 231764 transitions. [2023-04-01 20:27:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 20:27:17,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 4 states have internal predecessors, (237), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 356 [2023-04-01 20:27:17,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:17,839 INFO L225 Difference]: With dead ends: 193822 [2023-04-01 20:27:17,839 INFO L226 Difference]: Without dead ends: 117300 [2023-04-01 20:27:17,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:27:17,918 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 640 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:17,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 131 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:27:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117300 states. [2023-04-01 20:27:20,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117300 to 116711. [2023-04-01 20:27:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116711 states, 113845 states have (on average 1.1117045105186878) internal successors, (126562), 115615 states have internal predecessors, (126562), 549 states have call successors, (549), 547 states have call predecessors, (549), 2316 states have return successors, (11336), 548 states have call predecessors, (11336), 548 states have call successors, (11336) [2023-04-01 20:27:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116711 states to 116711 states and 138447 transitions. [2023-04-01 20:27:20,566 INFO L78 Accepts]: Start accepts. Automaton has 116711 states and 138447 transitions. Word has length 356 [2023-04-01 20:27:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:20,567 INFO L495 AbstractCegarLoop]: Abstraction has 116711 states and 138447 transitions. [2023-04-01 20:27:20,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 4 states have internal predecessors, (237), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:27:20,567 INFO L276 IsEmpty]: Start isEmpty. Operand 116711 states and 138447 transitions. [2023-04-01 20:27:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-04-01 20:27:20,672 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:20,672 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:27:20,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 20:27:20,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 20:27:20,878 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:20,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:20,879 INFO L85 PathProgramCache]: Analyzing trace with hash 51672880, now seen corresponding path program 1 times [2023-04-01 20:27:20,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:20,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836591581] [2023-04-01 20:27:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:20,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:21,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:21,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:21,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:27:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:21,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-04-01 20:27:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 170 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 20:27:21,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:21,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836591581] [2023-04-01 20:27:21,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836591581] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:21,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289387232] [2023-04-01 20:27:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:21,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:21,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:21,879 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:27:21,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 20:27:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:22,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 20:27:22,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 188 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 20:27:22,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:27:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 188 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-01 20:27:22,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289387232] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:27:22,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:27:22,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-04-01 20:27:22,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797892384] [2023-04-01 20:27:22,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:27:22,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 20:27:22,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:22,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 20:27:22,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-01 20:27:22,697 INFO L87 Difference]: Start difference. First operand 116711 states and 138447 transitions. Second operand has 13 states, 13 states have (on average 38.38461538461539) internal successors, (499), 11 states have internal predecessors, (499), 5 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 20:27:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:31,384 INFO L93 Difference]: Finished difference Result 231353 states and 294505 transitions. [2023-04-01 20:27:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-04-01 20:27:31,384 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 38.38461538461539) internal successors, (499), 11 states have internal predecessors, (499), 5 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 365 [2023-04-01 20:27:31,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:31,696 INFO L225 Difference]: With dead ends: 231353 [2023-04-01 20:27:31,696 INFO L226 Difference]: Without dead ends: 102810 [2023-04-01 20:27:31,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 786 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=703, Invalid=3989, Unknown=0, NotChecked=0, Total=4692 [2023-04-01 20:27:31,813 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 5474 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 6541 mSolverCounterSat, 1228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5480 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 7769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1228 IncrementalHoareTripleChecker+Valid, 6541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:31,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5480 Valid, 409 Invalid, 7769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1228 Valid, 6541 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 20:27:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102810 states. [2023-04-01 20:27:33,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102810 to 87176. [2023-04-01 20:27:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87176 states, 85246 states have (on average 1.054606667761537) internal successors, (89901), 86354 states have internal predecessors, (89901), 411 states have call successors, (411), 411 states have call predecessors, (411), 1518 states have return successors, (4834), 410 states have call predecessors, (4834), 410 states have call successors, (4834) [2023-04-01 20:27:33,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87176 states to 87176 states and 95146 transitions. [2023-04-01 20:27:33,817 INFO L78 Accepts]: Start accepts. Automaton has 87176 states and 95146 transitions. Word has length 365 [2023-04-01 20:27:33,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:33,818 INFO L495 AbstractCegarLoop]: Abstraction has 87176 states and 95146 transitions. [2023-04-01 20:27:33,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.38461538461539) internal successors, (499), 11 states have internal predecessors, (499), 5 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 20:27:33,818 INFO L276 IsEmpty]: Start isEmpty. Operand 87176 states and 95146 transitions. [2023-04-01 20:27:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2023-04-01 20:27:33,878 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:33,878 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:27:33,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-01 20:27:34,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 20:27:34,085 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:34,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:34,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1939166103, now seen corresponding path program 1 times [2023-04-01 20:27:34,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:34,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601944084] [2023-04-01 20:27:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:34,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:35,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:35,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:35,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2023-04-01 20:27:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:35,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2023-04-01 20:27:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 205 proven. 126 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-04-01 20:27:35,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:35,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601944084] [2023-04-01 20:27:35,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601944084] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:35,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001115667] [2023-04-01 20:27:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:35,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:35,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:35,716 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:27:35,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 20:27:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:35,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 1406 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:27:35,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 321 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-04-01 20:27:36,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:27:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 265 proven. 58 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-04-01 20:27:36,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001115667] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:27:36,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:27:36,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:27:36,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430604763] [2023-04-01 20:27:36,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:27:36,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:27:36,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:36,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:27:36,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:27:36,200 INFO L87 Difference]: Start difference. First operand 87176 states and 95146 transitions. Second operand has 12 states, 12 states have (on average 39.416666666666664) internal successors, (473), 10 states have internal predecessors, (473), 4 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 20:27:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:27:43,945 INFO L93 Difference]: Finished difference Result 330669 states and 376008 transitions. [2023-04-01 20:27:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 20:27:43,946 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 39.416666666666664) internal successors, (473), 10 states have internal predecessors, (473), 4 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 422 [2023-04-01 20:27:43,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:27:44,845 INFO L225 Difference]: With dead ends: 330669 [2023-04-01 20:27:44,845 INFO L226 Difference]: Without dead ends: 243767 [2023-04-01 20:27:44,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 864 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 20:27:44,975 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1429 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 4890 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 5062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 4890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:27:44,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1432 Valid, 244 Invalid, 5062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 4890 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 20:27:45,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243767 states. [2023-04-01 20:27:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243767 to 234954. [2023-04-01 20:27:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234954 states, 229661 states have (on average 1.0520636938792394) internal successors, (241618), 232424 states have internal predecessors, (241618), 1429 states have call successors, (1429), 1101 states have call predecessors, (1429), 3863 states have return successors, (17118), 1428 states have call predecessors, (17118), 1428 states have call successors, (17118) [2023-04-01 20:27:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234954 states to 234954 states and 260165 transitions. [2023-04-01 20:27:51,173 INFO L78 Accepts]: Start accepts. Automaton has 234954 states and 260165 transitions. Word has length 422 [2023-04-01 20:27:51,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:27:51,174 INFO L495 AbstractCegarLoop]: Abstraction has 234954 states and 260165 transitions. [2023-04-01 20:27:51,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 39.416666666666664) internal successors, (473), 10 states have internal predecessors, (473), 4 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 20:27:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 234954 states and 260165 transitions. [2023-04-01 20:27:51,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-04-01 20:27:51,469 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:27:51,469 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 20:27:51,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 20:27:51,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-01 20:27:51,677 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:27:51,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:27:51,677 INFO L85 PathProgramCache]: Analyzing trace with hash 228414748, now seen corresponding path program 1 times [2023-04-01 20:27:51,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:27:51,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407143175] [2023-04-01 20:27:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:51,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:27:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:53,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:27:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:53,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:27:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:53,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:27:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:53,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-04-01 20:27:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:53,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-04-01 20:27:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:53,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2023-04-01 20:27:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:53,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2023-04-01 20:27:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 257 proven. 148 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2023-04-01 20:27:53,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:27:53,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407143175] [2023-04-01 20:27:53,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407143175] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:27:53,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70687604] [2023-04-01 20:27:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:27:53,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:27:53,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:27:53,790 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 20:27:53,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 20:27:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:27:54,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 1895 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 20:27:54,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:27:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 406 proven. 2 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2023-04-01 20:27:54,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:27:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 307 proven. 126 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2023-04-01 20:27:54,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70687604] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:27:54,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:27:54,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2023-04-01 20:27:54,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788334225] [2023-04-01 20:27:54,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:27:54,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 20:27:54,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:27:54,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 20:27:54,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-04-01 20:27:54,749 INFO L87 Difference]: Start difference. First operand 234954 states and 260165 transitions. Second operand has 15 states, 15 states have (on average 29.666666666666668) internal successors, (445), 13 states have internal predecessors, (445), 5 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 20:28:43,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:28:43,484 INFO L93 Difference]: Finished difference Result 953588 states and 1160438 transitions. [2023-04-01 20:28:43,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2023-04-01 20:28:43,485 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 29.666666666666668) internal successors, (445), 13 states have internal predecessors, (445), 5 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 462 [2023-04-01 20:28:43,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:28:48,822 INFO L225 Difference]: With dead ends: 953588 [2023-04-01 20:28:48,822 INFO L226 Difference]: Without dead ends: 707654 [2023-04-01 20:28:49,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1239 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13541 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3368, Invalid=28138, Unknown=0, NotChecked=0, Total=31506 [2023-04-01 20:28:49,601 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 6310 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 15598 mSolverCounterSat, 1527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6312 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 17125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1527 IncrementalHoareTripleChecker+Valid, 15598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2023-04-01 20:28:49,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6312 Valid, 634 Invalid, 17125 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1527 Valid, 15598 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2023-04-01 20:28:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707654 states. [2023-04-01 20:29:11,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707654 to 662380. [2023-04-01 20:29:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662380 states, 645376 states have (on average 1.0482741843514478) internal successors, (676531), 651883 states have internal predecessors, (676531), 7450 states have call successors, (7450), 3047 states have call predecessors, (7450), 9553 states have return successors, (91193), 7449 states have call predecessors, (91193), 7449 states have call successors, (91193)