/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/Problem18_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:45:10,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:45:10,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:45:10,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:45:10,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:45:10,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:45:10,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:45:10,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:45:10,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:45:10,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:45:10,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:45:10,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:45:10,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:45:10,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:45:10,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:45:10,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:45:10,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:45:10,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:45:10,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:45:10,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:45:10,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:45:10,361 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:45:10,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:45:10,362 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:45:10,362 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:45:10,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:45:10,363 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:45:10,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:45:10,364 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:45:10,364 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:45:10,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:45:10,365 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:45:10,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:45:10,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:45:10,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:45:10,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:45:10,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:45:10,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:45:10,366 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:45:10,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:45:10,366 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:45:10,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:45:10,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:45:10,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:45:10,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:45:10,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:45:10,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:45:10,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:45:10,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:45:10,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:45:10,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:45:10,368 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:45:10,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:45:10,368 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:45:10,368 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:45:10,368 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:45:10,369 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:45:10,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:45:10,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:45:10,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:45:10,647 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:45:10,649 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:45:10,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label30.c [2023-03-30 23:45:11,901 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:45:12,287 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:45:12,288 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label30.c [2023-03-30 23:45:12,315 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0387a0ece/4133dd28d38441348751831c77d08f4b/FLAG13d03955b [2023-03-30 23:45:12,331 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0387a0ece/4133dd28d38441348751831c77d08f4b [2023-03-30 23:45:12,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:45:12,335 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:45:12,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:45:12,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:45:12,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:45:12,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:45:12" (1/1) ... [2023-03-30 23:45:12,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@280a4d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:12, skipping insertion in model container [2023-03-30 23:45:12,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:45:12" (1/1) ... [2023-03-30 23:45:12,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:45:12,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:45:12,649 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/Problem18_label30.c[4655,4668] [2023-03-30 23:45:13,257 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:45:13,269 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:45:13,294 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/Problem18_label30.c[4655,4668] [2023-03-30 23:45:13,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:45:13,563 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:45:13,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:13 WrapperNode [2023-03-30 23:45:13,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:45:13,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:45:13,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:45:13,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:45:13,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:13" (1/1) ... [2023-03-30 23:45:13,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:13" (1/1) ... [2023-03-30 23:45:13,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:13" (1/1) ... [2023-03-30 23:45:13,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:13" (1/1) ... [2023-03-30 23:45:13,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:13" (1/1) ... [2023-03-30 23:45:13,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:13" (1/1) ... [2023-03-30 23:45:13,739 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:13" (1/1) ... [2023-03-30 23:45:13,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:13" (1/1) ... [2023-03-30 23:45:13,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:45:13,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:45:13,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:45:13,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:45:13,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:13" (1/1) ... [2023-03-30 23:45:13,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:45:13,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:13,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:45:13,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:45:13,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:45:13,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:45:13,845 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:45:13,845 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:45:13,845 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:45:13,845 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:45:13,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:45:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:45:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:45:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:45:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:45:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:45:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:45:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:45:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:45:13,846 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:45:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:45:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:45:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:45:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:45:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:45:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:45:13,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:45:13,947 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:45:13,948 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:45:16,778 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:45:16,797 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:45:16,798 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:45:16,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:45:16 BoogieIcfgContainer [2023-03-30 23:45:16,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:45:16,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:45:16,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:45:16,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:45:16,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:45:12" (1/3) ... [2023-03-30 23:45:16,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f3463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:45:16, skipping insertion in model container [2023-03-30 23:45:16,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:13" (2/3) ... [2023-03-30 23:45:16,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f3463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:45:16, skipping insertion in model container [2023-03-30 23:45:16,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:45:16" (3/3) ... [2023-03-30 23:45:16,808 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label30.c [2023-03-30 23:45:16,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:45:16,823 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:45:16,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:45:16,888 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;@54a63a6d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:45:16,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:45:16,894 INFO L276 IsEmpty]: Start isEmpty. Operand has 774 states, 762 states have (on average 1.9041994750656168) internal successors, (1451), 763 states have internal predecessors, (1451), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 23:45:16,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-03-30 23:45:16,902 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:16,903 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] [2023-03-30 23:45:16,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:16,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:16,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1198999862, now seen corresponding path program 1 times [2023-03-30 23:45:16,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:16,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904087984] [2023-03-30 23:45:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:16,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:17,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:45:17,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:17,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904087984] [2023-03-30 23:45:17,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904087984] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:17,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:45:17,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:45:17,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973795507] [2023-03-30 23:45:17,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:17,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:45:17,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:17,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:45:17,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:45:17,552 INFO L87 Difference]: Start difference. First operand has 774 states, 762 states have (on average 1.9041994750656168) internal successors, (1451), 763 states have internal predecessors, (1451), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:45:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:22,142 INFO L93 Difference]: Finished difference Result 2286 states and 4364 transitions. [2023-03-30 23:45:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:45:22,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 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 49 [2023-03-30 23:45:22,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:22,162 INFO L225 Difference]: With dead ends: 2286 [2023-03-30 23:45:22,163 INFO L226 Difference]: Without dead ends: 1432 [2023-03-30 23:45:22,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:45:22,175 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2236 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3226 mSolverCounterSat, 731 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2236 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 731 IncrementalHoareTripleChecker+Valid, 3226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:22,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2236 Valid, 38 Invalid, 3957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [731 Valid, 3226 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-03-30 23:45:22,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2023-03-30 23:45:22,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1428. [2023-03-30 23:45:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1406 states have (on average 1.5896159317211949) internal successors, (2235), 1408 states have internal predecessors, (2235), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (19), 11 states have call predecessors, (19), 7 states have call successors, (19) [2023-03-30 23:45:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 2262 transitions. [2023-03-30 23:45:22,282 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 2262 transitions. Word has length 49 [2023-03-30 23:45:22,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:22,283 INFO L495 AbstractCegarLoop]: Abstraction has 1428 states and 2262 transitions. [2023-03-30 23:45:22,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:45:22,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 2262 transitions. [2023-03-30 23:45:22,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-03-30 23:45:22,292 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:22,293 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:45:22,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:45:22,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:22,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:22,295 INFO L85 PathProgramCache]: Analyzing trace with hash -144297123, now seen corresponding path program 1 times [2023-03-30 23:45:22,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:22,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926457264] [2023-03-30 23:45:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:22,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:22,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:22,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:45:22,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:22,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926457264] [2023-03-30 23:45:22,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926457264] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:22,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:45:22,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:45:22,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130142363] [2023-03-30 23:45:22,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:22,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:45:22,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:45:22,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:45:22,671 INFO L87 Difference]: Start difference. First operand 1428 states and 2262 transitions. Second operand has 8 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:45:29,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:29,512 INFO L93 Difference]: Finished difference Result 5784 states and 9263 transitions. [2023-03-30 23:45:29,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:45:29,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 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 118 [2023-03-30 23:45:29,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:29,536 INFO L225 Difference]: With dead ends: 5784 [2023-03-30 23:45:29,536 INFO L226 Difference]: Without dead ends: 4362 [2023-03-30 23:45:29,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:45:29,546 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3830 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 7436 mSolverCounterSat, 1572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3830 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 9008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1572 IncrementalHoareTripleChecker+Valid, 7436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:29,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3830 Valid, 120 Invalid, 9008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1572 Valid, 7436 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-03-30 23:45:29,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4362 states. [2023-03-30 23:45:29,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4362 to 4345. [2023-03-30 23:45:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4345 states, 4258 states have (on average 1.3586190699859089) internal successors, (5785), 4274 states have internal predecessors, (5785), 20 states have call successors, (20), 20 states have call predecessors, (20), 66 states have return successors, (175), 50 states have call predecessors, (175), 19 states have call successors, (175) [2023-03-30 23:45:29,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4345 states to 4345 states and 5980 transitions. [2023-03-30 23:45:29,681 INFO L78 Accepts]: Start accepts. Automaton has 4345 states and 5980 transitions. Word has length 118 [2023-03-30 23:45:29,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:29,681 INFO L495 AbstractCegarLoop]: Abstraction has 4345 states and 5980 transitions. [2023-03-30 23:45:29,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:45:29,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4345 states and 5980 transitions. [2023-03-30 23:45:29,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-03-30 23:45:29,684 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:29,685 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:45:29,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:45:29,685 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:29,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:29,686 INFO L85 PathProgramCache]: Analyzing trace with hash -403721051, now seen corresponding path program 1 times [2023-03-30 23:45:29,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:29,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589552616] [2023-03-30 23:45:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:29,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:29,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:29,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:29,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:45:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:45:30,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:30,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589552616] [2023-03-30 23:45:30,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589552616] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:30,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964700930] [2023-03-30 23:45:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:30,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:30,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:30,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:45:30,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:45:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:30,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:45:30,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:45:30,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:45:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:45:30,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964700930] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:45:30,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:45:30,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:45:30,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843287054] [2023-03-30 23:45:30,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:45:30,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:45:30,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:30,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:45:30,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:45:30,764 INFO L87 Difference]: Start difference. First operand 4345 states and 5980 transitions. Second operand has 11 states, 11 states have (on average 34.36363636363637) internal successors, (378), 9 states have internal predecessors, (378), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:45:38,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:38,105 INFO L93 Difference]: Finished difference Result 14716 states and 20304 transitions. [2023-03-30 23:45:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 23:45:38,106 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 34.36363636363637) internal successors, (378), 9 states have internal predecessors, (378), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 244 [2023-03-30 23:45:38,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:38,145 INFO L225 Difference]: With dead ends: 14716 [2023-03-30 23:45:38,145 INFO L226 Difference]: Without dead ends: 8832 [2023-03-30 23:45:38,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 492 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-03-30 23:45:38,186 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3754 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 12035 mSolverCounterSat, 1946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3757 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 13981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1946 IncrementalHoareTripleChecker+Valid, 12035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:38,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3757 Valid, 208 Invalid, 13981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1946 Valid, 12035 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-03-30 23:45:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8832 states. [2023-03-30 23:45:38,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8832 to 7297. [2023-03-30 23:45:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7297 states, 7129 states have (on average 1.1161453219245336) internal successors, (7957), 7172 states have internal predecessors, (7957), 32 states have call successors, (32), 32 states have call predecessors, (32), 135 states have return successors, (343), 92 states have call predecessors, (343), 31 states have call successors, (343) [2023-03-30 23:45:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7297 states to 7297 states and 8332 transitions. [2023-03-30 23:45:38,410 INFO L78 Accepts]: Start accepts. Automaton has 7297 states and 8332 transitions. Word has length 244 [2023-03-30 23:45:38,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:38,410 INFO L495 AbstractCegarLoop]: Abstraction has 7297 states and 8332 transitions. [2023-03-30 23:45:38,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 34.36363636363637) internal successors, (378), 9 states have internal predecessors, (378), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:45:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 7297 states and 8332 transitions. [2023-03-30 23:45:38,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2023-03-30 23:45:38,414 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:38,414 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:45:38,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:45:38,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:38,620 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:38,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:38,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1121925142, now seen corresponding path program 1 times [2023-03-30 23:45:38,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:38,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709009639] [2023-03-30 23:45:38,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:38,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:39,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:39,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:39,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:45:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 82 proven. 8 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-03-30 23:45:39,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:39,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709009639] [2023-03-30 23:45:39,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709009639] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:39,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689369534] [2023-03-30 23:45:39,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:39,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:39,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:39,133 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:45:39,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:45:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:39,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:45:39,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-03-30 23:45:39,304 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:45:39,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689369534] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:39,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:45:39,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2023-03-30 23:45:39,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232085097] [2023-03-30 23:45:39,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:39,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:45:39,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:39,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:45:39,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:45:39,310 INFO L87 Difference]: Start difference. First operand 7297 states and 8332 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:45:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:41,008 INFO L93 Difference]: Finished difference Result 14588 states and 16658 transitions. [2023-03-30 23:45:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:45:41,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 277 [2023-03-30 23:45:41,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:41,033 INFO L225 Difference]: With dead ends: 14588 [2023-03-30 23:45:41,033 INFO L226 Difference]: Without dead ends: 7297 [2023-03-30 23:45:41,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:45:41,048 INFO L413 NwaCegarLoop]: 918 mSDtfsCounter, 726 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:41,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 944 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 23:45:41,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7297 states. [2023-03-30 23:45:41,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7297 to 7289. [2023-03-30 23:45:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7289 states, 7124 states have (on average 1.0765019651880965) internal successors, (7669), 7166 states have internal predecessors, (7669), 32 states have call successors, (32), 32 states have call predecessors, (32), 132 states have return successors, (244), 90 states have call predecessors, (244), 31 states have call successors, (244) [2023-03-30 23:45:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7289 states to 7289 states and 7945 transitions. [2023-03-30 23:45:41,228 INFO L78 Accepts]: Start accepts. Automaton has 7289 states and 7945 transitions. Word has length 277 [2023-03-30 23:45:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:41,229 INFO L495 AbstractCegarLoop]: Abstraction has 7289 states and 7945 transitions. [2023-03-30 23:45:41,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:45:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 7289 states and 7945 transitions. [2023-03-30 23:45:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2023-03-30 23:45:41,236 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:41,236 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, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:45:41,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:45:41,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 23:45:41,442 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:41,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:41,443 INFO L85 PathProgramCache]: Analyzing trace with hash 445091965, now seen corresponding path program 1 times [2023-03-30 23:45:41,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:41,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207200789] [2023-03-30 23:45:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:41,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:41,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:41,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:41,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:45:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:41,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:45:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 129 proven. 3 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-03-30 23:45:41,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:41,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207200789] [2023-03-30 23:45:41,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207200789] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:41,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995737571] [2023-03-30 23:45:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:41,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:41,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:41,842 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:45:41,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:45:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:41,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:45:41,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-03-30 23:45:42,033 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:45:42,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995737571] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:42,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:45:42,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:45:42,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964949726] [2023-03-30 23:45:42,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:42,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:45:42,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:42,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:45:42,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:45:42,035 INFO L87 Difference]: Start difference. First operand 7289 states and 7945 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:45:43,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:43,870 INFO L93 Difference]: Finished difference Result 18850 states and 20880 transitions. [2023-03-30 23:45:43,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:45:43,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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 346 [2023-03-30 23:45:43,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:43,899 INFO L225 Difference]: With dead ends: 18850 [2023-03-30 23:45:43,899 INFO L226 Difference]: Without dead ends: 11567 [2023-03-30 23:45:43,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:45:43,913 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 676 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:43,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 282 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 23:45:43,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11567 states. [2023-03-30 23:45:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11567 to 10865. [2023-03-30 23:45:44,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10865 states, 10644 states have (on average 1.0697106350995866) internal successors, (11386), 10698 states have internal predecessors, (11386), 47 states have call successors, (47), 47 states have call predecessors, (47), 173 states have return successors, (445), 119 states have call predecessors, (445), 46 states have call successors, (445) [2023-03-30 23:45:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10865 states to 10865 states and 11878 transitions. [2023-03-30 23:45:44,109 INFO L78 Accepts]: Start accepts. Automaton has 10865 states and 11878 transitions. Word has length 346 [2023-03-30 23:45:44,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:44,110 INFO L495 AbstractCegarLoop]: Abstraction has 10865 states and 11878 transitions. [2023-03-30 23:45:44,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:45:44,111 INFO L276 IsEmpty]: Start isEmpty. Operand 10865 states and 11878 transitions. [2023-03-30 23:45:44,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2023-03-30 23:45:44,116 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:44,116 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:45:44,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-30 23:45:44,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:44,322 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:44,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:44,323 INFO L85 PathProgramCache]: Analyzing trace with hash -988477582, now seen corresponding path program 1 times [2023-03-30 23:45:44,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:44,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30748851] [2023-03-30 23:45:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:44,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:44,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:44,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:44,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:45:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:44,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:45:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 129 proven. 3 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:45:44,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:44,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30748851] [2023-03-30 23:45:44,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30748851] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:44,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643115910] [2023-03-30 23:45:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:44,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:44,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:44,633 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:45:44,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:45:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:44,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:45:44,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-30 23:45:44,822 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:45:44,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643115910] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:44,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:45:44,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:45:44,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392850378] [2023-03-30 23:45:44,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:44,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:45:44,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:44,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:45:44,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:45:44,824 INFO L87 Difference]: Start difference. First operand 10865 states and 11878 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:45:46,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:46,621 INFO L93 Difference]: Finished difference Result 25997 states and 28758 transitions. [2023-03-30 23:45:46,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:45:46,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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 365 [2023-03-30 23:45:46,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:46,664 INFO L225 Difference]: With dead ends: 25997 [2023-03-30 23:45:46,664 INFO L226 Difference]: Without dead ends: 15138 [2023-03-30 23:45:46,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:45:46,686 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 689 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1705 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 1705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:46,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 194 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 1705 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 23:45:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15138 states. [2023-03-30 23:45:46,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15138 to 13727. [2023-03-30 23:45:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13727 states, 13461 states have (on average 1.0728029121164846) internal successors, (14441), 13524 states have internal predecessors, (14441), 59 states have call successors, (59), 59 states have call predecessors, (59), 206 states have return successors, (651), 143 states have call predecessors, (651), 58 states have call successors, (651) [2023-03-30 23:45:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13727 states to 13727 states and 15151 transitions. [2023-03-30 23:45:46,923 INFO L78 Accepts]: Start accepts. Automaton has 13727 states and 15151 transitions. Word has length 365 [2023-03-30 23:45:46,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:46,923 INFO L495 AbstractCegarLoop]: Abstraction has 13727 states and 15151 transitions. [2023-03-30 23:45:46,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:45:46,924 INFO L276 IsEmpty]: Start isEmpty. Operand 13727 states and 15151 transitions. [2023-03-30 23:45:46,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2023-03-30 23:45:46,932 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:46,932 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:45:46,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 23:45:47,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:47,138 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:47,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:47,139 INFO L85 PathProgramCache]: Analyzing trace with hash -595868530, now seen corresponding path program 1 times [2023-03-30 23:45:47,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:47,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945972277] [2023-03-30 23:45:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:47,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:47,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:47,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:47,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:45:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:47,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:45:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 129 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:45:47,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:47,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945972277] [2023-03-30 23:45:47,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945972277] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:47,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310501980] [2023-03-30 23:45:47,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:47,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:47,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:47,547 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:45:47,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:45:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:47,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:45:47,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:45:47,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:45:47,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310501980] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:47,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:45:47,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:45:47,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802248363] [2023-03-30 23:45:47,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:47,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:45:47,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:47,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:45:47,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:45:47,765 INFO L87 Difference]: Start difference. First operand 13727 states and 15151 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:45:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:49,609 INFO L93 Difference]: Finished difference Result 39532 states and 44396 transitions. [2023-03-30 23:45:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:45:49,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 427 [2023-03-30 23:45:49,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:49,692 INFO L225 Difference]: With dead ends: 39532 [2023-03-30 23:45:49,692 INFO L226 Difference]: Without dead ends: 25811 [2023-03-30 23:45:49,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:45:49,719 INFO L413 NwaCegarLoop]: 981 mSDtfsCounter, 663 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:49,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 1007 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 23:45:49,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25811 states. [2023-03-30 23:45:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25811 to 24407. [2023-03-30 23:45:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24407 states, 23991 states have (on average 1.0591471801925723) internal successors, (25410), 24084 states have internal predecessors, (25410), 104 states have call successors, (104), 104 states have call predecessors, (104), 311 states have return successors, (1391), 218 states have call predecessors, (1391), 103 states have call successors, (1391) [2023-03-30 23:45:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24407 states to 24407 states and 26905 transitions. [2023-03-30 23:45:50,124 INFO L78 Accepts]: Start accepts. Automaton has 24407 states and 26905 transitions. Word has length 427 [2023-03-30 23:45:50,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:50,125 INFO L495 AbstractCegarLoop]: Abstraction has 24407 states and 26905 transitions. [2023-03-30 23:45:50,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:45:50,125 INFO L276 IsEmpty]: Start isEmpty. Operand 24407 states and 26905 transitions. [2023-03-30 23:45:50,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-03-30 23:45:50,134 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:50,135 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 23:45:50,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 23:45:50,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:50,342 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:50,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:50,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1120793791, now seen corresponding path program 1 times [2023-03-30 23:45:50,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:50,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309774792] [2023-03-30 23:45:50,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:50,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:50,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:50,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:50,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:45:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:50,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:45:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:50,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 305 [2023-03-30 23:45:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 449 proven. 11 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-03-30 23:45:50,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:50,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309774792] [2023-03-30 23:45:50,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309774792] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:50,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118517837] [2023-03-30 23:45:50,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:50,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:50,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:50,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:45:50,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 23:45:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:51,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:45:51,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 455 proven. 2 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-03-30 23:45:51,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:45:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 455 proven. 2 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-03-30 23:45:51,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118517837] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:45:51,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:45:51,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2023-03-30 23:45:51,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855590182] [2023-03-30 23:45:51,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:45:51,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-30 23:45:51,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:51,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-30 23:45:51,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:45:51,634 INFO L87 Difference]: Start difference. First operand 24407 states and 26905 transitions. Second operand has 13 states, 13 states have (on average 37.61538461538461) internal successors, (489), 11 states have internal predecessors, (489), 5 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:45:54,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:54,814 INFO L93 Difference]: Finished difference Result 52496 states and 58062 transitions. [2023-03-30 23:45:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:45:54,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 37.61538461538461) internal successors, (489), 11 states have internal predecessors, (489), 5 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 454 [2023-03-30 23:45:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:54,891 INFO L225 Difference]: With dead ends: 52496 [2023-03-30 23:45:54,891 INFO L226 Difference]: Without dead ends: 28095 [2023-03-30 23:45:54,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 918 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2023-03-30 23:45:54,929 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 5880 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3314 mSolverCounterSat, 1290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5880 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 4604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1290 IncrementalHoareTripleChecker+Valid, 3314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:54,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5880 Valid, 102 Invalid, 4604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1290 Valid, 3314 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-03-30 23:45:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28095 states. [2023-03-30 23:45:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28095 to 28069. [2023-03-30 23:45:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28069 states, 27562 states have (on average 1.047456643204412) internal successors, (28870), 27686 states have internal predecessors, (28870), 119 states have call successors, (119), 119 states have call predecessors, (119), 387 states have return successors, (1459), 263 states have call predecessors, (1459), 118 states have call successors, (1459) [2023-03-30 23:45:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28069 states to 28069 states and 30448 transitions. [2023-03-30 23:45:55,494 INFO L78 Accepts]: Start accepts. Automaton has 28069 states and 30448 transitions. Word has length 454 [2023-03-30 23:45:55,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:55,495 INFO L495 AbstractCegarLoop]: Abstraction has 28069 states and 30448 transitions. [2023-03-30 23:45:55,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.61538461538461) internal successors, (489), 11 states have internal predecessors, (489), 5 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:45:55,496 INFO L276 IsEmpty]: Start isEmpty. Operand 28069 states and 30448 transitions. [2023-03-30 23:45:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-03-30 23:45:55,506 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:55,507 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:45:55,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 23:45:55,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:55,714 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:55,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:55,714 INFO L85 PathProgramCache]: Analyzing trace with hash -54507026, now seen corresponding path program 1 times [2023-03-30 23:45:55,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:55,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330915857] [2023-03-30 23:45:55,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:55,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:55,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:55,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:56,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:45:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:56,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2023-03-30 23:45:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 249 proven. 93 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-03-30 23:45:56,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:56,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330915857] [2023-03-30 23:45:56,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330915857] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:56,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615745291] [2023-03-30 23:45:56,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:56,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:56,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:56,213 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) [2023-03-30 23:45:56,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 23:45:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:56,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:45:56,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 391 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-03-30 23:45:56,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:45:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 250 proven. 94 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-03-30 23:45:57,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615745291] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:45:57,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:45:57,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:45:57,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165911457] [2023-03-30 23:45:57,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:45:57,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:45:57,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:57,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:45:57,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:45:57,302 INFO L87 Difference]: Start difference. First operand 28069 states and 30448 transitions. Second operand has 12 states, 12 states have (on average 70.58333333333333) internal successors, (847), 10 states have internal predecessors, (847), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9)