/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/Problem13_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:24:14,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:24:14,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:24:14,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:24:14,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:24:14,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:24:14,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:24:14,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:24:14,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:24:14,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:24:14,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:24:14,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:24:14,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:24:14,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:24:14,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:24:14,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:24:14,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:24:14,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:24:14,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:24:14,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:24:14,426 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 23:24:14,455 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:24:14,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:24:14,456 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:24:14,456 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:24:14,457 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:24:14,457 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:24:14,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:24:14,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:24:14,458 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:24:14,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:24:14,459 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:24:14,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:24:14,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:24:14,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:24:14,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:24:14,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:24:14,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:24:14,460 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:24:14,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:24:14,460 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:24:14,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:24:14,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:24:14,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:24:14,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:24:14,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:24:14,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:24:14,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:24:14,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:24:14,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:24:14,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:24:14,462 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:24:14,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:24:14,463 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:24:14,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:24:14,463 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:24:14,463 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:24:14,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:24:14,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:24:14,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:24:14,749 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:24:14,749 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:24:14,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label23.c [2023-03-30 23:24:15,916 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:24:16,377 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:24:16,377 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label23.c [2023-03-30 23:24:16,410 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5e663d93/b22d0a854bc54f6a937ee2860708fce3/FLAG667f38d72 [2023-03-30 23:24:16,425 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5e663d93/b22d0a854bc54f6a937ee2860708fce3 [2023-03-30 23:24:16,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:24:16,429 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:24:16,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:24:16,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:24:16,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:24:16,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:24:16" (1/1) ... [2023-03-30 23:24:16,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b44a8ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:16, skipping insertion in model container [2023-03-30 23:24:16,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:24:16" (1/1) ... [2023-03-30 23:24:16,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:24:16,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:24:16,786 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/Problem13_label23.c[2192,2205] [2023-03-30 23:24:17,604 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:24:17,616 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:24:17,639 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/Problem13_label23.c[2192,2205] [2023-03-30 23:24:18,091 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:24:18,115 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:24:18,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:18 WrapperNode [2023-03-30 23:24:18,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:24:18,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:24:18,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:24:18,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:24:18,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:18" (1/1) ... [2023-03-30 23:24:18,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:18" (1/1) ... [2023-03-30 23:24:18,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:18" (1/1) ... [2023-03-30 23:24:18,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:18" (1/1) ... [2023-03-30 23:24:18,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:18" (1/1) ... [2023-03-30 23:24:18,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:18" (1/1) ... [2023-03-30 23:24:18,449 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:18" (1/1) ... [2023-03-30 23:24:18,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:18" (1/1) ... [2023-03-30 23:24:18,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:24:18,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:24:18,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:24:18,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:24:18,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:18" (1/1) ... [2023-03-30 23:24:18,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:24:18,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:24:18,528 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 23:24:18,551 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 23:24:18,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:24:18,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:24:18,570 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:24:18,571 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:24:18,571 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:24:18,571 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:24:18,571 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:24:18,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:24:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:24:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:24:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:24:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:24:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:24:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:24:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:24:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:24:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:24:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:24:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:24:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:24:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:24:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:24:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:24:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:24:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:24:18,663 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:24:18,665 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:24:23,470 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:24:23,483 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:24:23,483 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:24:23,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:24:23 BoogieIcfgContainer [2023-03-30 23:24:23,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:24:23,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:24:23,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:24:23,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:24:23,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:24:16" (1/3) ... [2023-03-30 23:24:23,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8c09c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:24:23, skipping insertion in model container [2023-03-30 23:24:23,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:18" (2/3) ... [2023-03-30 23:24:23,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8c09c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:24:23, skipping insertion in model container [2023-03-30 23:24:23,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:24:23" (3/3) ... [2023-03-30 23:24:23,493 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label23.c [2023-03-30 23:24:23,509 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:24:23,509 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:24:23,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:24:23,584 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;@27e062ba, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:24:23,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:24:23,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 23:24:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-30 23:24:23,597 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:23,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:24:23,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:23,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:23,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1525217644, now seen corresponding path program 1 times [2023-03-30 23:24:23,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:23,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282293985] [2023-03-30 23:24:23,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:23,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:24,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:24,055 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 23:24:24,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:24,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282293985] [2023-03-30 23:24:24,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282293985] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:24:24,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:24:24,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:24:24,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8956139] [2023-03-30 23:24:24,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:24:24,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:24:24,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:24,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:24:24,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:24:24,103 INFO L87 Difference]: Start difference. First operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 23:24:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:24:30,692 INFO L93 Difference]: Finished difference Result 3243 states and 5948 transitions. [2023-03-30 23:24:30,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:24:30,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 19 [2023-03-30 23:24:30,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:24:30,725 INFO L225 Difference]: With dead ends: 3243 [2023-03-30 23:24:30,726 INFO L226 Difference]: Without dead ends: 2045 [2023-03-30 23:24:30,736 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 23:24:30,740 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 3051 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4184 mSolverCounterSat, 994 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3051 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 5178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 994 IncrementalHoareTripleChecker+Valid, 4184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:24:30,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3051 Valid, 270 Invalid, 5178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [994 Valid, 4184 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-03-30 23:24:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2023-03-30 23:24:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1988. [2023-03-30 23:24:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1960 states have (on average 1.7846938775510204) internal successors, (3498), 1962 states have internal predecessors, (3498), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (25), 15 states have call predecessors, (25), 9 states have call successors, (25) [2023-03-30 23:24:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3533 transitions. [2023-03-30 23:24:30,906 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3533 transitions. Word has length 19 [2023-03-30 23:24:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:24:30,907 INFO L495 AbstractCegarLoop]: Abstraction has 1988 states and 3533 transitions. [2023-03-30 23:24:30,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 23:24:30,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3533 transitions. [2023-03-30 23:24:30,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-03-30 23:24:30,911 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:30,911 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:24:30,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:24:30,912 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:30,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:30,913 INFO L85 PathProgramCache]: Analyzing trace with hash 985753717, now seen corresponding path program 1 times [2023-03-30 23:24:30,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:30,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948260484] [2023-03-30 23:24:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:30,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:31,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:31,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:24:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:31,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:31,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948260484] [2023-03-30 23:24:31,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948260484] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:24:31,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:24:31,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:24:31,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846768332] [2023-03-30 23:24:31,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:24:31,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:24:31,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:31,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:24:31,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:24:31,381 INFO L87 Difference]: Start difference. First operand 1988 states and 3533 transitions. Second operand has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 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 23:24:40,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:24:40,188 INFO L93 Difference]: Finished difference Result 7338 states and 13417 transitions. [2023-03-30 23:24:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:24:40,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 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 88 [2023-03-30 23:24:40,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:24:40,224 INFO L225 Difference]: With dead ends: 7338 [2023-03-30 23:24:40,225 INFO L226 Difference]: Without dead ends: 5356 [2023-03-30 23:24:40,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:24:40,239 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 5285 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 7921 mSolverCounterSat, 2185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5285 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 10106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2185 IncrementalHoareTripleChecker+Valid, 7921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:24:40,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5285 Valid, 709 Invalid, 10106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2185 Valid, 7921 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2023-03-30 23:24:40,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2023-03-30 23:24:40,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 5331. [2023-03-30 23:24:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5331 states, 5228 states have (on average 1.5003825554705432) internal successors, (7844), 5242 states have internal predecessors, (7844), 26 states have call successors, (26), 26 states have call predecessors, (26), 76 states have return successors, (225), 62 states have call predecessors, (225), 25 states have call successors, (225) [2023-03-30 23:24:40,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 8095 transitions. [2023-03-30 23:24:40,403 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 8095 transitions. Word has length 88 [2023-03-30 23:24:40,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:24:40,403 INFO L495 AbstractCegarLoop]: Abstraction has 5331 states and 8095 transitions. [2023-03-30 23:24:40,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 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 23:24:40,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 8095 transitions. [2023-03-30 23:24:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-03-30 23:24:40,410 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:40,411 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:24:40,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:24:40,411 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:40,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:40,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2082104257, now seen corresponding path program 1 times [2023-03-30 23:24:40,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:40,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35878023] [2023-03-30 23:24:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:40,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:40,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:40,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:24:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:40,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:40,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35878023] [2023-03-30 23:24:40,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35878023] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:24:40,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:24:40,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:24:40,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244410301] [2023-03-30 23:24:40,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:24:40,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:24:40,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:40,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:24:40,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:24:40,733 INFO L87 Difference]: Start difference. First operand 5331 states and 8095 transitions. Second operand has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 4 states have internal predecessors, (88), 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 23:24:48,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:24:48,164 INFO L93 Difference]: Finished difference Result 16024 states and 25154 transitions. [2023-03-30 23:24:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:24:48,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 4 states have internal predecessors, (88), 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 94 [2023-03-30 23:24:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:24:48,219 INFO L225 Difference]: With dead ends: 16024 [2023-03-30 23:24:48,219 INFO L226 Difference]: Without dead ends: 10699 [2023-03-30 23:24:48,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:24:48,235 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 3156 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 8253 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3156 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 9414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 8253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:24:48,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3156 Valid, 786 Invalid, 9414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 8253 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-03-30 23:24:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10699 states. [2023-03-30 23:24:48,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10699 to 10504. [2023-03-30 23:24:48,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10504 states, 10232 states have (on average 1.3575058639562159) internal successors, (13890), 10286 states have internal predecessors, (13890), 50 states have call successors, (50), 50 states have call predecessors, (50), 221 states have return successors, (917), 167 states have call predecessors, (917), 49 states have call successors, (917) [2023-03-30 23:24:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10504 states to 10504 states and 14857 transitions. [2023-03-30 23:24:48,518 INFO L78 Accepts]: Start accepts. Automaton has 10504 states and 14857 transitions. Word has length 94 [2023-03-30 23:24:48,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:24:48,519 INFO L495 AbstractCegarLoop]: Abstraction has 10504 states and 14857 transitions. [2023-03-30 23:24:48,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 4 states have internal predecessors, (88), 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 23:24:48,519 INFO L276 IsEmpty]: Start isEmpty. Operand 10504 states and 14857 transitions. [2023-03-30 23:24:48,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-03-30 23:24:48,522 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:48,523 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:24:48,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:24:48,523 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:48,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:48,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1370124349, now seen corresponding path program 1 times [2023-03-30 23:24:48,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:48,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399043215] [2023-03-30 23:24:48,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:48,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:48,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:48,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:24:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:48,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:48,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399043215] [2023-03-30 23:24:48,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399043215] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:24:48,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:24:48,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:24:48,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045183152] [2023-03-30 23:24:48,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:24:48,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:24:48,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:48,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:24:48,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:24:48,920 INFO L87 Difference]: Start difference. First operand 10504 states and 14857 transitions. Second operand has 8 states, 7 states have (on average 16.857142857142858) internal successors, (118), 5 states have internal predecessors, (118), 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 23:24:57,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:24:57,835 INFO L93 Difference]: Finished difference Result 40087 states and 62005 transitions. [2023-03-30 23:24:57,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:24:57,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 16.857142857142858) internal successors, (118), 5 states have internal predecessors, (118), 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 124 [2023-03-30 23:24:57,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:24:57,974 INFO L225 Difference]: With dead ends: 40087 [2023-03-30 23:24:57,974 INFO L226 Difference]: Without dead ends: 29589 [2023-03-30 23:24:58,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:24:58,012 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 5706 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 9431 mSolverCounterSat, 2208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5706 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 11639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2208 IncrementalHoareTripleChecker+Valid, 9431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:24:58,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5706 Valid, 886 Invalid, 11639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2208 Valid, 9431 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2023-03-30 23:24:58,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29589 states. [2023-03-30 23:24:58,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29589 to 29507. [2023-03-30 23:24:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29507 states, 28552 states have (on average 1.261032502101429) internal successors, (36005), 28803 states have internal predecessors, (36005), 138 states have call successors, (138), 138 states have call predecessors, (138), 816 states have return successors, (6615), 565 states have call predecessors, (6615), 137 states have call successors, (6615) [2023-03-30 23:24:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29507 states to 29507 states and 42758 transitions. [2023-03-30 23:24:58,790 INFO L78 Accepts]: Start accepts. Automaton has 29507 states and 42758 transitions. Word has length 124 [2023-03-30 23:24:58,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:24:58,791 INFO L495 AbstractCegarLoop]: Abstraction has 29507 states and 42758 transitions. [2023-03-30 23:24:58,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 16.857142857142858) internal successors, (118), 5 states have internal predecessors, (118), 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 23:24:58,792 INFO L276 IsEmpty]: Start isEmpty. Operand 29507 states and 42758 transitions. [2023-03-30 23:24:58,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-03-30 23:24:58,794 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:58,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:24:58,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-30 23:24:58,794 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:58,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:58,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1472365483, now seen corresponding path program 1 times [2023-03-30 23:24:58,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:58,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340913486] [2023-03-30 23:24:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:58,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:58,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:58,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:24:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:59,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:59,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340913486] [2023-03-30 23:24:59,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340913486] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:24:59,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484253479] [2023-03-30 23:24:59,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:59,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:24:59,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:24:59,137 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 23:24:59,158 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 23:24:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:59,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:24:59,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:24:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:59,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:24:59,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484253479] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:24:59,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:24:59,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:24:59,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007352215] [2023-03-30 23:24:59,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:24:59,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:24:59,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:59,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:24:59,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:24:59,374 INFO L87 Difference]: Start difference. First operand 29507 states and 42758 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:25:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:25:03,003 INFO L93 Difference]: Finished difference Result 59009 states and 85694 transitions. [2023-03-30 23:25:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:25:03,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 139 [2023-03-30 23:25:03,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:25:03,117 INFO L225 Difference]: With dead ends: 59009 [2023-03-30 23:25:03,117 INFO L226 Difference]: Without dead ends: 29508 [2023-03-30 23:25:03,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:25:03,196 INFO L413 NwaCegarLoop]: 1413 mSDtfsCounter, 1213 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1213 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:25:03,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1213 Valid, 1519 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 2458 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-30 23:25:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29508 states. [2023-03-30 23:25:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29508 to 25482. [2023-03-30 23:25:03,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25482 states, 24571 states have (on average 1.1944975784461358) internal successors, (29350), 24820 states have internal predecessors, (29350), 118 states have call successors, (118), 118 states have call predecessors, (118), 792 states have return successors, (4281), 543 states have call predecessors, (4281), 117 states have call successors, (4281) [2023-03-30 23:25:03,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25482 states to 25482 states and 33749 transitions. [2023-03-30 23:25:03,933 INFO L78 Accepts]: Start accepts. Automaton has 25482 states and 33749 transitions. Word has length 139 [2023-03-30 23:25:03,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:25:03,934 INFO L495 AbstractCegarLoop]: Abstraction has 25482 states and 33749 transitions. [2023-03-30 23:25:03,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:25:03,934 INFO L276 IsEmpty]: Start isEmpty. Operand 25482 states and 33749 transitions. [2023-03-30 23:25:03,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-03-30 23:25:03,940 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:25:03,940 INFO L195 NwaCegarLoop]: trace histogram [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, 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 23:25:03,951 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 23:25:04,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:04,146 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:25:04,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:25:04,146 INFO L85 PathProgramCache]: Analyzing trace with hash -997400319, now seen corresponding path program 1 times [2023-03-30 23:25:04,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:25:04,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037137251] [2023-03-30 23:25:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:04,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:25:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:04,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:25:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:04,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:25:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:04,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-03-30 23:25:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:04,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-03-30 23:25:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 39 proven. 3 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2023-03-30 23:25:04,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:25:04,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037137251] [2023-03-30 23:25:04,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037137251] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:25:04,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173058867] [2023-03-30 23:25:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:04,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:04,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:25:04,457 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 23:25:04,482 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 23:25:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:04,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 23:25:04,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:25:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2023-03-30 23:25:04,645 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:25:04,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173058867] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:25:04,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:25:04,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-03-30 23:25:04,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850152041] [2023-03-30 23:25:04,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:25:04,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:25:04,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:25:04,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:25:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:25:04,647 INFO L87 Difference]: Start difference. First operand 25482 states and 33749 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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)