/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/Problem19_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:51:46,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:51:46,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:51:46,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 23:51:46,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 23:51:46,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 23:51:46,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 23:51:46,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 23:51:46,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 23:51:46,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 23:51:46,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 23:51:46,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 23:51:46,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 23:51:46,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 23:51:46,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 23:51:46,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 23:51:46,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 23:51:46,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 23:51:46,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 23:51:46,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 23:51:46,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 23:51:46,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 23:51:46,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 23:51:46,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 23:51:46,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 23:51:46,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:51:46,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:51:46,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:51:46,483 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 23:51:46,513 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:51:46,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:51:46,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:51:46,513 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:51:46,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:51:46,515 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:51:46,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:51:46,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:51:46,515 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:51:46,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:51:46,516 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:51:46,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:51:46,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:51:46,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:51:46,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:51:46,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:51:46,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:51:46,517 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:51:46,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:51:46,517 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:51:46,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:51:46,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:51:46,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:51:46,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:51:46,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:51:46,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:51:46,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:51:46,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:51:46,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:51:46,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:51:46,519 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:51:46,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:51:46,519 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:51:46,519 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:51:46,520 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:51:46,520 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:51:46,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:51:46,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:51:46,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:51:46,805 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:51:46,805 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:51:46,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label13.c [2023-04-01 23:51:47,914 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:51:48,435 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:51:48,435 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label13.c [2023-04-01 23:51:48,485 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85757d12b/3ca2f58c80cd438c91cd0b5ea437d032/FLAGf0149f936 [2023-04-01 23:51:48,499 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85757d12b/3ca2f58c80cd438c91cd0b5ea437d032 [2023-04-01 23:51:48,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:51:48,503 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:51:48,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:51:48,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:51:48,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:51:48,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:51:48" (1/1) ... [2023-04-01 23:51:48,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71f0bbbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:51:48, skipping insertion in model container [2023-04-01 23:51:48,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:51:48" (1/1) ... [2023-04-01 23:51:48,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:51:48,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:51:49,021 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/Problem19_label13.c[4813,4826] [2023-04-01 23:51:50,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:51:50,167 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:51:50,201 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/Problem19_label13.c[4813,4826] [2023-04-01 23:51:50,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:51:50,872 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:51:50,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:51:50 WrapperNode [2023-04-01 23:51:50,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:51:50,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:51:50,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:51:50,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:51:50,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:51:50" (1/1) ... [2023-04-01 23:51:50,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:51:50" (1/1) ... [2023-04-01 23:51:51,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:51:50" (1/1) ... [2023-04-01 23:51:51,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:51:50" (1/1) ... [2023-04-01 23:51:51,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:51:50" (1/1) ... [2023-04-01 23:51:51,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:51:50" (1/1) ... [2023-04-01 23:51:51,228 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:51:50" (1/1) ... [2023-04-01 23:51:51,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:51:50" (1/1) ... [2023-04-01 23:51:51,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:51:51,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:51:51,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:51:51,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:51:51,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:51:50" (1/1) ... [2023-04-01 23:51:51,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:51:51,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:51:51,422 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 23:51:51,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 23:51:51,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:51:51,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:51:51,458 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:51:51,458 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:51:51,458 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:51:51,458 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 23:51:51,458 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 23:51:51,458 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 23:51:51,458 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 23:51:51,458 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:51:51,458 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:51:51,458 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:51:51,459 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 23:51:51,459 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 23:51:51,459 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 23:51:51,459 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 23:51:51,459 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:51:51,459 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:51:51,459 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:51:51,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:51:51,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:51:51,459 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:51:51,459 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:51:51,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:51:51,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:51:51,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:51:51,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:51:51,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:51:51,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:51:51,525 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:51:51,527 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:51:58,721 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:51:58,743 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:51:58,743 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:51:58,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:51:58 BoogieIcfgContainer [2023-04-01 23:51:58,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:51:58,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:51:58,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:51:58,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:51:58,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:51:48" (1/3) ... [2023-04-01 23:51:58,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0d92a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:51:58, skipping insertion in model container [2023-04-01 23:51:58,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:51:50" (2/3) ... [2023-04-01 23:51:58,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0d92a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:51:58, skipping insertion in model container [2023-04-01 23:51:58,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:51:58" (3/3) ... [2023-04-01 23:51:58,755 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label13.c [2023-04-01 23:51:58,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:51:58,771 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:51:58,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:51:58,856 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;@e602114, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:51:58,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:51:58,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 23:51:58,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 23:51:58,874 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:51:58,875 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] [2023-04-01 23:51:58,875 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:51:58,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:51:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1297027800, now seen corresponding path program 1 times [2023-04-01 23:51:58,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:51:58,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248808166] [2023-04-01 23:51:58,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:51:58,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:51:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:59,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:51:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:51:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:51:59,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:51:59,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248808166] [2023-04-01 23:51:59,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248808166] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:51:59,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:51:59,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 23:51:59,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781600241] [2023-04-01 23:51:59,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:51:59,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:51:59,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:51:59,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:51:59,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:51:59,498 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:52:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:52:12,813 INFO L93 Difference]: Finished difference Result 6480 states and 12299 transitions. [2023-04-01 23:52:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:52:12,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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 41 [2023-04-01 23:52:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:52:12,859 INFO L225 Difference]: With dead ends: 6480 [2023-04-01 23:52:12,859 INFO L226 Difference]: Without dead ends: 4635 [2023-04-01 23:52:12,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:52:12,875 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 7780 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 9808 mSolverCounterSat, 2328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7780 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 12136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2328 IncrementalHoareTripleChecker+Valid, 9808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:52:12,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7780 Valid, 493 Invalid, 12136 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2328 Valid, 9808 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2023-04-01 23:52:12,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2023-04-01 23:52:13,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 4629. [2023-04-01 23:52:13,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4571 states have (on average 1.6740319404944213) internal successors, (7652), 4574 states have internal predecessors, (7652), 20 states have call successors, (20), 20 states have call predecessors, (20), 37 states have return successors, (77), 34 states have call predecessors, (77), 19 states have call successors, (77) [2023-04-01 23:52:13,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 7749 transitions. [2023-04-01 23:52:13,091 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 7749 transitions. Word has length 41 [2023-04-01 23:52:13,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:52:13,092 INFO L495 AbstractCegarLoop]: Abstraction has 4629 states and 7749 transitions. [2023-04-01 23:52:13,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:52:13,093 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 7749 transitions. [2023-04-01 23:52:13,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-01 23:52:13,103 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:52:13,104 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:52:13,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:52:13,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:52:13,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:52:13,106 INFO L85 PathProgramCache]: Analyzing trace with hash 100635198, now seen corresponding path program 1 times [2023-04-01 23:52:13,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:52:13,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061235975] [2023-04-01 23:52:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:52:13,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:52:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:13,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:52:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:13,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:52:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:52:13,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:52:13,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061235975] [2023-04-01 23:52:13,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061235975] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:52:13,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:52:13,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 23:52:13,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419338651] [2023-04-01 23:52:13,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:52:13,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 23:52:13,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:52:13,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 23:52:13,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:52:13,517 INFO L87 Difference]: Start difference. First operand 4629 states and 7749 transitions. Second operand has 8 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:52:24,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:52:24,831 INFO L93 Difference]: Finished difference Result 10809 states and 17786 transitions. [2023-04-01 23:52:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 23:52:24,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 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 119 [2023-04-01 23:52:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:52:24,863 INFO L225 Difference]: With dead ends: 10809 [2023-04-01 23:52:24,864 INFO L226 Difference]: Without dead ends: 6186 [2023-04-01 23:52:24,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:52:24,881 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 5313 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 11948 mSolverCounterSat, 1993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5313 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 13941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1993 IncrementalHoareTripleChecker+Valid, 11948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:52:24,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5313 Valid, 818 Invalid, 13941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1993 Valid, 11948 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2023-04-01 23:52:24,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2023-04-01 23:52:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 6137. [2023-04-01 23:52:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6137 states, 6029 states have (on average 1.4795156742411677) internal successors, (8920), 6039 states have internal predecessors, (8920), 26 states have call successors, (26), 26 states have call predecessors, (26), 81 states have return successors, (175), 71 states have call predecessors, (175), 25 states have call successors, (175) [2023-04-01 23:52:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6137 states to 6137 states and 9121 transitions. [2023-04-01 23:52:25,041 INFO L78 Accepts]: Start accepts. Automaton has 6137 states and 9121 transitions. Word has length 119 [2023-04-01 23:52:25,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:52:25,044 INFO L495 AbstractCegarLoop]: Abstraction has 6137 states and 9121 transitions. [2023-04-01 23:52:25,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:52:25,044 INFO L276 IsEmpty]: Start isEmpty. Operand 6137 states and 9121 transitions. [2023-04-01 23:52:25,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-01 23:52:25,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:52:25,048 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:52:25,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:52:25,048 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:52:25,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:52:25,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1236366482, now seen corresponding path program 1 times [2023-04-01 23:52:25,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:52:25,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370646023] [2023-04-01 23:52:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:52:25,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:52:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:25,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:52:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:25,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:52:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:52:25,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:52:25,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370646023] [2023-04-01 23:52:25,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370646023] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:52:25,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:52:25,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:52:25,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445881634] [2023-04-01 23:52:25,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:52:25,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:52:25,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:52:25,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:52:25,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:52:25,429 INFO L87 Difference]: Start difference. First operand 6137 states and 9121 transitions. Second operand has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:52:36,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:52:36,235 INFO L93 Difference]: Finished difference Result 18713 states and 28143 transitions. [2023-04-01 23:52:36,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:52:36,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 4 states have internal predecessors, (116), 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 122 [2023-04-01 23:52:36,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:52:36,306 INFO L225 Difference]: With dead ends: 18713 [2023-04-01 23:52:36,307 INFO L226 Difference]: Without dead ends: 12582 [2023-04-01 23:52:36,325 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 [2023-04-01 23:52:36,328 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 14123 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 9844 mSolverCounterSat, 829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14123 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 10673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 9844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:52:36,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14123 Valid, 783 Invalid, 10673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 9844 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2023-04-01 23:52:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12582 states. [2023-04-01 23:52:36,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12582 to 12184. [2023-04-01 23:52:36,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12184 states, 11913 states have (on average 1.428859229413246) internal successors, (17022), 11946 states have internal predecessors, (17022), 50 states have call successors, (50), 50 states have call predecessors, (50), 220 states have return successors, (561), 187 states have call predecessors, (561), 49 states have call successors, (561) [2023-04-01 23:52:36,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12184 states to 12184 states and 17633 transitions. [2023-04-01 23:52:36,651 INFO L78 Accepts]: Start accepts. Automaton has 12184 states and 17633 transitions. Word has length 122 [2023-04-01 23:52:36,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:52:36,653 INFO L495 AbstractCegarLoop]: Abstraction has 12184 states and 17633 transitions. [2023-04-01 23:52:36,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:52:36,654 INFO L276 IsEmpty]: Start isEmpty. Operand 12184 states and 17633 transitions. [2023-04-01 23:52:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-04-01 23:52:36,659 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:52:36,660 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:52:36,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:52:36,660 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:52:36,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:52:36,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1945274264, now seen corresponding path program 1 times [2023-04-01 23:52:36,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:52:36,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463656355] [2023-04-01 23:52:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:52:36,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:52:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:36,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:52:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:36,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:52:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:52:37,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:52:37,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463656355] [2023-04-01 23:52:37,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463656355] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:52:37,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:52:37,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:52:37,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577796473] [2023-04-01 23:52:37,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:52:37,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:52:37,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:52:37,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:52:37,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:52:37,096 INFO L87 Difference]: Start difference. First operand 12184 states and 17633 transitions. Second operand has 7 states, 6 states have (on average 22.666666666666668) internal successors, (136), 4 states have internal predecessors, (136), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:52:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:52:48,958 INFO L93 Difference]: Finished difference Result 37596 states and 55301 transitions. [2023-04-01 23:52:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:52:48,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 22.666666666666668) internal successors, (136), 4 states have internal predecessors, (136), 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 142 [2023-04-01 23:52:48,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:52:49,048 INFO L225 Difference]: With dead ends: 37596 [2023-04-01 23:52:49,048 INFO L226 Difference]: Without dead ends: 25418 [2023-04-01 23:52:49,079 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 [2023-04-01 23:52:49,080 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 5859 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 11344 mSolverCounterSat, 2113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5859 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 13457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2113 IncrementalHoareTripleChecker+Valid, 11344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:52:49,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5859 Valid, 956 Invalid, 13457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2113 Valid, 11344 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2023-04-01 23:52:49,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25418 states. [2023-04-01 23:52:49,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25418 to 23097. [2023-04-01 23:52:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23097 states, 22383 states have (on average 1.280302014922039) internal successors, (28657), 22485 states have internal predecessors, (28657), 92 states have call successors, (92), 92 states have call predecessors, (92), 621 states have return successors, (1845), 519 states have call predecessors, (1845), 91 states have call successors, (1845) [2023-04-01 23:52:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23097 states to 23097 states and 30594 transitions. [2023-04-01 23:52:49,726 INFO L78 Accepts]: Start accepts. Automaton has 23097 states and 30594 transitions. Word has length 142 [2023-04-01 23:52:49,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:52:49,727 INFO L495 AbstractCegarLoop]: Abstraction has 23097 states and 30594 transitions. [2023-04-01 23:52:49,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 22.666666666666668) internal successors, (136), 4 states have internal predecessors, (136), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:52:49,728 INFO L276 IsEmpty]: Start isEmpty. Operand 23097 states and 30594 transitions. [2023-04-01 23:52:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 23:52:49,729 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:52:49,729 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:52:49,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 23:52:49,730 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:52:49,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:52:49,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1319134296, now seen corresponding path program 1 times [2023-04-01 23:52:49,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:52:49,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660020470] [2023-04-01 23:52:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:52:49,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:52:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:49,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:52:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:49,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:52:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:52:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:52:50,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:52:50,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660020470] [2023-04-01 23:52:50,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660020470] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:52:50,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:52:50,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:52:50,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497550311] [2023-04-01 23:52:50,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:52:50,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:52:50,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:52:50,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:52:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:52:50,071 INFO L87 Difference]: Start difference. First operand 23097 states and 30594 transitions. Second operand has 7 states, 6 states have (on average 23.833333333333332) internal successors, (143), 4 states have internal predecessors, (143), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:53:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:53:02,466 INFO L93 Difference]: Finished difference Result 71609 states and 98293 transitions. [2023-04-01 23:53:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:53:02,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 23.833333333333332) internal successors, (143), 4 states have internal predecessors, (143), 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 149 [2023-04-01 23:53:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:53:02,624 INFO L225 Difference]: With dead ends: 71609 [2023-04-01 23:53:02,624 INFO L226 Difference]: Without dead ends: 48518 [2023-04-01 23:53:02,673 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 [2023-04-01 23:53:02,674 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 8120 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 11711 mSolverCounterSat, 2090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8120 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 13801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2090 IncrementalHoareTripleChecker+Valid, 11711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:53:02,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8120 Valid, 1047 Invalid, 13801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2090 Valid, 11711 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2023-04-01 23:53:02,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48518 states. [2023-04-01 23:53:03,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48518 to 45399. [2023-04-01 23:53:03,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45399 states, 43518 states have (on average 1.1893469368996736) internal successors, (51758), 43847 states have internal predecessors, (51758), 176 states have call successors, (176), 176 states have call predecessors, (176), 1704 states have return successors, (6069), 1375 states have call predecessors, (6069), 175 states have call successors, (6069) [2023-04-01 23:53:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45399 states to 45399 states and 58003 transitions. [2023-04-01 23:53:03,744 INFO L78 Accepts]: Start accepts. Automaton has 45399 states and 58003 transitions. Word has length 149 [2023-04-01 23:53:03,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:53:03,745 INFO L495 AbstractCegarLoop]: Abstraction has 45399 states and 58003 transitions. [2023-04-01 23:53:03,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 23.833333333333332) internal successors, (143), 4 states have internal predecessors, (143), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:53:03,745 INFO L276 IsEmpty]: Start isEmpty. Operand 45399 states and 58003 transitions. [2023-04-01 23:53:03,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 713 [2023-04-01 23:53:03,759 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:53:03,760 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:53:03,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 23:53:03,761 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:53:03,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:53:03,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1512694132, now seen corresponding path program 1 times [2023-04-01 23:53:03,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:53:03,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446039719] [2023-04-01 23:53:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:53:03,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:53:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:04,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:53:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:04,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:53:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:04,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:53:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:05,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:53:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:05,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 601 [2023-04-01 23:53:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 23:53:05,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:53:05,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446039719] [2023-04-01 23:53:05,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446039719] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:53:05,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59392602] [2023-04-01 23:53:05,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:53:05,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:53:05,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:53:05,224 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:53:05,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 23:53:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:05,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:53:05,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:53:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:53:05,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:53:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:53:06,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59392602] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:53:06,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:53:06,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:53:06,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608553418] [2023-04-01 23:53:06,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:53:06,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:53:06,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:53:06,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:53:06,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:53:06,094 INFO L87 Difference]: Start difference. First operand 45399 states and 58003 transitions. Second operand has 11 states, 11 states have (on average 78.0909090909091) internal successors, (859), 9 states have internal predecessors, (859), 4 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 23:53:25,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:53:25,531 INFO L93 Difference]: Finished difference Result 173882 states and 245278 transitions. [2023-04-01 23:53:25,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 23:53:25,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 78.0909090909091) internal successors, (859), 9 states have internal predecessors, (859), 4 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 712 [2023-04-01 23:53:25,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:53:26,337 INFO L225 Difference]: With dead ends: 173882 [2023-04-01 23:53:26,337 INFO L226 Difference]: Without dead ends: 128489 [2023-04-01 23:53:26,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1460 GetRequests, 1434 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:53:26,422 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 8114 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 19021 mSolverCounterSat, 4634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8114 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 23655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4634 IncrementalHoareTripleChecker+Valid, 19021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:53:26,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8114 Valid, 1586 Invalid, 23655 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4634 Valid, 19021 Invalid, 0 Unknown, 0 Unchecked, 17.5s Time] [2023-04-01 23:53:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128489 states. [2023-04-01 23:53:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128489 to 123431. [2023-04-01 23:53:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123431 states, 118361 states have (on average 1.1383056919086523) internal successors, (134731), 119355 states have internal predecessors, (134731), 482 states have call successors, (482), 482 states have call predecessors, (482), 4587 states have return successors, (23922), 3593 states have call predecessors, (23922), 481 states have call successors, (23922) [2023-04-01 23:53:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123431 states to 123431 states and 159135 transitions. [2023-04-01 23:53:29,690 INFO L78 Accepts]: Start accepts. Automaton has 123431 states and 159135 transitions. Word has length 712 [2023-04-01 23:53:29,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:53:29,691 INFO L495 AbstractCegarLoop]: Abstraction has 123431 states and 159135 transitions. [2023-04-01 23:53:29,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 78.0909090909091) internal successors, (859), 9 states have internal predecessors, (859), 4 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 23:53:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 123431 states and 159135 transitions. [2023-04-01 23:53:29,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 917 [2023-04-01 23:53:29,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:53:29,720 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:53:29,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 23:53:29,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 23:53:29,929 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:53:29,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:53:29,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1223785718, now seen corresponding path program 1 times [2023-04-01 23:53:29,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:53:29,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173050220] [2023-04-01 23:53:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:53:29,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:53:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:30,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:53:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:30,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:53:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:30,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:53:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:31,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-01 23:53:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:31,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-04-01 23:53:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 429 proven. 2 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2023-04-01 23:53:31,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:53:31,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173050220] [2023-04-01 23:53:31,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173050220] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:53:31,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824163563] [2023-04-01 23:53:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:53:31,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:53:31,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:53:31,350 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:53:31,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 23:53:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:53:31,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:53:31,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:53:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 431 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2023-04-01 23:53:31,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:53:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 431 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2023-04-01 23:53:32,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824163563] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:53:32,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:53:32,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:53:32,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354342559] [2023-04-01 23:53:32,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:53:32,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:53:32,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:53:32,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:53:32,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:53:32,443 INFO L87 Difference]: Start difference. First operand 123431 states and 159135 transitions. Second operand has 12 states, 12 states have (on average 85.58333333333333) internal successors, (1027), 10 states have internal predecessors, (1027), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 23:53:55,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:53:55,455 INFO L93 Difference]: Finished difference Result 331039 states and 454634 transitions. [2023-04-01 23:53:55,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 23:53:55,456 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 85.58333333333333) internal successors, (1027), 10 states have internal predecessors, (1027), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 916 [2023-04-01 23:53:55,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:53:56,735 INFO L225 Difference]: With dead ends: 331039 [2023-04-01 23:53:56,736 INFO L226 Difference]: Without dead ends: 207614 [2023-04-01 23:53:56,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1874 GetRequests, 1849 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:53:56,905 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 14099 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 25287 mSolverCounterSat, 7762 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14099 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 33049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7762 IncrementalHoareTripleChecker+Valid, 25287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:53:56,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14099 Valid, 1609 Invalid, 33049 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7762 Valid, 25287 Invalid, 0 Unknown, 0 Unchecked, 20.2s Time] [2023-04-01 23:53:57,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207614 states. [2023-04-01 23:54:00,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207614 to 199792. [2023-04-01 23:54:00,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199792 states, 192626 states have (on average 1.1385119350451134) internal successors, (219307), 194056 states have internal predecessors, (219307), 794 states have call successors, (794), 794 states have call predecessors, (794), 6371 states have return successors, (46980), 4941 states have call predecessors, (46980), 793 states have call successors, (46980) [2023-04-01 23:54:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199792 states to 199792 states and 267081 transitions. [2023-04-01 23:54:01,685 INFO L78 Accepts]: Start accepts. Automaton has 199792 states and 267081 transitions. Word has length 916 [2023-04-01 23:54:01,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:54:01,686 INFO L495 AbstractCegarLoop]: Abstraction has 199792 states and 267081 transitions. [2023-04-01 23:54:01,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 85.58333333333333) internal successors, (1027), 10 states have internal predecessors, (1027), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 23:54:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 199792 states and 267081 transitions. [2023-04-01 23:54:01,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 960 [2023-04-01 23:54:01,725 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:54:01,726 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:54:01,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 23:54:01,933 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,SelfDestructingSolverStorable6 [2023-04-01 23:54:01,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:54:01,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:54:01,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1718866817, now seen corresponding path program 1 times [2023-04-01 23:54:01,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:54:01,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713851594] [2023-04-01 23:54:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:01,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:54:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:02,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:54:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:02,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:54:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:02,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2023-04-01 23:54:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:03,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:54:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:03,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:54:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:03,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 845 [2023-04-01 23:54:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 263 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-04-01 23:54:03,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:54:03,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713851594] [2023-04-01 23:54:03,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713851594] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:54:03,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184642814] [2023-04-01 23:54:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:03,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:54:03,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:54:03,573 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:54:03,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 23:54:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:03,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:54:03,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:54:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-04-01 23:54:04,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:54:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-04-01 23:54:04,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184642814] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:54:04,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:54:04,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:54:04,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851671804] [2023-04-01 23:54:04,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:54:04,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:54:04,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:54:04,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:54:04,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:54:04,372 INFO L87 Difference]: Start difference. First operand 199792 states and 267081 transitions. Second operand has 12 states, 12 states have (on average 76.0) internal successors, (912), 10 states have internal predecessors, (912), 5 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 23:54:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:54:25,866 INFO L93 Difference]: Finished difference Result 459884 states and 623054 transitions. [2023-04-01 23:54:25,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 23:54:25,867 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 76.0) internal successors, (912), 10 states have internal predecessors, (912), 5 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 959 [2023-04-01 23:54:25,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:54:26,932 INFO L225 Difference]: With dead ends: 459884 [2023-04-01 23:54:26,933 INFO L226 Difference]: Without dead ends: 251061 [2023-04-01 23:54:27,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1965 GetRequests, 1939 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2023-04-01 23:54:27,136 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 8675 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 27362 mSolverCounterSat, 3614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8692 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 30976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3614 IncrementalHoareTripleChecker+Valid, 27362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:54:27,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8692 Valid, 1483 Invalid, 30976 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3614 Valid, 27362 Invalid, 0 Unknown, 0 Unchecked, 17.8s Time] [2023-04-01 23:54:27,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251061 states. [2023-04-01 23:54:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251061 to 246112. [2023-04-01 23:54:31,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246112 states, 237936 states have (on average 1.079723118821868) internal successors, (256905), 239494 states have internal predecessors, (256905), 1117 states have call successors, (1117), 986 states have call predecessors, (1117), 7058 states have return successors, (45042), 5631 states have call predecessors, (45042), 1116 states have call successors, (45042) [2023-04-01 23:54:32,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246112 states to 246112 states and 303064 transitions. [2023-04-01 23:54:32,172 INFO L78 Accepts]: Start accepts. Automaton has 246112 states and 303064 transitions. Word has length 959 [2023-04-01 23:54:32,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:54:32,173 INFO L495 AbstractCegarLoop]: Abstraction has 246112 states and 303064 transitions. [2023-04-01 23:54:32,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 76.0) internal successors, (912), 10 states have internal predecessors, (912), 5 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 23:54:32,173 INFO L276 IsEmpty]: Start isEmpty. Operand 246112 states and 303064 transitions. [2023-04-01 23:54:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1103 [2023-04-01 23:54:32,475 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:54:32,475 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:54:32,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 23:54:32,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:54:32,683 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:54:32,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:54:32,683 INFO L85 PathProgramCache]: Analyzing trace with hash 87573202, now seen corresponding path program 1 times [2023-04-01 23:54:32,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:54:32,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829145150] [2023-04-01 23:54:32,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:32,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:54:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:33,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:54:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:33,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:54:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:33,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:54:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:33,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-01 23:54:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:33,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-04-01 23:54:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:33,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 808 [2023-04-01 23:54:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:33,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 934 [2023-04-01 23:54:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1382 backedges. 177 proven. 5 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-04-01 23:54:33,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:54:33,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829145150] [2023-04-01 23:54:33,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829145150] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:54:33,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404946943] [2023-04-01 23:54:33,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:54:33,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:54:33,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:54:33,905 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:54:33,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 23:54:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:54:34,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:54:34,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:54:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1382 backedges. 975 proven. 2 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2023-04-01 23:54:34,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:54:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1382 backedges. 365 proven. 176 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2023-04-01 23:54:34,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404946943] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:54:34,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:54:34,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2023-04-01 23:54:34,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116361891] [2023-04-01 23:54:34,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:54:34,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:54:34,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:54:34,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:54:34,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:54:34,794 INFO L87 Difference]: Start difference. First operand 246112 states and 303064 transitions. Second operand has 12 states, 12 states have (on average 71.66666666666667) internal successors, (860), 10 states have internal predecessors, (860), 5 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10)