/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_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:54:59,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:54:59,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:54:59,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 23:54:59,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 23:54:59,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 23:54:59,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 23:54:59,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 23:54:59,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 23:54:59,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 23:54:59,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 23:54:59,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 23:54:59,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 23:54:59,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 23:54:59,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 23:54:59,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 23:54:59,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 23:54:59,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 23:54:59,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 23:54:59,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 23:54:59,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 23:54:59,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 23:54:59,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 23:54:59,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 23:54:59,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 23:54:59,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:54:59,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:54:59,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:54:59,308 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 23:54:59,327 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:54:59,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:54:59,328 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:54:59,328 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:54:59,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:54:59,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:54:59,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:54:59,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:54:59,329 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:54:59,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:54:59,329 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:54:59,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:54:59,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:54:59,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:54:59,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:54:59,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:54:59,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:54:59,330 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:54:59,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:54:59,330 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:54:59,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:54:59,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:54:59,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:54:59,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:54:59,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:54:59,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:54:59,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:54:59,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:54:59,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:54:59,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:54:59,331 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:54:59,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:54:59,331 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:54:59,331 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:54:59,331 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:54:59,331 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:54:59,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:54:59,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:54:59,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:54:59,490 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:54:59,491 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:54:59,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label26.c [2023-04-01 23:55:00,509 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:55:00,899 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:55:00,900 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label26.c [2023-04-01 23:55:00,935 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24c9ec2f2/da7ecf4a71944c7fa5161c35d58f627c/FLAG134f8fe2a [2023-04-01 23:55:00,948 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24c9ec2f2/da7ecf4a71944c7fa5161c35d58f627c [2023-04-01 23:55:00,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:55:00,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:55:00,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:55:00,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:55:00,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:55:00,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:55:00" (1/1) ... [2023-04-01 23:55:00,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f324fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:55:00, skipping insertion in model container [2023-04-01 23:55:00,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:55:00" (1/1) ... [2023-04-01 23:55:00,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:55:01,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:55:01,313 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_label26.c[3735,3748] [2023-04-01 23:55:02,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:55:02,187 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:55:02,211 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_label26.c[3735,3748] [2023-04-01 23:55:02,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:55:02,753 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:55:02,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:55:02 WrapperNode [2023-04-01 23:55:02,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:55:02,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:55:02,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:55:02,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:55:02,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:55:02" (1/1) ... [2023-04-01 23:55:02,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:55:02" (1/1) ... [2023-04-01 23:55:02,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:55:02" (1/1) ... [2023-04-01 23:55:02,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:55:02" (1/1) ... [2023-04-01 23:55:03,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:55:02" (1/1) ... [2023-04-01 23:55:03,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:55:02" (1/1) ... [2023-04-01 23:55:03,065 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:55:02" (1/1) ... [2023-04-01 23:55:03,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:55:02" (1/1) ... [2023-04-01 23:55:03,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:55:03,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:55:03,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:55:03,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:55:03,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:55:02" (1/1) ... [2023-04-01 23:55:03,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:55:03,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:55:03,153 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 23:55:03,173 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 23:55:03,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:55:03,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:55:03,191 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:55:03,191 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:55:03,191 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:55:03,191 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 23:55:03,191 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 23:55:03,191 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 23:55:03,191 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 23:55:03,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:55:03,191 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:55:03,191 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:55:03,191 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 23:55:03,191 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 23:55:03,191 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 23:55:03,191 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 23:55:03,191 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:55:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:55:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:55:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:55:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:55:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:55:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:55:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:55:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:55:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:55:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:55:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:55:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:55:03,373 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:55:03,375 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:55:09,016 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:55:09,030 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:55:09,030 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:55:09,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:55:09 BoogieIcfgContainer [2023-04-01 23:55:09,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:55:09,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:55:09,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:55:09,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:55:09,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:55:00" (1/3) ... [2023-04-01 23:55:09,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1da8ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:55:09, skipping insertion in model container [2023-04-01 23:55:09,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:55:02" (2/3) ... [2023-04-01 23:55:09,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1da8ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:55:09, skipping insertion in model container [2023-04-01 23:55:09,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:55:09" (3/3) ... [2023-04-01 23:55:09,039 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label26.c [2023-04-01 23:55:09,050 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:55:09,051 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:55:09,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:55:09,110 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;@49e046a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:55:09,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:55:09,129 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 23:55:09,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 23:55:09,135 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:55:09,136 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] [2023-04-01 23:55:09,136 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:55:09,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:55:09,153 INFO L85 PathProgramCache]: Analyzing trace with hash 2005379764, now seen corresponding path program 1 times [2023-04-01 23:55:09,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:55:09,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725510944] [2023-04-01 23:55:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:55:09,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:55:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:09,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:55:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:09,551 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 23:55:09,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:55:09,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725510944] [2023-04-01 23:55:09,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725510944] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:55:09,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:55:09,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 23:55:09,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279308975] [2023-04-01 23:55:09,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:55:09,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 23:55:09,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:55:09,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 23:55:09,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 23:55:09,593 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 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 23:55:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:55:19,369 INFO L93 Difference]: Finished difference Result 5076 states and 9543 transitions. [2023-04-01 23:55:19,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:55:19,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 32 [2023-04-01 23:55:19,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:55:19,396 INFO L225 Difference]: With dead ends: 5076 [2023-04-01 23:55:19,397 INFO L226 Difference]: Without dead ends: 3219 [2023-04-01 23:55:19,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:55:19,412 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 4662 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 7327 mSolverCounterSat, 1544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4662 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 8871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1544 IncrementalHoareTripleChecker+Valid, 7327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:55:19,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4662 Valid, 384 Invalid, 8871 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1544 Valid, 7327 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2023-04-01 23:55:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2023-04-01 23:55:19,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3194. [2023-04-01 23:55:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 3154 states have (on average 1.592263792010146) internal successors, (5022), 3156 states have internal predecessors, (5022), 14 states have call successors, (14), 14 states have call predecessors, (14), 25 states have return successors, (37), 23 states have call predecessors, (37), 13 states have call successors, (37) [2023-04-01 23:55:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 5073 transitions. [2023-04-01 23:55:19,530 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 5073 transitions. Word has length 32 [2023-04-01 23:55:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:55:19,530 INFO L495 AbstractCegarLoop]: Abstraction has 3194 states and 5073 transitions. [2023-04-01 23:55:19,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 23:55:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 5073 transitions. [2023-04-01 23:55:19,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 23:55:19,580 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:55:19,580 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:55:19,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:55:19,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:55:19,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:55:19,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1838213187, now seen corresponding path program 1 times [2023-04-01 23:55:19,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:55:19,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198188747] [2023-04-01 23:55:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:55:19,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:55:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:19,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:55:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:19,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:55:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:55:19,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:55:19,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198188747] [2023-04-01 23:55:19,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198188747] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:55:19,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:55:19,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 23:55:19,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616152292] [2023-04-01 23:55:19,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:55:19,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:55:19,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:55:19,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:55:19,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:55:19,850 INFO L87 Difference]: Start difference. First operand 3194 states and 5073 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 5 states have internal predecessors, (97), 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 23:55:44,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:55:44,528 INFO L93 Difference]: Finished difference Result 20617 states and 33713 transitions. [2023-04-01 23:55:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 23:55:44,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 5 states have internal predecessors, (97), 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 103 [2023-04-01 23:55:44,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:55:44,587 INFO L225 Difference]: With dead ends: 20617 [2023-04-01 23:55:44,588 INFO L226 Difference]: Without dead ends: 17429 [2023-04-01 23:55:44,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:55:44,602 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 11623 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 28036 mSolverCounterSat, 3776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11623 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 31812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3776 IncrementalHoareTripleChecker+Valid, 28036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:55:44,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11623 Valid, 1043 Invalid, 31812 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3776 Valid, 28036 Invalid, 0 Unknown, 0 Unchecked, 23.8s Time] [2023-04-01 23:55:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17429 states. [2023-04-01 23:55:44,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17429 to 17373. [2023-04-01 23:55:44,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17373 states, 17154 states have (on average 1.3166025416812406) internal successors, (22585), 17166 states have internal predecessors, (22585), 74 states have call successors, (74), 74 states have call predecessors, (74), 144 states have return successors, (810), 132 states have call predecessors, (810), 73 states have call successors, (810) [2023-04-01 23:55:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17373 states to 17373 states and 23469 transitions. [2023-04-01 23:55:44,957 INFO L78 Accepts]: Start accepts. Automaton has 17373 states and 23469 transitions. Word has length 103 [2023-04-01 23:55:44,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:55:44,957 INFO L495 AbstractCegarLoop]: Abstraction has 17373 states and 23469 transitions. [2023-04-01 23:55:44,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 5 states have internal predecessors, (97), 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 23:55:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 17373 states and 23469 transitions. [2023-04-01 23:55:44,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-01 23:55:44,964 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:55:44,965 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:55:44,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:55:44,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:55:44,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:55:44,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1292575461, now seen corresponding path program 1 times [2023-04-01 23:55:44,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:55:44,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111793921] [2023-04-01 23:55:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:55:44,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:55:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:45,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:55:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:45,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:55:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:55:45,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:55:45,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111793921] [2023-04-01 23:55:45,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111793921] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:55:45,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:55:45,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:55:45,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244781926] [2023-04-01 23:55:45,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:55:45,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:55:45,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:55:45,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:55:45,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:55:45,339 INFO L87 Difference]: Start difference. First operand 17373 states and 23469 transitions. Second operand has 7 states, 6 states have (on average 21.166666666666668) internal successors, (127), 4 states have internal predecessors, (127), 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 23:55:56,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:55:56,126 INFO L93 Difference]: Finished difference Result 51229 states and 72277 transitions. [2023-04-01 23:55:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:55:56,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 21.166666666666668) internal successors, (127), 4 states have internal predecessors, (127), 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 133 [2023-04-01 23:55:56,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:55:56,225 INFO L225 Difference]: With dead ends: 51229 [2023-04-01 23:55:56,225 INFO L226 Difference]: Without dead ends: 33862 [2023-04-01 23:55:56,261 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 23:55:56,264 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 8899 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 10631 mSolverCounterSat, 2137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8899 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 12768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2137 IncrementalHoareTripleChecker+Valid, 10631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:55:56,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8899 Valid, 1102 Invalid, 12768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2137 Valid, 10631 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2023-04-01 23:55:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33862 states. [2023-04-01 23:55:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33862 to 33708. [2023-04-01 23:55:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33708 states, 33057 states have (on average 1.2129352330822518) internal successors, (40096), 33128 states have internal predecessors, (40096), 140 states have call successors, (140), 140 states have call predecessors, (140), 510 states have return successors, (3490), 439 states have call predecessors, (3490), 139 states have call successors, (3490) [2023-04-01 23:55:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33708 states to 33708 states and 43726 transitions. [2023-04-01 23:55:56,986 INFO L78 Accepts]: Start accepts. Automaton has 33708 states and 43726 transitions. Word has length 133 [2023-04-01 23:55:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:55:56,987 INFO L495 AbstractCegarLoop]: Abstraction has 33708 states and 43726 transitions. [2023-04-01 23:55:56,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 21.166666666666668) internal successors, (127), 4 states have internal predecessors, (127), 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 23:55:56,988 INFO L276 IsEmpty]: Start isEmpty. Operand 33708 states and 43726 transitions. [2023-04-01 23:55:56,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-04-01 23:55:56,992 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:55:56,993 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:55:56,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:55:56,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:55:56,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:55:56,993 INFO L85 PathProgramCache]: Analyzing trace with hash 80020030, now seen corresponding path program 1 times [2023-04-01 23:55:56,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:55:56,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041749184] [2023-04-01 23:55:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:55:56,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:55:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:57,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:55:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:57,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:55:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:57,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-04-01 23:55:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 50 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 23:55:57,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:55:57,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041749184] [2023-04-01 23:55:57,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041749184] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:55:57,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315097172] [2023-04-01 23:55:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:55:57,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:55:57,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:55:57,354 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 23:55:57,355 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 23:55:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:55:57,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 23:55:57,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:55:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 23:55:57,668 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:55:57,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315097172] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:55:57,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:55:57,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-04-01 23:55:57,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52021234] [2023-04-01 23:55:57,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:55:57,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:55:57,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:55:57,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:55:57,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:55:57,671 INFO L87 Difference]: Start difference. First operand 33708 states and 43726 transitions. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 4 states have internal predecessors, (195), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:56:06,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:56:06,082 INFO L93 Difference]: Finished difference Result 101284 states and 135130 transitions. [2023-04-01 23:56:06,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 23:56:06,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 4 states have internal predecessors, (195), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 227 [2023-04-01 23:56:06,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:56:06,272 INFO L225 Difference]: With dead ends: 101284 [2023-04-01 23:56:06,272 INFO L226 Difference]: Without dead ends: 67582 [2023-04-01 23:56:06,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:56:06,324 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 7865 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 8317 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7865 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 9217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 8317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:56:06,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7865 Valid, 993 Invalid, 9217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [900 Valid, 8317 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-04-01 23:56:06,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67582 states. [2023-04-01 23:56:07,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67582 to 59046. [2023-04-01 23:56:07,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59046 states, 57641 states have (on average 1.2045766034593433) internal successors, (69433), 57833 states have internal predecessors, (69433), 242 states have call successors, (242), 242 states have call predecessors, (242), 1162 states have return successors, (7722), 970 states have call predecessors, (7722), 241 states have call successors, (7722) [2023-04-01 23:56:07,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59046 states to 59046 states and 77397 transitions. [2023-04-01 23:56:07,565 INFO L78 Accepts]: Start accepts. Automaton has 59046 states and 77397 transitions. Word has length 227 [2023-04-01 23:56:07,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:56:07,566 INFO L495 AbstractCegarLoop]: Abstraction has 59046 states and 77397 transitions. [2023-04-01 23:56:07,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 4 states have internal predecessors, (195), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:56:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 59046 states and 77397 transitions. [2023-04-01 23:56:07,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2023-04-01 23:56:07,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:56:07,571 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:56:07,578 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 23:56:07,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:56:07,778 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:56:07,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:56:07,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1337825769, now seen corresponding path program 1 times [2023-04-01 23:56:07,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:56:07,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315345341] [2023-04-01 23:56:07,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:56:07,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:56:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:08,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:56:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:08,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:56:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:08,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2023-04-01 23:56:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 23:56:08,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:56:08,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315345341] [2023-04-01 23:56:08,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315345341] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:56:08,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429090772] [2023-04-01 23:56:08,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:56:08,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:56:08,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:56:08,430 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 23:56:08,431 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 23:56:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:08,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:56:08,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:56:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 212 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:56:08,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:56:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 212 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:56:09,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429090772] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:56:09,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:56:09,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:56:09,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111091438] [2023-04-01 23:56:09,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:56:09,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:56:09,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:56:09,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:56:09,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:56:09,143 INFO L87 Difference]: Start difference. First operand 59046 states and 77397 transitions. Second operand has 12 states, 12 states have (on average 60.666666666666664) internal successors, (728), 10 states have internal predecessors, (728), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:56:26,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:56:26,375 INFO L93 Difference]: Finished difference Result 181438 states and 260314 transitions. [2023-04-01 23:56:26,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 23:56:26,376 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 60.666666666666664) internal successors, (728), 10 states have internal predecessors, (728), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 407 [2023-04-01 23:56:26,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:56:26,778 INFO L225 Difference]: With dead ends: 181438 [2023-04-01 23:56:26,778 INFO L226 Difference]: Without dead ends: 122398 [2023-04-01 23:56:26,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 837 GetRequests, 816 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2023-04-01 23:56:26,963 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 10936 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 18777 mSolverCounterSat, 7338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10936 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 26115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7338 IncrementalHoareTripleChecker+Valid, 18777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:56:26,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10936 Valid, 1239 Invalid, 26115 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7338 Valid, 18777 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time] [2023-04-01 23:56:27,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122398 states. [2023-04-01 23:56:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122398 to 119062. [2023-04-01 23:56:29,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119062 states, 115591 states have (on average 1.2003962246195639) internal successors, (138755), 116176 states have internal predecessors, (138755), 482 states have call successors, (482), 482 states have call predecessors, (482), 2988 states have return successors, (27203), 2403 states have call predecessors, (27203), 481 states have call successors, (27203) [2023-04-01 23:56:30,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119062 states to 119062 states and 166440 transitions. [2023-04-01 23:56:30,129 INFO L78 Accepts]: Start accepts. Automaton has 119062 states and 166440 transitions. Word has length 407 [2023-04-01 23:56:30,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:56:30,130 INFO L495 AbstractCegarLoop]: Abstraction has 119062 states and 166440 transitions. [2023-04-01 23:56:30,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 60.666666666666664) internal successors, (728), 10 states have internal predecessors, (728), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:56:30,130 INFO L276 IsEmpty]: Start isEmpty. Operand 119062 states and 166440 transitions. [2023-04-01 23:56:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2023-04-01 23:56:30,139 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:56:30,139 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 23:56:30,144 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 23:56:30,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:56:30,344 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:56:30,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:56:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash -785307610, now seen corresponding path program 1 times [2023-04-01 23:56:30,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:56:30,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766429594] [2023-04-01 23:56:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:56:30,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:56:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:30,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:56:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:30,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:56:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:30,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2023-04-01 23:56:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:31,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2023-04-01 23:56:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 402 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-04-01 23:56:31,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:56:31,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766429594] [2023-04-01 23:56:31,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766429594] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:56:31,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960711750] [2023-04-01 23:56:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:56:31,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:56:31,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:56:31,203 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 23:56:31,204 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 23:56:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:31,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:56:31,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:56:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 404 proven. 2 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-04-01 23:56:31,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:56:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 404 proven. 2 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-04-01 23:56:32,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960711750] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:56:32,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:56:32,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:56:32,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856030581] [2023-04-01 23:56:32,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:56:32,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:56:32,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:56:32,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:56:32,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:56:32,068 INFO L87 Difference]: Start difference. First operand 119062 states and 166440 transitions. Second operand has 12 states, 12 states have (on average 61.916666666666664) internal successors, (743), 10 states have internal predecessors, (743), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:56:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:56:54,123 INFO L93 Difference]: Finished difference Result 332832 states and 487108 transitions. [2023-04-01 23:56:54,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 23:56:54,124 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 61.916666666666664) internal successors, (743), 10 states have internal predecessors, (743), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 630 [2023-04-01 23:56:54,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:56:55,020 INFO L225 Difference]: With dead ends: 332832 [2023-04-01 23:56:55,020 INFO L226 Difference]: Without dead ends: 202095 [2023-04-01 23:56:55,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1297 GetRequests, 1273 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2023-04-01 23:56:55,277 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 8911 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 31209 mSolverCounterSat, 4874 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8911 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 36083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4874 IncrementalHoareTripleChecker+Valid, 31209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:56:55,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8911 Valid, 1513 Invalid, 36083 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4874 Valid, 31209 Invalid, 0 Unknown, 0 Unchecked, 19.0s Time] [2023-04-01 23:56:55,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202095 states. [2023-04-01 23:56:58,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202095 to 191397. [2023-04-01 23:56:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191397 states, 185753 states have (on average 1.0990455066674563) internal successors, (204151), 186782 states have internal predecessors, (204151), 776 states have call successors, (776), 776 states have call predecessors, (776), 4867 states have return successors, (31545), 3838 states have call predecessors, (31545), 775 states have call successors, (31545) [2023-04-01 23:56:59,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191397 states to 191397 states and 236472 transitions. [2023-04-01 23:56:59,094 INFO L78 Accepts]: Start accepts. Automaton has 191397 states and 236472 transitions. Word has length 630 [2023-04-01 23:56:59,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:56:59,095 INFO L495 AbstractCegarLoop]: Abstraction has 191397 states and 236472 transitions. [2023-04-01 23:56:59,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 61.916666666666664) internal successors, (743), 10 states have internal predecessors, (743), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:56:59,095 INFO L276 IsEmpty]: Start isEmpty. Operand 191397 states and 236472 transitions. [2023-04-01 23:56:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 977 [2023-04-01 23:56:59,117 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:56:59,119 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:59,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 23:56:59,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:56:59,327 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:56:59,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:56:59,328 INFO L85 PathProgramCache]: Analyzing trace with hash 185530147, now seen corresponding path program 1 times [2023-04-01 23:56:59,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:56:59,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207359278] [2023-04-01 23:56:59,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:56:59,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:56:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:59,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:56:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:56:59,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:57:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:00,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:57:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:00,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:57:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:00,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 601 [2023-04-01 23:57:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:00,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 838 [2023-04-01 23:57:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 302 proven. 2 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-04-01 23:57:00,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:57:00,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207359278] [2023-04-01 23:57:00,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207359278] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:57:00,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090194613] [2023-04-01 23:57:00,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:00,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:57:00,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:57:00,447 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 23:57:00,449 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 23:57:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:00,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:57:00,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:57:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 304 proven. 2 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-04-01 23:57:00,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:57:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 304 proven. 2 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-04-01 23:57:01,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090194613] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:57:01,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:57:01,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-04-01 23:57:01,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614336899] [2023-04-01 23:57:01,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:57:01,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 23:57:01,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:57:01,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 23:57:01,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:57:01,229 INFO L87 Difference]: Start difference. First operand 191397 states and 236472 transitions. Second operand has 13 states, 13 states have (on average 74.0) internal successors, (962), 11 states have internal predecessors, (962), 5 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 23:57:26,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:57:26,442 INFO L93 Difference]: Finished difference Result 554879 states and 710765 transitions. [2023-04-01 23:57:26,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 23:57:26,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 74.0) internal successors, (962), 11 states have internal predecessors, (962), 5 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 976 [2023-04-01 23:57:26,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:57:27,790 INFO L225 Difference]: With dead ends: 554879 [2023-04-01 23:57:27,790 INFO L226 Difference]: Without dead ends: 364876 [2023-04-01 23:57:27,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1995 GetRequests, 1970 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2023-04-01 23:57:27,988 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 12260 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 30259 mSolverCounterSat, 5259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12262 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 35518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5259 IncrementalHoareTripleChecker+Valid, 30259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:57:27,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12262 Valid, 1751 Invalid, 35518 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5259 Valid, 30259 Invalid, 0 Unknown, 0 Unchecked, 21.3s Time] [2023-04-01 23:57:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364876 states. [2023-04-01 23:57:32,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364876 to 360118. [2023-04-01 23:57:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360118 states, 349525 states have (on average 1.081144410271082) internal successors, (377887), 351465 states have internal predecessors, (377887), 1624 states have call successors, (1624), 1460 states have call predecessors, (1624), 8968 states have return successors, (65953), 7192 states have call predecessors, (65953), 1623 states have call successors, (65953) [2023-04-01 23:57:34,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360118 states to 360118 states and 445464 transitions. [2023-04-01 23:57:34,363 INFO L78 Accepts]: Start accepts. Automaton has 360118 states and 445464 transitions. Word has length 976 [2023-04-01 23:57:34,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:57:34,364 INFO L495 AbstractCegarLoop]: Abstraction has 360118 states and 445464 transitions. [2023-04-01 23:57:34,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 74.0) internal successors, (962), 11 states have internal predecessors, (962), 5 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 23:57:34,364 INFO L276 IsEmpty]: Start isEmpty. Operand 360118 states and 445464 transitions. [2023-04-01 23:57:34,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2023-04-01 23:57:34,383 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:57:34,384 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:57:34,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 23:57:34,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:57:34,589 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:57:34,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:57:34,590 INFO L85 PathProgramCache]: Analyzing trace with hash 301384047, now seen corresponding path program 1 times [2023-04-01 23:57:34,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:57:34,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679865281] [2023-04-01 23:57:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:34,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:57:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:35,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:57:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:35,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:57:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:35,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:57:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:35,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:57:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:35,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 601 [2023-04-01 23:57:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:35,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 835 [2023-04-01 23:57:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 310 proven. 163 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2023-04-01 23:57:36,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:57:36,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679865281] [2023-04-01 23:57:36,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679865281] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:57:36,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946957246] [2023-04-01 23:57:36,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:57:36,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:57:36,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:57:36,083 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:57:36,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 23:57:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:57:36,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 1350 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:57:36,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:57:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 609 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 23:57:36,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:57:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 311 proven. 164 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-04-01 23:57:37,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946957246] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:57:37,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:57:37,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:57:37,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780903873] [2023-04-01 23:57:37,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:57:37,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:57:37,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:57:37,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:57:37,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:57:37,247 INFO L87 Difference]: Start difference. First operand 360118 states and 445464 transitions. Second operand has 11 states, 11 states have (on average 132.54545454545453) internal successors, (1458), 9 states have internal predecessors, (1458), 4 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 23:57:54,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:57:54,874 INFO L93 Difference]: Finished difference Result 777449 states and 959074 transitions. [2023-04-01 23:57:54,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 23:57:54,875 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 132.54545454545453) internal successors, (1458), 9 states have internal predecessors, (1458), 4 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 1023 [2023-04-01 23:57:54,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:57:56,257 INFO L225 Difference]: With dead ends: 777449 [2023-04-01 23:57:56,257 INFO L226 Difference]: Without dead ends: 418726 [2023-04-01 23:57:56,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2084 GetRequests, 2063 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-04-01 23:57:56,717 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 10027 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 22186 mSolverCounterSat, 3017 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10029 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 25203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3017 IncrementalHoareTripleChecker+Valid, 22186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:57:56,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10029 Valid, 1390 Invalid, 25203 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3017 Valid, 22186 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2023-04-01 23:57:57,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418726 states. [2023-04-01 23:58:02,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418726 to 418257. [2023-04-01 23:58:03,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418257 states, 406265 states have (on average 1.0691691383702755) internal successors, (434366), 408447 states have internal predecessors, (434366), 1858 states have call successors, (1858), 1700 states have call predecessors, (1858), 10133 states have return successors, (64692), 8109 states have call predecessors, (64692), 1857 states have call successors, (64692) [2023-04-01 23:58:04,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418257 states to 418257 states and 500916 transitions. [2023-04-01 23:58:04,495 INFO L78 Accepts]: Start accepts. Automaton has 418257 states and 500916 transitions. Word has length 1023 [2023-04-01 23:58:04,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:58:04,496 INFO L495 AbstractCegarLoop]: Abstraction has 418257 states and 500916 transitions. [2023-04-01 23:58:04,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 132.54545454545453) internal successors, (1458), 9 states have internal predecessors, (1458), 4 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 23:58:04,496 INFO L276 IsEmpty]: Start isEmpty. Operand 418257 states and 500916 transitions. [2023-04-01 23:58:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1088 [2023-04-01 23:58:04,515 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:58:04,515 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:04,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 23:58:04,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:58:04,721 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:58:04,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:58:04,722 INFO L85 PathProgramCache]: Analyzing trace with hash -421747652, now seen corresponding path program 1 times [2023-04-01 23:58:04,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:58:04,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446875348] [2023-04-01 23:58:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:58:04,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:58:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:05,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:58:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:05,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:58:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:05,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2023-04-01 23:58:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:05,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:58:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:05,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:58:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:05,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 845 [2023-04-01 23:58:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 501 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-04-01 23:58:06,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:58:06,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446875348] [2023-04-01 23:58:06,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446875348] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:58:06,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071003581] [2023-04-01 23:58:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:58:06,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:58:06,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:58:06,084 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:58:06,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 23:58:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:06,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:58:06,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:58:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 503 proven. 2 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-04-01 23:58:06,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:58:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 503 proven. 2 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-04-01 23:58:07,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071003581] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:58:07,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:58:07,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:58:07,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249108863] [2023-04-01 23:58:07,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:58:07,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:58:07,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:58:07,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:58:07,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:58:07,124 INFO L87 Difference]: Start difference. First operand 418257 states and 500916 transitions. Second operand has 11 states, 11 states have (on average 118.45454545454545) internal successors, (1303), 9 states have internal predecessors, (1303), 4 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2023-04-01 23:58:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:58:25,006 INFO L93 Difference]: Finished difference Result 854734 states and 1028899 transitions. [2023-04-01 23:58:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 23:58:25,007 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 118.45454545454545) internal successors, (1303), 9 states have internal predecessors, (1303), 4 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 1087 [2023-04-01 23:58:25,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:58:26,528 INFO L225 Difference]: With dead ends: 854734 [2023-04-01 23:58:26,528 INFO L226 Difference]: Without dead ends: 439266 [2023-04-01 23:58:27,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2211 GetRequests, 2190 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-04-01 23:58:27,066 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 9771 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 20821 mSolverCounterSat, 3485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9774 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 24306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3485 IncrementalHoareTripleChecker+Valid, 20821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:58:27,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9774 Valid, 1275 Invalid, 24306 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3485 Valid, 20821 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2023-04-01 23:58:27,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439266 states. [2023-04-01 23:58:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439266 to 429866. [2023-04-01 23:58:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429866 states, 417093 states have (on average 1.0547144162093347) internal successors, (439914), 419462 states have internal predecessors, (439914), 1904 states have call successors, (1904), 1742 states have call predecessors, (1904), 10868 states have return successors, (55919), 8661 states have call predecessors, (55919), 1903 states have call successors, (55919) [2023-04-01 23:58:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429866 states to 429866 states and 497737 transitions. [2023-04-01 23:58:34,632 INFO L78 Accepts]: Start accepts. Automaton has 429866 states and 497737 transitions. Word has length 1087 [2023-04-01 23:58:34,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:58:34,633 INFO L495 AbstractCegarLoop]: Abstraction has 429866 states and 497737 transitions. [2023-04-01 23:58:34,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 118.45454545454545) internal successors, (1303), 9 states have internal predecessors, (1303), 4 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2023-04-01 23:58:34,634 INFO L276 IsEmpty]: Start isEmpty. Operand 429866 states and 497737 transitions. [2023-04-01 23:58:34,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1141 [2023-04-01 23:58:34,654 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:58:34,654 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:34,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 23:58:34,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:58:34,860 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:58:34,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:58:34,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1490889273, now seen corresponding path program 1 times [2023-04-01 23:58:34,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:58:34,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068588094] [2023-04-01 23:58:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:58:34,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:58:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:36,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:58:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:36,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:58:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:36,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:58:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:36,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2023-04-01 23:58:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:36,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-04-01 23:58:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:36,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 808 [2023-04-01 23:58:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:36,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 934 [2023-04-01 23:58:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 675 proven. 32 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2023-04-01 23:58:36,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:58:36,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068588094] [2023-04-01 23:58:36,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068588094] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:58:36,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908867573] [2023-04-01 23:58:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:58:36,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:58:36,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:58:36,573 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:58:36,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 23:58:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:58:36,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:58:36,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:58:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 1042 proven. 2 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2023-04-01 23:58:36,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:58:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 320 proven. 176 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2023-04-01 23:58:37,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908867573] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:58:37,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:58:37,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 16 [2023-04-01 23:58:37,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312076775] [2023-04-01 23:58:37,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:58:37,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 23:58:37,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:58:37,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 23:58:37,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-04-01 23:58:37,269 INFO L87 Difference]: Start difference. First operand 429866 states and 497737 transitions. Second operand has 16 states, 16 states have (on average 67.4375) internal successors, (1079), 14 states have internal predecessors, (1079), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11)