/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/Problem12_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:20:18,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:20:18,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:20:18,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:20:18,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:20:18,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:20:18,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:20:18,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:20:18,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:20:18,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:20:18,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:20:18,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:20:18,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:20:18,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:20:18,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:20:18,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:20:18,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:20:18,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:20:18,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:20:18,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:20:18,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:20:18,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:20:18,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:20:18,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:20:18,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:20:18,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:20:18,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:20:18,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:20:18,649 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:20:18,670 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:20:18,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:20:18,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:20:18,671 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:20:18,672 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:20:18,672 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:20:18,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:20:18,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:20:18,673 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:20:18,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:20:18,673 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:20:18,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:20:18,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:20:18,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:20:18,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:20:18,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:20:18,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:20:18,674 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:20:18,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:20:18,674 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:20:18,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:20:18,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:20:18,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:20:18,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:20:18,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:20:18,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:20:18,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:20:18,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:20:18,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:20:18,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:20:18,675 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:20:18,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:20:18,675 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:20:18,675 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:20:18,676 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:20:18,676 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:20:18,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:20:18,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:20:18,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:20:18,882 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:20:18,883 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:20:18,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label27.c [2023-03-30 23:20:19,907 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:20:20,225 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:20:20,226 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label27.c [2023-03-30 23:20:20,251 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/185edec9d/db66b948c5f64c0e964b58188842eb71/FLAG847f45997 [2023-03-30 23:20:20,265 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/185edec9d/db66b948c5f64c0e964b58188842eb71 [2023-03-30 23:20:20,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:20:20,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:20:20,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:20:20,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:20:20,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:20:20,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:20:20" (1/1) ... [2023-03-30 23:20:20,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@137deb28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:20, skipping insertion in model container [2023-03-30 23:20:20,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:20:20" (1/1) ... [2023-03-30 23:20:20,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:20:20,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:20:20,535 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/Problem12_label27.c[4120,4133] [2023-03-30 23:20:21,104 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:20:21,114 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:20:21,134 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/Problem12_label27.c[4120,4133] [2023-03-30 23:20:21,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:20:21,452 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:20:21,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:21 WrapperNode [2023-03-30 23:20:21,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:20:21,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:20:21,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:20:21,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:20:21,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:21" (1/1) ... [2023-03-30 23:20:21,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:21" (1/1) ... [2023-03-30 23:20:21,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:21" (1/1) ... [2023-03-30 23:20:21,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:21" (1/1) ... [2023-03-30 23:20:21,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:21" (1/1) ... [2023-03-30 23:20:21,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:21" (1/1) ... [2023-03-30 23:20:21,643 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:21" (1/1) ... [2023-03-30 23:20:21,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:21" (1/1) ... [2023-03-30 23:20:21,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:20:21,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:20:21,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:20:21,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:20:21,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:21" (1/1) ... [2023-03-30 23:20:21,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:20:21,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:20:21,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:20:21,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:20:21,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:20:21,721 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:20:21,722 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:20:21,722 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:20:21,722 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:20:21,722 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:20:21,722 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:20:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:20:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:20:21,722 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:20:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:20:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:20:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:20:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:20:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:20:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:20:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:20:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:20:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:20:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:20:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:20:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:20:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:20:21,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:20:21,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:20:21,872 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:20:21,875 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:20:25,173 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:20:25,182 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:20:25,182 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:20:25,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:20:25 BoogieIcfgContainer [2023-03-30 23:20:25,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:20:25,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:20:25,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:20:25,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:20:25,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:20:20" (1/3) ... [2023-03-30 23:20:25,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1725610c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:20:25, skipping insertion in model container [2023-03-30 23:20:25,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:20:21" (2/3) ... [2023-03-30 23:20:25,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1725610c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:20:25, skipping insertion in model container [2023-03-30 23:20:25,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:20:25" (3/3) ... [2023-03-30 23:20:25,189 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label27.c [2023-03-30 23:20:25,202 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:20:25,202 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:20:25,246 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:20:25,251 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;@7ac00d7c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:20:25,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:20:25,257 INFO L276 IsEmpty]: Start isEmpty. Operand has 839 states, 825 states have (on average 1.907878787878788) internal successors, (1574), 826 states have internal predecessors, (1574), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 23:20:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-03-30 23:20:25,263 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:20:25,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:20:25,264 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:20:25,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:20:25,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1726952464, now seen corresponding path program 1 times [2023-03-30 23:20:25,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:20:25,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427644489] [2023-03-30 23:20:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:20:25,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:20:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:25,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:20:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:20:25,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:20:25,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427644489] [2023-03-30 23:20:25,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427644489] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:20:25,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:20:25,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:20:25,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608096948] [2023-03-30 23:20:25,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:20:25,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:20:25,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:20:25,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:20:25,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:20:25,689 INFO L87 Difference]: Start difference. First operand has 839 states, 825 states have (on average 1.907878787878788) internal successors, (1574), 826 states have internal predecessors, (1574), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:20:30,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:20:30,079 INFO L93 Difference]: Finished difference Result 2487 states and 4748 transitions. [2023-03-30 23:20:30,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:20:30,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 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 37 [2023-03-30 23:20:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:20:30,097 INFO L225 Difference]: With dead ends: 2487 [2023-03-30 23:20:30,097 INFO L226 Difference]: Without dead ends: 1568 [2023-03-30 23:20:30,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:20:30,105 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2415 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3593 mSolverCounterSat, 716 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2415 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 4309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 716 IncrementalHoareTripleChecker+Valid, 3593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:20:30,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2415 Valid, 39 Invalid, 4309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [716 Valid, 3593 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-03-30 23:20:30,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2023-03-30 23:20:30,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1564. [2023-03-30 23:20:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1536 states have (on average 1.5944010416666667) internal successors, (2449), 1538 states have internal predecessors, (2449), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (25), 15 states have call predecessors, (25), 9 states have call successors, (25) [2023-03-30 23:20:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2484 transitions. [2023-03-30 23:20:30,196 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2484 transitions. Word has length 37 [2023-03-30 23:20:30,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:20:30,197 INFO L495 AbstractCegarLoop]: Abstraction has 1564 states and 2484 transitions. [2023-03-30 23:20:30,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:20:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2484 transitions. [2023-03-30 23:20:30,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-03-30 23:20:30,203 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:20:30,203 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:20:30,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:20:30,203 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:20:30,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:20:30,204 INFO L85 PathProgramCache]: Analyzing trace with hash 726871135, now seen corresponding path program 1 times [2023-03-30 23:20:30,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:20:30,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047753505] [2023-03-30 23:20:30,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:20:30,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:20:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:30,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:20:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:30,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:20:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:20:30,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:20:30,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047753505] [2023-03-30 23:20:30,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047753505] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:20:30,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:20:30,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:20:30,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088432456] [2023-03-30 23:20:30,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:20:30,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:20:30,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:20:30,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:20:30,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:20:30,634 INFO L87 Difference]: Start difference. First operand 1564 states and 2484 transitions. Second operand has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 4 states have internal predecessors, (110), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:20:35,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:20:35,935 INFO L93 Difference]: Finished difference Result 4768 states and 7606 transitions. [2023-03-30 23:20:35,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 23:20:35,936 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 4 states have internal predecessors, (110), 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 116 [2023-03-30 23:20:35,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:20:35,949 INFO L225 Difference]: With dead ends: 4768 [2023-03-30 23:20:35,950 INFO L226 Difference]: Without dead ends: 3210 [2023-03-30 23:20:35,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:20:35,959 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 4518 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 5718 mSolverCounterSat, 949 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4518 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 6667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 949 IncrementalHoareTripleChecker+Valid, 5718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:20:35,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4518 Valid, 112 Invalid, 6667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [949 Valid, 5718 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-03-30 23:20:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2023-03-30 23:20:36,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3163. [2023-03-30 23:20:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3095 states have (on average 1.4465266558966074) internal successors, (4477), 3104 states have internal predecessors, (4477), 18 states have call successors, (18), 18 states have call predecessors, (18), 49 states have return successors, (91), 40 states have call predecessors, (91), 17 states have call successors, (91) [2023-03-30 23:20:36,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 4586 transitions. [2023-03-30 23:20:36,045 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 4586 transitions. Word has length 116 [2023-03-30 23:20:36,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:20:36,046 INFO L495 AbstractCegarLoop]: Abstraction has 3163 states and 4586 transitions. [2023-03-30 23:20:36,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 4 states have internal predecessors, (110), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:20:36,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 4586 transitions. [2023-03-30 23:20:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-03-30 23:20:36,047 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:20:36,048 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:20:36,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:20:36,048 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:20:36,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:20:36,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1875721752, now seen corresponding path program 1 times [2023-03-30 23:20:36,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:20:36,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732434976] [2023-03-30 23:20:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:20:36,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:20:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:36,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:20:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:36,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:20:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:20:36,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:20:36,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732434976] [2023-03-30 23:20:36,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732434976] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:20:36,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:20:36,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:20:36,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662474124] [2023-03-30 23:20:36,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:20:36,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:20:36,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:20:36,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:20:36,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:20:36,338 INFO L87 Difference]: Start difference. First operand 3163 states and 4586 transitions. Second operand has 8 states, 7 states have (on average 19.857142857142858) internal successors, (139), 5 states have internal predecessors, (139), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:20:42,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:20:42,790 INFO L93 Difference]: Finished difference Result 12865 states and 19113 transitions. [2023-03-30 23:20:42,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:20:42,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 19.857142857142858) internal successors, (139), 5 states have internal predecessors, (139), 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 145 [2023-03-30 23:20:42,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:20:42,819 INFO L225 Difference]: With dead ends: 12865 [2023-03-30 23:20:42,819 INFO L226 Difference]: Without dead ends: 9708 [2023-03-30 23:20:42,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:20:42,827 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6074 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 6720 mSolverCounterSat, 2491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6074 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 9211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2491 IncrementalHoareTripleChecker+Valid, 6720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:20:42,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6074 Valid, 143 Invalid, 9211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2491 Valid, 6720 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-03-30 23:20:42,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9708 states. [2023-03-30 23:20:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9708 to 9631. [2023-03-30 23:20:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9631 states, 9375 states have (on average 1.30208) internal successors, (12207), 9424 states have internal predecessors, (12207), 50 states have call successors, (50), 50 states have call predecessors, (50), 205 states have return successors, (652), 156 states have call predecessors, (652), 49 states have call successors, (652) [2023-03-30 23:20:43,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9631 states to 9631 states and 12909 transitions. [2023-03-30 23:20:43,082 INFO L78 Accepts]: Start accepts. Automaton has 9631 states and 12909 transitions. Word has length 145 [2023-03-30 23:20:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:20:43,084 INFO L495 AbstractCegarLoop]: Abstraction has 9631 states and 12909 transitions. [2023-03-30 23:20:43,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 19.857142857142858) internal successors, (139), 5 states have internal predecessors, (139), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:20:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 9631 states and 12909 transitions. [2023-03-30 23:20:43,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-03-30 23:20:43,091 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:20:43,091 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:20:43,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:20:43,091 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:20:43,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:20:43,092 INFO L85 PathProgramCache]: Analyzing trace with hash 902959619, now seen corresponding path program 1 times [2023-03-30 23:20:43,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:20:43,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341199987] [2023-03-30 23:20:43,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:20:43,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:20:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:43,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:20:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:43,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:20:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:20:43,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:20:43,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341199987] [2023-03-30 23:20:43,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341199987] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:20:43,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413035108] [2023-03-30 23:20:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:20:43,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:20:43,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:20:43,338 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:20:43,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:20:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:43,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:20:43,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:20:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:20:43,557 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:20:43,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413035108] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:20:43,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:20:43,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:20:43,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194280845] [2023-03-30 23:20:43,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:20:43,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:20:43,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:20:43,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:20:43,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:20:43,559 INFO L87 Difference]: Start difference. First operand 9631 states and 12909 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:20:46,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:20:46,769 INFO L93 Difference]: Finished difference Result 28732 states and 39610 transitions. [2023-03-30 23:20:46,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:20:46,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 182 [2023-03-30 23:20:46,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:20:46,817 INFO L225 Difference]: With dead ends: 28732 [2023-03-30 23:20:46,818 INFO L226 Difference]: Without dead ends: 19107 [2023-03-30 23:20:46,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:20:46,834 INFO L413 NwaCegarLoop]: 1475 mSDtfsCounter, 735 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2844 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 1507 SdHoareTripleChecker+Invalid, 3220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 2844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:20:46,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 1507 Invalid, 3220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 2844 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-30 23:20:46,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19107 states. [2023-03-30 23:20:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19107 to 18340. [2023-03-30 23:20:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18340 states, 17893 states have (on average 1.2712792712233834) internal successors, (22747), 17979 states have internal predecessors, (22747), 94 states have call successors, (94), 94 states have call predecessors, (94), 352 states have return successors, (1882), 266 states have call predecessors, (1882), 93 states have call successors, (1882) [2023-03-30 23:20:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18340 states to 18340 states and 24723 transitions. [2023-03-30 23:20:47,148 INFO L78 Accepts]: Start accepts. Automaton has 18340 states and 24723 transitions. Word has length 182 [2023-03-30 23:20:47,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:20:47,149 INFO L495 AbstractCegarLoop]: Abstraction has 18340 states and 24723 transitions. [2023-03-30 23:20:47,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:20:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 18340 states and 24723 transitions. [2023-03-30 23:20:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-03-30 23:20:47,151 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:20:47,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:20:47,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:20:47,357 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 [2023-03-30 23:20:47,357 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:20:47,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:20:47,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1091022264, now seen corresponding path program 1 times [2023-03-30 23:20:47,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:20:47,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382113474] [2023-03-30 23:20:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:20:47,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:20:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:47,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:20:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:47,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:20:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:20:47,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:20:47,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382113474] [2023-03-30 23:20:47,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382113474] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:20:47,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234243198] [2023-03-30 23:20:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:20:47,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:20:47,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:20:47,571 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:20:47,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:20:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:47,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:20:47,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:20:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:20:47,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:20:47,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234243198] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:20:47,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:20:47,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:20:47,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555449138] [2023-03-30 23:20:47,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:20:47,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:20:47,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:20:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:20:47,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:20:47,717 INFO L87 Difference]: Start difference. First operand 18340 states and 24723 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:20:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:20:50,492 INFO L93 Difference]: Finished difference Result 52301 states and 72735 transitions. [2023-03-30 23:20:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:20:50,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 185 [2023-03-30 23:20:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:20:50,590 INFO L225 Difference]: With dead ends: 52301 [2023-03-30 23:20:50,591 INFO L226 Difference]: Without dead ends: 33967 [2023-03-30 23:20:50,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:20:50,639 INFO L413 NwaCegarLoop]: 1333 mSDtfsCounter, 806 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2163 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 2163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:20:50,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [806 Valid, 1365 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 2163 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-03-30 23:20:50,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33967 states. [2023-03-30 23:20:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33967 to 33200. [2023-03-30 23:20:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33200 states, 32491 states have (on average 1.2020251762026408) internal successors, (39055), 32620 states have internal predecessors, (39055), 170 states have call successors, (170), 170 states have call predecessors, (170), 538 states have return successors, (3937), 409 states have call predecessors, (3937), 169 states have call successors, (3937) [2023-03-30 23:20:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33200 states to 33200 states and 43162 transitions. [2023-03-30 23:20:51,649 INFO L78 Accepts]: Start accepts. Automaton has 33200 states and 43162 transitions. Word has length 185 [2023-03-30 23:20:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:20:51,650 INFO L495 AbstractCegarLoop]: Abstraction has 33200 states and 43162 transitions. [2023-03-30 23:20:51,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:20:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 33200 states and 43162 transitions. [2023-03-30 23:20:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-03-30 23:20:51,651 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:20:51,652 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:20:51,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:20:51,857 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 [2023-03-30 23:20:51,858 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:20:51,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:20:51,858 INFO L85 PathProgramCache]: Analyzing trace with hash -199578549, now seen corresponding path program 1 times [2023-03-30 23:20:51,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:20:51,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514597307] [2023-03-30 23:20:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:20:51,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:20:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:51,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:20:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:51,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:20:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:20:52,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:20:52,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514597307] [2023-03-30 23:20:52,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514597307] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:20:52,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038075535] [2023-03-30 23:20:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:20:52,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:20:52,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:20:52,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:20:52,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:20:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:52,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:20:52,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:20:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:20:52,227 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:20:52,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038075535] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:20:52,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:20:52,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:20:52,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632809412] [2023-03-30 23:20:52,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:20:52,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:20:52,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:20:52,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:20:52,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:20:52,231 INFO L87 Difference]: Start difference. First operand 33200 states and 43162 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:20:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:20:55,571 INFO L93 Difference]: Finished difference Result 82781 states and 110282 transitions. [2023-03-30 23:20:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:20:55,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 186 [2023-03-30 23:20:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:20:55,780 INFO L225 Difference]: With dead ends: 82781 [2023-03-30 23:20:55,780 INFO L226 Difference]: Without dead ends: 49587 [2023-03-30 23:20:55,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:20:55,818 INFO L413 NwaCegarLoop]: 1388 mSDtfsCounter, 745 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:20:55,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 1420 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-30 23:20:55,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49587 states. [2023-03-30 23:20:56,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49587 to 47286. [2023-03-30 23:20:56,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47286 states, 46325 states have (on average 1.1988127361036158) internal successors, (55535), 46498 states have internal predecessors, (55535), 242 states have call successors, (242), 242 states have call predecessors, (242), 718 states have return successors, (6912), 545 states have call predecessors, (6912), 241 states have call successors, (6912) [2023-03-30 23:20:56,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47286 states to 47286 states and 62689 transitions. [2023-03-30 23:20:56,948 INFO L78 Accepts]: Start accepts. Automaton has 47286 states and 62689 transitions. Word has length 186 [2023-03-30 23:20:56,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:20:56,948 INFO L495 AbstractCegarLoop]: Abstraction has 47286 states and 62689 transitions. [2023-03-30 23:20:56,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:20:56,949 INFO L276 IsEmpty]: Start isEmpty. Operand 47286 states and 62689 transitions. [2023-03-30 23:20:56,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-03-30 23:20:56,951 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:20:56,951 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:20:56,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:20:57,156 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 [2023-03-30 23:20:57,157 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:20:57,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:20:57,157 INFO L85 PathProgramCache]: Analyzing trace with hash 198015019, now seen corresponding path program 1 times [2023-03-30 23:20:57,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:20:57,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391730009] [2023-03-30 23:20:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:20:57,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:20:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:57,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:20:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:57,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:20:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:57,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-03-30 23:20:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-03-30 23:20:57,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:20:57,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391730009] [2023-03-30 23:20:57,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391730009] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:20:57,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705827984] [2023-03-30 23:20:57,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:20:57,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:20:57,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:20:57,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:20:57,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:20:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:20:57,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:20:57,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:20:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-03-30 23:20:57,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:20:57,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705827984] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:20:57,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:20:57,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:20:57,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256367137] [2023-03-30 23:20:57,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:20:57,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:20:57,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:20:57,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:20:57,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:20:57,563 INFO L87 Difference]: Start difference. First operand 47286 states and 62689 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:21:00,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:00,638 INFO L93 Difference]: Finished difference Result 117908 states and 161877 transitions. [2023-03-30 23:21:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:21:00,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 258 [2023-03-30 23:21:00,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:00,965 INFO L225 Difference]: With dead ends: 117908 [2023-03-30 23:21:00,966 INFO L226 Difference]: Without dead ends: 70628 [2023-03-30 23:21:01,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:01,017 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 864 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:01,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 1202 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-03-30 23:21:01,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70628 states. [2023-03-30 23:21:02,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70628 to 66783. [2023-03-30 23:21:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66783 states, 65496 states have (on average 1.2019054598754122) internal successors, (78720), 65725 states have internal predecessors, (78720), 342 states have call successors, (342), 342 states have call predecessors, (342), 944 states have return successors, (11778), 715 states have call predecessors, (11778), 341 states have call successors, (11778) [2023-03-30 23:21:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66783 states to 66783 states and 90840 transitions. [2023-03-30 23:21:02,507 INFO L78 Accepts]: Start accepts. Automaton has 66783 states and 90840 transitions. Word has length 258 [2023-03-30 23:21:02,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:02,508 INFO L495 AbstractCegarLoop]: Abstraction has 66783 states and 90840 transitions. [2023-03-30 23:21:02,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:21:02,508 INFO L276 IsEmpty]: Start isEmpty. Operand 66783 states and 90840 transitions. [2023-03-30 23:21:02,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-03-30 23:21:02,511 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:02,512 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:21:02,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 23:21:02,716 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 [2023-03-30 23:21:02,717 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:02,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:02,718 INFO L85 PathProgramCache]: Analyzing trace with hash 516533359, now seen corresponding path program 1 times [2023-03-30 23:21:02,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:02,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051775853] [2023-03-30 23:21:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:02,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:03,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:03,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:03,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-03-30 23:21:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:21:03,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:03,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051775853] [2023-03-30 23:21:03,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051775853] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:03,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825524255] [2023-03-30 23:21:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:03,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:03,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:03,231 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:21:03,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:21:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:03,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:21:03,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:21:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:03,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:21:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:03,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825524255] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:21:03,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:21:03,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:21:03,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203721969] [2023-03-30 23:21:03,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:21:03,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:21:03,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:03,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:21:03,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:21:03,706 INFO L87 Difference]: Start difference. First operand 66783 states and 90840 transitions. Second operand has 11 states, 11 states have (on average 40.54545454545455) internal successors, (446), 9 states have internal predecessors, (446), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:21:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:10,679 INFO L93 Difference]: Finished difference Result 140035 states and 193154 transitions. [2023-03-30 23:21:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 23:21:10,680 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 40.54545454545455) internal successors, (446), 9 states have internal predecessors, (446), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 276 [2023-03-30 23:21:10,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:11,007 INFO L225 Difference]: With dead ends: 140035 [2023-03-30 23:21:11,007 INFO L226 Difference]: Without dead ends: 73258 [2023-03-30 23:21:11,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 555 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-03-30 23:21:11,063 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6074 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 8726 mSolverCounterSat, 2061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6074 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 10787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2061 IncrementalHoareTripleChecker+Valid, 8726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:11,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6074 Valid, 195 Invalid, 10787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2061 Valid, 8726 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-03-30 23:21:11,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73258 states. [2023-03-30 23:21:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73258 to 71470. [2023-03-30 23:21:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71470 states, 69813 states have (on average 1.168106226634008) internal successors, (81549), 70180 states have internal predecessors, (81549), 362 states have call successors, (362), 362 states have call predecessors, (362), 1294 states have return successors, (11739), 927 states have call predecessors, (11739), 361 states have call successors, (11739) [2023-03-30 23:21:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71470 states to 71470 states and 93650 transitions. [2023-03-30 23:21:12,622 INFO L78 Accepts]: Start accepts. Automaton has 71470 states and 93650 transitions. Word has length 276 [2023-03-30 23:21:12,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:12,622 INFO L495 AbstractCegarLoop]: Abstraction has 71470 states and 93650 transitions. [2023-03-30 23:21:12,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 40.54545454545455) internal successors, (446), 9 states have internal predecessors, (446), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:21:12,623 INFO L276 IsEmpty]: Start isEmpty. Operand 71470 states and 93650 transitions. [2023-03-30 23:21:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-03-30 23:21:12,630 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:12,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:21:12,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 23:21:12,835 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 [2023-03-30 23:21:12,836 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:12,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:12,836 INFO L85 PathProgramCache]: Analyzing trace with hash -984587219, now seen corresponding path program 1 times [2023-03-30 23:21:12,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:12,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624513598] [2023-03-30 23:21:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:12,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:13,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:13,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:13,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-03-30 23:21:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 23:21:13,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:13,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624513598] [2023-03-30 23:21:13,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624513598] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:13,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435622298] [2023-03-30 23:21:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:13,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:13,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:13,478 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:21:13,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 23:21:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:13,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:21:13,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:21:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:13,631 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:21:13,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435622298] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:13,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:21:13,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-03-30 23:21:13,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375898082] [2023-03-30 23:21:13,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:13,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:21:13,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:13,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:21:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:13,633 INFO L87 Difference]: Start difference. First operand 71470 states and 93650 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:21:16,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:16,735 INFO L93 Difference]: Finished difference Result 159256 states and 208372 transitions. [2023-03-30 23:21:16,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:21:16,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 350 [2023-03-30 23:21:16,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:17,015 INFO L225 Difference]: With dead ends: 159256 [2023-03-30 23:21:17,016 INFO L226 Difference]: Without dead ends: 88559 [2023-03-30 23:21:17,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:17,099 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 825 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:17,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 237 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-03-30 23:21:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88559 states. [2023-03-30 23:21:18,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88559 to 85483. [2023-03-30 23:21:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85483 states, 83600 states have (on average 1.135956937799043) internal successors, (94966), 84006 states have internal predecessors, (94966), 434 states have call successors, (434), 434 states have call predecessors, (434), 1448 states have return successors, (13131), 1042 states have call predecessors, (13131), 433 states have call successors, (13131)