/usr/lib/jvm/java-1.11.0-openjdk-amd64/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 --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 14:43:49,593 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 14:43:49,665 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 14:43:49,668 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 14:43:49,668 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 14:43:49,697 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 14:43:49,698 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 14:43:49,698 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 14:43:49,699 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 14:43:49,699 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 14:43:49,699 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 14:43:49,699 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 14:43:49,700 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 14:43:49,700 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 14:43:49,700 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 14:43:49,701 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 14:43:49,701 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 14:43:49,701 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 14:43:49,701 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 14:43:49,702 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 14:43:49,702 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 14:43:49,708 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 14:43:49,709 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 14:43:49,709 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 14:43:49,709 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 14:43:49,709 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 14:43:49,709 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 14:43:49,710 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 14:43:49,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 14:43:49,710 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 14:43:49,710 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 14:43:49,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 14:43:49,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 14:43:49,711 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 14:43:49,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 14:43:49,712 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 14:43:49,712 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 14:43:49,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 14:43:49,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 14:43:49,712 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 14:43:49,713 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 14:43:49,713 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 14:43:49,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 14:43:49,714 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 14:43:49,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 14:43:49,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 14:43:49,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 14:43:49,880 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 14:43:49,880 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 14:43:49,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2023-12-20 14:43:50,921 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 14:43:51,069 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 14:43:51,069 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2023-12-20 14:43:51,079 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/733434dec/6c351c8e678142f3accd3bbbbe710ad9/FLAG165af53c7 [2023-12-20 14:43:51,088 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/733434dec/6c351c8e678142f3accd3bbbbe710ad9 [2023-12-20 14:43:51,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 14:43:51,096 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 14:43:51,097 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 14:43:51,097 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 14:43:51,101 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 14:43:51,101 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 02:43:51" (1/1) ... [2023-12-20 14:43:51,102 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4714179d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:43:51, skipping insertion in model container [2023-12-20 14:43:51,102 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 02:43:51" (1/1) ... [2023-12-20 14:43:51,147 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 14:43:51,246 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[913,926] [2023-12-20 14:43:51,285 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[5977,5990] [2023-12-20 14:43:51,320 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 14:43:51,329 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 14:43:51,336 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[913,926] [2023-12-20 14:43:51,347 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[5977,5990] [2023-12-20 14:43:51,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 14:43:51,400 INFO L206 MainTranslator]: Completed translation [2023-12-20 14:43:51,400 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:43:51 WrapperNode [2023-12-20 14:43:51,400 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 14:43:51,401 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 14:43:51,401 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 14:43:51,401 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 14:43:51,409 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:43:51" (1/1) ... [2023-12-20 14:43:51,417 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:43:51" (1/1) ... [2023-12-20 14:43:51,458 INFO L138 Inliner]: procedures = 58, calls = 64, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 669 [2023-12-20 14:43:51,458 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 14:43:51,458 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 14:43:51,459 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 14:43:51,459 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 14:43:51,466 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:43:51" (1/1) ... [2023-12-20 14:43:51,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:43:51" (1/1) ... [2023-12-20 14:43:51,469 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:43:51" (1/1) ... [2023-12-20 14:43:51,481 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-20 14:43:51,482 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:43:51" (1/1) ... [2023-12-20 14:43:51,482 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:43:51" (1/1) ... [2023-12-20 14:43:51,488 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:43:51" (1/1) ... [2023-12-20 14:43:51,494 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:43:51" (1/1) ... [2023-12-20 14:43:51,495 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:43:51" (1/1) ... [2023-12-20 14:43:51,497 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:43:51" (1/1) ... [2023-12-20 14:43:51,500 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 14:43:51,501 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 14:43:51,501 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 14:43:51,501 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 14:43:51,511 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:43:51" (1/1) ... [2023-12-20 14:43:51,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 14:43:51,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:43:51,545 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 14:43:51,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 14:43:51,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 14:43:51,582 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-20 14:43:51,582 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-20 14:43:51,583 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-12-20 14:43:51,583 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-12-20 14:43:51,583 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-20 14:43:51,584 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-20 14:43:51,584 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-20 14:43:51,584 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-20 14:43:51,584 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-20 14:43:51,584 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-20 14:43:51,584 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-20 14:43:51,584 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-20 14:43:51,584 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-20 14:43:51,584 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-20 14:43:51,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 14:43:51,584 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-20 14:43:51,585 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-20 14:43:51,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 14:43:51,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 14:43:51,585 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-20 14:43:51,585 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-20 14:43:51,585 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-12-20 14:43:51,586 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-12-20 14:43:51,698 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 14:43:51,702 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 14:43:52,207 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 14:43:52,274 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 14:43:52,275 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-12-20 14:43:52,275 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 02:43:52 BoogieIcfgContainer [2023-12-20 14:43:52,275 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 14:43:52,278 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 14:43:52,278 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 14:43:52,280 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 14:43:52,280 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 02:43:51" (1/3) ... [2023-12-20 14:43:52,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562f8e0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 02:43:52, skipping insertion in model container [2023-12-20 14:43:52,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:43:51" (2/3) ... [2023-12-20 14:43:52,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562f8e0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 02:43:52, skipping insertion in model container [2023-12-20 14:43:52,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 02:43:52" (3/3) ... [2023-12-20 14:43:52,282 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2023-12-20 14:43:52,295 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 14:43:52,295 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-20 14:43:52,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 14:43:52,360 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=LoopHeads, 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;@3257214a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 14:43:52,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-20 14:43:52,366 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 218 states have (on average 1.6972477064220184) internal successors, (370), 225 states have internal predecessors, (370), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2023-12-20 14:43:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-20 14:43:52,376 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:43:52,376 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] [2023-12-20 14:43:52,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:43:52,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:43:52,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1842572142, now seen corresponding path program 1 times [2023-12-20 14:43:52,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:43:52,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054736953] [2023-12-20 14:43:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:43:52,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:43:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:52,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:43:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:52,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:43:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:43:52,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:43:52,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054736953] [2023-12-20 14:43:52,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054736953] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:43:52,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:43:52,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:43:52,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998907595] [2023-12-20 14:43:52,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:43:52,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:43:52,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:43:52,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:43:52,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:43:52,645 INFO L87 Difference]: Start difference. First operand has 258 states, 218 states have (on average 1.6972477064220184) internal successors, (370), 225 states have internal predecessors, (370), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 14:43:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:43:53,008 INFO L93 Difference]: Finished difference Result 563 states and 926 transitions. [2023-12-20 14:43:53,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:43:53,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-12-20 14:43:53,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:43:53,024 INFO L225 Difference]: With dead ends: 563 [2023-12-20 14:43:53,024 INFO L226 Difference]: Without dead ends: 315 [2023-12-20 14:43:53,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 14:43:53,035 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 500 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:43:53,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 486 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 14:43:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-12-20 14:43:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 309. [2023-12-20 14:43:53,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 265 states have (on average 1.5433962264150944) internal successors, (409), 270 states have internal predecessors, (409), 31 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (33), 27 states have call predecessors, (33), 27 states have call successors, (33) [2023-12-20 14:43:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 473 transitions. [2023-12-20 14:43:53,081 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 473 transitions. Word has length 37 [2023-12-20 14:43:53,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:43:53,081 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 473 transitions. [2023-12-20 14:43:53,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 14:43:53,082 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 473 transitions. [2023-12-20 14:43:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 14:43:53,084 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:43:53,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:43:53,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 14:43:53,084 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:43:53,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:43:53,085 INFO L85 PathProgramCache]: Analyzing trace with hash -425398402, now seen corresponding path program 1 times [2023-12-20 14:43:53,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:43:53,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557486030] [2023-12-20 14:43:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:43:53,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:43:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:53,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:43:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:53,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:43:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:43:53,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:43:53,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557486030] [2023-12-20 14:43:53,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557486030] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:43:53,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:43:53,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:43:53,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391640703] [2023-12-20 14:43:53,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:43:53,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:43:53,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:43:53,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:43:53,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:43:53,179 INFO L87 Difference]: Start difference. First operand 309 states and 473 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 14:43:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:43:53,464 INFO L93 Difference]: Finished difference Result 543 states and 817 transitions. [2023-12-20 14:43:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:43:53,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2023-12-20 14:43:53,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:43:53,467 INFO L225 Difference]: With dead ends: 543 [2023-12-20 14:43:53,467 INFO L226 Difference]: Without dead ends: 432 [2023-12-20 14:43:53,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 14:43:53,468 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 513 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 14:43:53,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 479 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 14:43:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2023-12-20 14:43:53,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 409. [2023-12-20 14:43:53,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 352 states have (on average 1.4971590909090908) internal successors, (527), 358 states have internal predecessors, (527), 39 states have call successors, (39), 16 states have call predecessors, (39), 16 states have return successors, (47), 35 states have call predecessors, (47), 35 states have call successors, (47) [2023-12-20 14:43:53,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 613 transitions. [2023-12-20 14:43:53,491 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 613 transitions. Word has length 38 [2023-12-20 14:43:53,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:43:53,492 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 613 transitions. [2023-12-20 14:43:53,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 14:43:53,492 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 613 transitions. [2023-12-20 14:43:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-20 14:43:53,494 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:43:53,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:43:53,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 14:43:53,494 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:43:53,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:43:53,495 INFO L85 PathProgramCache]: Analyzing trace with hash 522643096, now seen corresponding path program 1 times [2023-12-20 14:43:53,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:43:53,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423879720] [2023-12-20 14:43:53,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:43:53,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:43:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:53,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:43:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:53,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:43:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:43:53,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:43:53,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423879720] [2023-12-20 14:43:53,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423879720] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:43:53,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:43:53,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:43:53,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759262248] [2023-12-20 14:43:53,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:43:53,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:43:53,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:43:53,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:43:53,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:43:53,546 INFO L87 Difference]: Start difference. First operand 409 states and 613 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 14:43:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:43:53,823 INFO L93 Difference]: Finished difference Result 829 states and 1194 transitions. [2023-12-20 14:43:53,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:43:53,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2023-12-20 14:43:53,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:43:53,826 INFO L225 Difference]: With dead ends: 829 [2023-12-20 14:43:53,826 INFO L226 Difference]: Without dead ends: 618 [2023-12-20 14:43:53,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 14:43:53,828 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 214 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 14:43:53,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 661 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 14:43:53,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2023-12-20 14:43:53,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 514. [2023-12-20 14:43:53,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 445 states have (on average 1.4741573033707864) internal successors, (656), 453 states have internal predecessors, (656), 45 states have call successors, (45), 22 states have call predecessors, (45), 22 states have return successors, (53), 39 states have call predecessors, (53), 41 states have call successors, (53) [2023-12-20 14:43:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 754 transitions. [2023-12-20 14:43:53,852 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 754 transitions. Word has length 39 [2023-12-20 14:43:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:43:53,852 INFO L495 AbstractCegarLoop]: Abstraction has 514 states and 754 transitions. [2023-12-20 14:43:53,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 14:43:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 754 transitions. [2023-12-20 14:43:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-20 14:43:53,860 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:43:53,860 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 14:43:53,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 14:43:53,860 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:43:53,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:43:53,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1026612791, now seen corresponding path program 1 times [2023-12-20 14:43:53,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:43:53,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452509269] [2023-12-20 14:43:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:43:53,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:43:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:53,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:43:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:53,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-20 14:43:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:53,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-20 14:43:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 14:43:53,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:43:53,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452509269] [2023-12-20 14:43:53,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452509269] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:43:53,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:43:53,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:43:53,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623690896] [2023-12-20 14:43:53,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:43:53,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:43:53,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:43:53,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:43:53,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:43:53,988 INFO L87 Difference]: Start difference. First operand 514 states and 754 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 14:43:54,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:43:54,252 INFO L93 Difference]: Finished difference Result 1030 states and 1471 transitions. [2023-12-20 14:43:54,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:43:54,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 54 [2023-12-20 14:43:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:43:54,257 INFO L225 Difference]: With dead ends: 1030 [2023-12-20 14:43:54,258 INFO L226 Difference]: Without dead ends: 714 [2023-12-20 14:43:54,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 14:43:54,263 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 199 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 14:43:54,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 708 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 14:43:54,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2023-12-20 14:43:54,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 680. [2023-12-20 14:43:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 587 states have (on average 1.4173764906303237) internal successors, (832), 597 states have internal predecessors, (832), 59 states have call successors, (59), 30 states have call predecessors, (59), 32 states have return successors, (77), 53 states have call predecessors, (77), 55 states have call successors, (77) [2023-12-20 14:43:54,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 968 transitions. [2023-12-20 14:43:54,296 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 968 transitions. Word has length 54 [2023-12-20 14:43:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:43:54,297 INFO L495 AbstractCegarLoop]: Abstraction has 680 states and 968 transitions. [2023-12-20 14:43:54,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 14:43:54,297 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 968 transitions. [2023-12-20 14:43:54,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-20 14:43:54,298 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:43:54,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:43:54,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 14:43:54,300 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:43:54,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:43:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash -169003874, now seen corresponding path program 1 times [2023-12-20 14:43:54,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:43:54,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813170682] [2023-12-20 14:43:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:43:54,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:43:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:54,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:43:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:54,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-20 14:43:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:54,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:43:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 14:43:54,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:43:54,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813170682] [2023-12-20 14:43:54,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813170682] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:43:54,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:43:54,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:43:54,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690923302] [2023-12-20 14:43:54,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:43:54,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:43:54,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:43:54,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:43:54,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:43:54,379 INFO L87 Difference]: Start difference. First operand 680 states and 968 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 14:43:54,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:43:54,594 INFO L93 Difference]: Finished difference Result 1259 states and 1747 transitions. [2023-12-20 14:43:54,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:43:54,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2023-12-20 14:43:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:43:54,599 INFO L225 Difference]: With dead ends: 1259 [2023-12-20 14:43:54,599 INFO L226 Difference]: Without dead ends: 857 [2023-12-20 14:43:54,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 14:43:54,603 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 499 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 14:43:54,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 491 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 14:43:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2023-12-20 14:43:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 808. [2023-12-20 14:43:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 699 states have (on average 1.3834048640915593) internal successors, (967), 711 states have internal predecessors, (967), 67 states have call successors, (67), 36 states have call predecessors, (67), 40 states have return successors, (91), 61 states have call predecessors, (91), 63 states have call successors, (91) [2023-12-20 14:43:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1125 transitions. [2023-12-20 14:43:54,636 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1125 transitions. Word has length 59 [2023-12-20 14:43:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:43:54,643 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 1125 transitions. [2023-12-20 14:43:54,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 14:43:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1125 transitions. [2023-12-20 14:43:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 14:43:54,646 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:43:54,646 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 14:43:54,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-20 14:43:54,646 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:43:54,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:43:54,647 INFO L85 PathProgramCache]: Analyzing trace with hash 208415176, now seen corresponding path program 1 times [2023-12-20 14:43:54,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:43:54,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824343159] [2023-12-20 14:43:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:43:54,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:43:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:54,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:43:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:54,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:43:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:54,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:43:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-20 14:43:54,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:43:54,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824343159] [2023-12-20 14:43:54,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824343159] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:43:54,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:43:54,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 14:43:54,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15151257] [2023-12-20 14:43:54,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:43:54,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 14:43:54,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:43:54,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 14:43:54,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 14:43:54,741 INFO L87 Difference]: Start difference. First operand 808 states and 1125 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 14:43:55,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:43:55,040 INFO L93 Difference]: Finished difference Result 1294 states and 1787 transitions. [2023-12-20 14:43:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:43:55,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2023-12-20 14:43:55,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:43:55,043 INFO L225 Difference]: With dead ends: 1294 [2023-12-20 14:43:55,043 INFO L226 Difference]: Without dead ends: 756 [2023-12-20 14:43:55,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:43:55,046 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 151 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:43:55,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 853 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 14:43:55,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2023-12-20 14:43:55,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 683. [2023-12-20 14:43:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 591 states have (on average 1.3874788494077834) internal successors, (820), 602 states have internal predecessors, (820), 57 states have call successors, (57), 30 states have call predecessors, (57), 33 states have return successors, (73), 51 states have call predecessors, (73), 53 states have call successors, (73) [2023-12-20 14:43:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 950 transitions. [2023-12-20 14:43:55,071 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 950 transitions. Word has length 60 [2023-12-20 14:43:55,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:43:55,071 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 950 transitions. [2023-12-20 14:43:55,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 14:43:55,072 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 950 transitions. [2023-12-20 14:43:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 14:43:55,073 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:43:55,073 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 14:43:55,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-20 14:43:55,073 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:43:55,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:43:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2006054792, now seen corresponding path program 1 times [2023-12-20 14:43:55,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:43:55,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198870409] [2023-12-20 14:43:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:43:55,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:43:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:55,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:43:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:55,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:43:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:55,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:43:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 14:43:55,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:43:55,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198870409] [2023-12-20 14:43:55,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198870409] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:43:55,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502732131] [2023-12-20 14:43:55,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:43:55,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:43:55,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:43:55,151 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) [2023-12-20 14:43:55,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 14:43:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:55,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-20 14:43:55,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:43:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:43:55,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 14:43:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-20 14:43:55,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502732131] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-20 14:43:55,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-20 14:43:55,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2023-12-20 14:43:55,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028856218] [2023-12-20 14:43:55,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:43:55,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:43:55,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:43:55,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:43:55,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:43:55,381 INFO L87 Difference]: Start difference. First operand 683 states and 950 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 14:43:55,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:43:55,491 INFO L93 Difference]: Finished difference Result 732 states and 1011 transitions. [2023-12-20 14:43:55,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 14:43:55,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2023-12-20 14:43:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:43:55,494 INFO L225 Difference]: With dead ends: 732 [2023-12-20 14:43:55,494 INFO L226 Difference]: Without dead ends: 729 [2023-12-20 14:43:55,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-20 14:43:55,495 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 682 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:43:55,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 431 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 14:43:55,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2023-12-20 14:43:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 682. [2023-12-20 14:43:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 591 states have (on average 1.3840947546531304) internal successors, (818), 601 states have internal predecessors, (818), 56 states have call successors, (56), 30 states have call predecessors, (56), 33 states have return successors, (73), 51 states have call predecessors, (73), 53 states have call successors, (73) [2023-12-20 14:43:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 947 transitions. [2023-12-20 14:43:55,519 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 947 transitions. Word has length 60 [2023-12-20 14:43:55,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:43:55,519 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 947 transitions. [2023-12-20 14:43:55,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 14:43:55,520 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 947 transitions. [2023-12-20 14:43:55,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-20 14:43:55,521 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:43:55,521 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-20 14:43:55,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-20 14:43:55,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:43:55,729 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:43:55,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:43:55,729 INFO L85 PathProgramCache]: Analyzing trace with hash 2057243361, now seen corresponding path program 1 times [2023-12-20 14:43:55,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:43:55,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660706910] [2023-12-20 14:43:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:43:55,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:43:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:55,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:43:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:55,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:43:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:55,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:43:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 14:43:55,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:43:55,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660706910] [2023-12-20 14:43:55,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660706910] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:43:55,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394143741] [2023-12-20 14:43:55,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:43:55,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:43:55,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:43:55,791 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) [2023-12-20 14:43:55,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 14:43:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:55,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-20 14:43:55,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:43:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:43:56,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 14:43:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-20 14:43:56,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394143741] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 14:43:56,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 14:43:56,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2023-12-20 14:43:56,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371640456] [2023-12-20 14:43:56,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 14:43:56,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-20 14:43:56,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:43:56,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-20 14:43:56,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-20 14:43:56,103 INFO L87 Difference]: Start difference. First operand 682 states and 947 transitions. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 9 states have internal predecessors, (134), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-20 14:43:56,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:43:56,840 INFO L93 Difference]: Finished difference Result 1918 states and 2599 transitions. [2023-12-20 14:43:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-20 14:43:56,841 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 9 states have internal predecessors, (134), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2023-12-20 14:43:56,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:43:56,846 INFO L225 Difference]: With dead ends: 1918 [2023-12-20 14:43:56,846 INFO L226 Difference]: Without dead ends: 1520 [2023-12-20 14:43:56,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2023-12-20 14:43:56,849 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 687 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 2011 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:43:56,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 2011 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 14:43:56,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2023-12-20 14:43:56,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1011. [2023-12-20 14:43:56,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 883 states have (on average 1.349943374858437) internal successors, (1192), 900 states have internal predecessors, (1192), 75 states have call successors, (75), 43 states have call predecessors, (75), 51 states have return successors, (104), 68 states have call predecessors, (104), 72 states have call successors, (104) [2023-12-20 14:43:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1371 transitions. [2023-12-20 14:43:56,891 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1371 transitions. Word has length 61 [2023-12-20 14:43:56,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:43:56,891 INFO L495 AbstractCegarLoop]: Abstraction has 1011 states and 1371 transitions. [2023-12-20 14:43:56,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 9 states have internal predecessors, (134), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-20 14:43:56,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1371 transitions. [2023-12-20 14:43:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-20 14:43:56,893 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:43:56,893 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-20 14:43:56,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 14:43:57,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-20 14:43:57,104 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:43:57,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:43:57,105 INFO L85 PathProgramCache]: Analyzing trace with hash -401503642, now seen corresponding path program 1 times [2023-12-20 14:43:57,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:43:57,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339536980] [2023-12-20 14:43:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:43:57,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:43:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:57,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:43:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:57,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:43:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:57,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-20 14:43:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:57,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-12-20 14:43:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 14:43:57,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:43:57,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339536980] [2023-12-20 14:43:57,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339536980] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:43:57,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:43:57,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:43:57,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801453817] [2023-12-20 14:43:57,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:43:57,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:43:57,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:43:57,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:43:57,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:43:57,169 INFO L87 Difference]: Start difference. First operand 1011 states and 1371 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-20 14:43:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:43:57,385 INFO L93 Difference]: Finished difference Result 1645 states and 2194 transitions. [2023-12-20 14:43:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:43:57,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 78 [2023-12-20 14:43:57,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:43:57,390 INFO L225 Difference]: With dead ends: 1645 [2023-12-20 14:43:57,390 INFO L226 Difference]: Without dead ends: 980 [2023-12-20 14:43:57,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 14:43:57,394 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 512 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 14:43:57,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 507 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 14:43:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2023-12-20 14:43:57,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 903. [2023-12-20 14:43:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 788 states have (on average 1.350253807106599) internal successors, (1064), 805 states have internal predecessors, (1064), 68 states have call successors, (68), 38 states have call predecessors, (68), 45 states have return successors, (93), 60 states have call predecessors, (93), 65 states have call successors, (93) [2023-12-20 14:43:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1225 transitions. [2023-12-20 14:43:57,458 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1225 transitions. Word has length 78 [2023-12-20 14:43:57,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:43:57,458 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1225 transitions. [2023-12-20 14:43:57,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-20 14:43:57,458 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1225 transitions. [2023-12-20 14:43:57,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 14:43:57,464 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:43:57,464 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:43:57,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-20 14:43:57,464 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:43:57,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:43:57,465 INFO L85 PathProgramCache]: Analyzing trace with hash -43566558, now seen corresponding path program 1 times [2023-12-20 14:43:57,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:43:57,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071591658] [2023-12-20 14:43:57,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:43:57,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:43:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:57,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:43:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:57,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:43:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:57,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-12-20 14:43:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:57,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-12-20 14:43:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:57,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-12-20 14:43:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-20 14:43:57,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:43:57,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071591658] [2023-12-20 14:43:57,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071591658] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:43:57,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781088673] [2023-12-20 14:43:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:43:57,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:43:57,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:43:57,538 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) [2023-12-20 14:43:57,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 14:43:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:57,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 14:43:57,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:43:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 14:43:57,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 14:43:57,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781088673] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:43:57,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 14:43:57,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-20 14:43:57,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403691272] [2023-12-20 14:43:57,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:43:57,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 14:43:57,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:43:57,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 14:43:57,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 14:43:57,652 INFO L87 Difference]: Start difference. First operand 903 states and 1225 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-20 14:43:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:43:57,710 INFO L93 Difference]: Finished difference Result 1188 states and 1583 transitions. [2023-12-20 14:43:57,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 14:43:57,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 92 [2023-12-20 14:43:57,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:43:57,711 INFO L225 Difference]: With dead ends: 1188 [2023-12-20 14:43:57,711 INFO L226 Difference]: Without dead ends: 193 [2023-12-20 14:43:57,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 14:43:57,713 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 55 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 14:43:57,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 728 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 14:43:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-12-20 14:43:57,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-12-20 14:43:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 165 states have (on average 1.6) internal successors, (264), 167 states have internal predecessors, (264), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-20 14:43:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 304 transitions. [2023-12-20 14:43:57,720 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 304 transitions. Word has length 92 [2023-12-20 14:43:57,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:43:57,720 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 304 transitions. [2023-12-20 14:43:57,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-20 14:43:57,720 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 304 transitions. [2023-12-20 14:43:57,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 14:43:57,720 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:43:57,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:43:57,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 14:43:57,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:43:57,928 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:43:57,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:43:57,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1427183430, now seen corresponding path program 1 times [2023-12-20 14:43:57,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:43:57,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456809999] [2023-12-20 14:43:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:43:57,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:43:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:57,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:43:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:58,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:43:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:58,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:43:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:58,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:43:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:58,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:43:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:43:58,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:43:58,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456809999] [2023-12-20 14:43:58,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456809999] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:43:58,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:43:58,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:43:58,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255554122] [2023-12-20 14:43:58,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:43:58,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:43:58,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:43:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:43:58,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:43:58,057 INFO L87 Difference]: Start difference. First operand 193 states and 304 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:43:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:43:59,458 INFO L93 Difference]: Finished difference Result 691 states and 1121 transitions. [2023-12-20 14:43:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:43:59,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 92 [2023-12-20 14:43:59,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:43:59,461 INFO L225 Difference]: With dead ends: 691 [2023-12-20 14:43:59,461 INFO L226 Difference]: Without dead ends: 510 [2023-12-20 14:43:59,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:43:59,462 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 694 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:43:59,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 1163 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1915 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-20 14:43:59,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-12-20 14:43:59,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 381. [2023-12-20 14:43:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 329 states have (on average 1.6109422492401215) internal successors, (530), 333 states have internal predecessors, (530), 37 states have call successors, (37), 13 states have call predecessors, (37), 14 states have return successors, (42), 36 states have call predecessors, (42), 35 states have call successors, (42) [2023-12-20 14:43:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 609 transitions. [2023-12-20 14:43:59,482 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 609 transitions. Word has length 92 [2023-12-20 14:43:59,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:43:59,482 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 609 transitions. [2023-12-20 14:43:59,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:43:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 609 transitions. [2023-12-20 14:43:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 14:43:59,483 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:43:59,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:43:59,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-20 14:43:59,483 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:43:59,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:43:59,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1454249032, now seen corresponding path program 1 times [2023-12-20 14:43:59,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:43:59,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3039343] [2023-12-20 14:43:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:43:59,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:43:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:59,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:43:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:59,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:43:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:59,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:43:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:59,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:43:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:59,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:43:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:43:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:43:59,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:43:59,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3039343] [2023-12-20 14:43:59,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3039343] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:43:59,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:43:59,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:43:59,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085282776] [2023-12-20 14:43:59,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:43:59,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:43:59,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:43:59,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:43:59,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:43:59,632 INFO L87 Difference]: Start difference. First operand 381 states and 609 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:00,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:00,965 INFO L93 Difference]: Finished difference Result 1319 states and 2136 transitions. [2023-12-20 14:44:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:44:00,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 92 [2023-12-20 14:44:00,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:00,984 INFO L225 Difference]: With dead ends: 1319 [2023-12-20 14:44:00,984 INFO L226 Difference]: Without dead ends: 952 [2023-12-20 14:44:00,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:44:00,986 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 698 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:00,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 1082 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 14:44:00,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2023-12-20 14:44:01,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 725. [2023-12-20 14:44:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 631 states have (on average 1.6022187004754358) internal successors, (1011), 637 states have internal predecessors, (1011), 65 states have call successors, (65), 25 states have call predecessors, (65), 28 states have return successors, (80), 66 states have call predecessors, (80), 63 states have call successors, (80) [2023-12-20 14:44:01,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1156 transitions. [2023-12-20 14:44:01,019 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1156 transitions. Word has length 92 [2023-12-20 14:44:01,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:01,019 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1156 transitions. [2023-12-20 14:44:01,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:01,020 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1156 transitions. [2023-12-20 14:44:01,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 14:44:01,021 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:01,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:44:01,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-20 14:44:01,021 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:01,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:01,022 INFO L85 PathProgramCache]: Analyzing trace with hash -623087866, now seen corresponding path program 1 times [2023-12-20 14:44:01,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:01,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122258553] [2023-12-20 14:44:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:01,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:01,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:44:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:01,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:44:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:01,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:44:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:01,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:44:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:01,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:44:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:44:01,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:01,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122258553] [2023-12-20 14:44:01,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122258553] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:01,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:01,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:44:01,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55384569] [2023-12-20 14:44:01,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:01,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:44:01,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:01,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:44:01,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:01,141 INFO L87 Difference]: Start difference. First operand 725 states and 1156 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:01,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:01,795 INFO L93 Difference]: Finished difference Result 1666 states and 2702 transitions. [2023-12-20 14:44:01,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:44:01,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 92 [2023-12-20 14:44:01,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:01,799 INFO L225 Difference]: With dead ends: 1666 [2023-12-20 14:44:01,799 INFO L226 Difference]: Without dead ends: 953 [2023-12-20 14:44:01,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:44:01,802 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 539 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:01,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 582 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 14:44:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2023-12-20 14:44:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 725. [2023-12-20 14:44:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 631 states have (on average 1.5942947702060222) internal successors, (1006), 637 states have internal predecessors, (1006), 65 states have call successors, (65), 25 states have call predecessors, (65), 28 states have return successors, (80), 66 states have call predecessors, (80), 63 states have call successors, (80) [2023-12-20 14:44:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1151 transitions. [2023-12-20 14:44:01,877 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1151 transitions. Word has length 92 [2023-12-20 14:44:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:01,878 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1151 transitions. [2023-12-20 14:44:01,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:01,878 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1151 transitions. [2023-12-20 14:44:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 14:44:01,879 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:01,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:44:01,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-20 14:44:01,879 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:01,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:01,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1111016584, now seen corresponding path program 1 times [2023-12-20 14:44:01,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:01,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897405267] [2023-12-20 14:44:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:01,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:01,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:44:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:01,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:44:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:01,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:44:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:01,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:44:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:01,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:44:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:44:01,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:01,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897405267] [2023-12-20 14:44:01,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897405267] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:01,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:01,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:44:01,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677661143] [2023-12-20 14:44:01,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:01,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:44:01,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:01,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:44:01,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:01,992 INFO L87 Difference]: Start difference. First operand 725 states and 1151 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:02,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:02,616 INFO L93 Difference]: Finished difference Result 1662 states and 2681 transitions. [2023-12-20 14:44:02,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:44:02,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 92 [2023-12-20 14:44:02,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:02,623 INFO L225 Difference]: With dead ends: 1662 [2023-12-20 14:44:02,623 INFO L226 Difference]: Without dead ends: 949 [2023-12-20 14:44:02,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:44:02,625 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 612 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:02,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 486 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 14:44:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2023-12-20 14:44:02,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 725. [2023-12-20 14:44:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 631 states have (on average 1.5863708399366085) internal successors, (1001), 637 states have internal predecessors, (1001), 65 states have call successors, (65), 25 states have call predecessors, (65), 28 states have return successors, (80), 66 states have call predecessors, (80), 63 states have call successors, (80) [2023-12-20 14:44:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1146 transitions. [2023-12-20 14:44:02,659 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1146 transitions. Word has length 92 [2023-12-20 14:44:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:02,659 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1146 transitions. [2023-12-20 14:44:02,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1146 transitions. [2023-12-20 14:44:02,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 14:44:02,661 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:02,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:44:02,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-20 14:44:02,661 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:02,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1998239430, now seen corresponding path program 1 times [2023-12-20 14:44:02,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:02,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529416266] [2023-12-20 14:44:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:02,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:02,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:44:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:02,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:44:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:02,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:44:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:02,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:44:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:02,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:44:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:44:02,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:02,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529416266] [2023-12-20 14:44:02,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529416266] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:02,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:02,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:44:02,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456082243] [2023-12-20 14:44:02,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:02,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:44:02,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:02,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:44:02,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:02,774 INFO L87 Difference]: Start difference. First operand 725 states and 1146 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:03,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:03,304 INFO L93 Difference]: Finished difference Result 1657 states and 2658 transitions. [2023-12-20 14:44:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:44:03,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 92 [2023-12-20 14:44:03,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:03,308 INFO L225 Difference]: With dead ends: 1657 [2023-12-20 14:44:03,308 INFO L226 Difference]: Without dead ends: 944 [2023-12-20 14:44:03,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:44:03,311 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 610 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:03,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 486 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 14:44:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2023-12-20 14:44:03,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 725. [2023-12-20 14:44:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 631 states have (on average 1.578446909667195) internal successors, (996), 637 states have internal predecessors, (996), 65 states have call successors, (65), 25 states have call predecessors, (65), 28 states have return successors, (80), 66 states have call predecessors, (80), 63 states have call successors, (80) [2023-12-20 14:44:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1141 transitions. [2023-12-20 14:44:03,344 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1141 transitions. Word has length 92 [2023-12-20 14:44:03,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:03,344 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1141 transitions. [2023-12-20 14:44:03,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:03,344 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1141 transitions. [2023-12-20 14:44:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 14:44:03,345 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:03,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:44:03,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-20 14:44:03,346 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:03,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:03,346 INFO L85 PathProgramCache]: Analyzing trace with hash 87196872, now seen corresponding path program 1 times [2023-12-20 14:44:03,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:03,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821520479] [2023-12-20 14:44:03,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:03,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:03,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:44:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:03,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:44:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:03,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:44:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:03,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:44:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:03,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:44:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:44:03,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:03,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821520479] [2023-12-20 14:44:03,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821520479] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:03,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:03,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:44:03,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149636117] [2023-12-20 14:44:03,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:03,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:44:03,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:03,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:44:03,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:03,461 INFO L87 Difference]: Start difference. First operand 725 states and 1141 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:04,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:04,824 INFO L93 Difference]: Finished difference Result 2800 states and 4451 transitions. [2023-12-20 14:44:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:44:04,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 92 [2023-12-20 14:44:04,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:04,832 INFO L225 Difference]: With dead ends: 2800 [2023-12-20 14:44:04,832 INFO L226 Difference]: Without dead ends: 2089 [2023-12-20 14:44:04,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:44:04,834 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 880 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1712 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:04,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [898 Valid, 1078 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1712 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 14:44:04,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2023-12-20 14:44:04,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1416. [2023-12-20 14:44:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1242 states have (on average 1.5724637681159421) internal successors, (1953), 1252 states have internal predecessors, (1953), 117 states have call successors, (117), 49 states have call predecessors, (117), 56 states have return successors, (158), 122 states have call predecessors, (158), 115 states have call successors, (158) [2023-12-20 14:44:04,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2228 transitions. [2023-12-20 14:44:04,923 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2228 transitions. Word has length 92 [2023-12-20 14:44:04,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:04,924 INFO L495 AbstractCegarLoop]: Abstraction has 1416 states and 2228 transitions. [2023-12-20 14:44:04,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:04,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2228 transitions. [2023-12-20 14:44:04,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 14:44:04,925 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:04,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:44:04,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-20 14:44:04,926 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:04,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:04,926 INFO L85 PathProgramCache]: Analyzing trace with hash 164097670, now seen corresponding path program 1 times [2023-12-20 14:44:04,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:04,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205989177] [2023-12-20 14:44:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:04,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:04,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:44:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:04,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:44:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:05,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:44:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:05,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:44:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:05,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:44:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:44:05,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:05,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205989177] [2023-12-20 14:44:05,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205989177] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:05,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:05,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:44:05,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871241014] [2023-12-20 14:44:05,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:05,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:44:05,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:05,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:44:05,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:05,033 INFO L87 Difference]: Start difference. First operand 1416 states and 2228 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:06,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:06,455 INFO L93 Difference]: Finished difference Result 5403 states and 8594 transitions. [2023-12-20 14:44:06,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:44:06,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 92 [2023-12-20 14:44:06,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:06,471 INFO L225 Difference]: With dead ends: 5403 [2023-12-20 14:44:06,471 INFO L226 Difference]: Without dead ends: 4001 [2023-12-20 14:44:06,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:44:06,476 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 739 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 2006 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:06,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 1108 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2006 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 14:44:06,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2023-12-20 14:44:06,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2717. [2023-12-20 14:44:06,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2717 states, 2387 states have (on average 1.5622119815668203) internal successors, (3729), 2405 states have internal predecessors, (3729), 217 states have call successors, (217), 97 states have call predecessors, (217), 112 states have return successors, (328), 230 states have call predecessors, (328), 215 states have call successors, (328) [2023-12-20 14:44:06,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2717 states to 2717 states and 4274 transitions. [2023-12-20 14:44:06,636 INFO L78 Accepts]: Start accepts. Automaton has 2717 states and 4274 transitions. Word has length 92 [2023-12-20 14:44:06,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:06,636 INFO L495 AbstractCegarLoop]: Abstraction has 2717 states and 4274 transitions. [2023-12-20 14:44:06,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:06,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2717 states and 4274 transitions. [2023-12-20 14:44:06,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 14:44:06,639 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:06,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:44:06,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-20 14:44:06,639 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:06,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:06,640 INFO L85 PathProgramCache]: Analyzing trace with hash -803252984, now seen corresponding path program 1 times [2023-12-20 14:44:06,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:06,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456244485] [2023-12-20 14:44:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:06,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:06,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:44:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:06,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:44:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:06,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:44:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:06,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:44:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:06,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:44:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:44:06,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:06,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456244485] [2023-12-20 14:44:06,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456244485] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:06,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:06,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:44:06,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087331487] [2023-12-20 14:44:06,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:06,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:44:06,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:06,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:44:06,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:06,737 INFO L87 Difference]: Start difference. First operand 2717 states and 4274 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:08,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:08,249 INFO L93 Difference]: Finished difference Result 10050 states and 15996 transitions. [2023-12-20 14:44:08,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:44:08,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 92 [2023-12-20 14:44:08,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:08,292 INFO L225 Difference]: With dead ends: 10050 [2023-12-20 14:44:08,292 INFO L226 Difference]: Without dead ends: 7347 [2023-12-20 14:44:08,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:44:08,302 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 724 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:08,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 1118 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1871 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-20 14:44:08,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7347 states. [2023-12-20 14:44:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7347 to 5414. [2023-12-20 14:44:08,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5414 states, 4780 states have (on average 1.5629707112970712) internal successors, (7471), 4814 states have internal predecessors, (7471), 409 states have call successors, (409), 193 states have call predecessors, (409), 224 states have return successors, (714), 438 states have call predecessors, (714), 407 states have call successors, (714) [2023-12-20 14:44:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5414 states to 5414 states and 8594 transitions. [2023-12-20 14:44:08,570 INFO L78 Accepts]: Start accepts. Automaton has 5414 states and 8594 transitions. Word has length 92 [2023-12-20 14:44:08,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:08,570 INFO L495 AbstractCegarLoop]: Abstraction has 5414 states and 8594 transitions. [2023-12-20 14:44:08,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:08,571 INFO L276 IsEmpty]: Start isEmpty. Operand 5414 states and 8594 transitions. [2023-12-20 14:44:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 14:44:08,574 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:08,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:44:08,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-20 14:44:08,575 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:08,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:08,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1295879158, now seen corresponding path program 1 times [2023-12-20 14:44:08,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:08,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486172171] [2023-12-20 14:44:08,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:08,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:08,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:44:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:08,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:44:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:08,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:44:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:08,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:44:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:08,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:44:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:44:08,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:08,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486172171] [2023-12-20 14:44:08,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486172171] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:08,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:08,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:44:08,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43981827] [2023-12-20 14:44:08,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:08,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:44:08,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:08,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:44:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:08,679 INFO L87 Difference]: Start difference. First operand 5414 states and 8594 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:10,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:10,202 INFO L93 Difference]: Finished difference Result 19549 states and 31358 transitions. [2023-12-20 14:44:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:44:10,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 92 [2023-12-20 14:44:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:10,252 INFO L225 Difference]: With dead ends: 19549 [2023-12-20 14:44:10,253 INFO L226 Difference]: Without dead ends: 14149 [2023-12-20 14:44:10,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:44:10,271 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 756 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:10,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 1118 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 14:44:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14149 states. [2023-12-20 14:44:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14149 to 10808. [2023-12-20 14:44:10,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10808 states, 9582 states have (on average 1.5640784804842414) internal successors, (14987), 9648 states have internal predecessors, (14987), 777 states have call successors, (777), 385 states have call predecessors, (777), 448 states have return successors, (1632), 838 states have call predecessors, (1632), 775 states have call successors, (1632) [2023-12-20 14:44:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10808 states to 10808 states and 17396 transitions. [2023-12-20 14:44:10,825 INFO L78 Accepts]: Start accepts. Automaton has 10808 states and 17396 transitions. Word has length 92 [2023-12-20 14:44:10,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:10,825 INFO L495 AbstractCegarLoop]: Abstraction has 10808 states and 17396 transitions. [2023-12-20 14:44:10,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 10808 states and 17396 transitions. [2023-12-20 14:44:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 14:44:10,834 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:10,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:44:10,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-20 14:44:10,835 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:10,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:10,835 INFO L85 PathProgramCache]: Analyzing trace with hash -341939000, now seen corresponding path program 1 times [2023-12-20 14:44:10,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:10,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335059686] [2023-12-20 14:44:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:10,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:10,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:44:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:10,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:44:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:10,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:44:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:10,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:44:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:10,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:44:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:44:10,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:10,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335059686] [2023-12-20 14:44:10,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335059686] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:10,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:10,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:44:10,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590148690] [2023-12-20 14:44:10,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:10,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:44:10,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:10,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:44:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:10,922 INFO L87 Difference]: Start difference. First operand 10808 states and 17396 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:12,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:12,038 INFO L93 Difference]: Finished difference Result 24193 states and 39587 transitions. [2023-12-20 14:44:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:44:12,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 92 [2023-12-20 14:44:12,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:12,072 INFO L225 Difference]: With dead ends: 24193 [2023-12-20 14:44:12,072 INFO L226 Difference]: Without dead ends: 13397 [2023-12-20 14:44:12,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:44:12,095 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 536 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:12,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 581 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 14:44:12,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13397 states. [2023-12-20 14:44:12,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13397 to 10808. [2023-12-20 14:44:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10808 states, 9582 states have (on average 1.5572949279899813) internal successors, (14922), 9648 states have internal predecessors, (14922), 777 states have call successors, (777), 385 states have call predecessors, (777), 448 states have return successors, (1632), 838 states have call predecessors, (1632), 775 states have call successors, (1632) [2023-12-20 14:44:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10808 states to 10808 states and 17331 transitions. [2023-12-20 14:44:12,602 INFO L78 Accepts]: Start accepts. Automaton has 10808 states and 17331 transitions. Word has length 92 [2023-12-20 14:44:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:12,602 INFO L495 AbstractCegarLoop]: Abstraction has 10808 states and 17331 transitions. [2023-12-20 14:44:12,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 10808 states and 17331 transitions. [2023-12-20 14:44:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 14:44:12,609 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:12,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:44:12,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-20 14:44:12,609 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:12,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:12,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1558092726, now seen corresponding path program 1 times [2023-12-20 14:44:12,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:12,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258232096] [2023-12-20 14:44:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:12,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:12,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:44:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:12,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:44:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:12,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:44:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:12,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:44:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:12,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:44:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 14:44:12,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:12,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258232096] [2023-12-20 14:44:12,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258232096] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:12,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:12,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:44:12,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115711066] [2023-12-20 14:44:12,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:12,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:44:12,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:12,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:44:12,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:12,684 INFO L87 Difference]: Start difference. First operand 10808 states and 17331 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:14,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:14,478 INFO L93 Difference]: Finished difference Result 32304 states and 51758 transitions. [2023-12-20 14:44:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-20 14:44:14,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 92 [2023-12-20 14:44:14,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:14,555 INFO L225 Difference]: With dead ends: 32304 [2023-12-20 14:44:14,555 INFO L226 Difference]: Without dead ends: 21510 [2023-12-20 14:44:14,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-12-20 14:44:14,585 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 794 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:14,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 776 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 14:44:14,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21510 states. [2023-12-20 14:44:15,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21510 to 16235. [2023-12-20 14:44:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16235 states, 14384 states have (on average 1.5401140155728588) internal successors, (22153), 14514 states have internal predecessors, (22153), 1178 states have call successors, (1178), 577 states have call predecessors, (1178), 672 states have return successors, (2307), 1207 states have call predecessors, (2307), 1176 states have call successors, (2307) [2023-12-20 14:44:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16235 states to 16235 states and 25638 transitions. [2023-12-20 14:44:15,403 INFO L78 Accepts]: Start accepts. Automaton has 16235 states and 25638 transitions. Word has length 92 [2023-12-20 14:44:15,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:15,403 INFO L495 AbstractCegarLoop]: Abstraction has 16235 states and 25638 transitions. [2023-12-20 14:44:15,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:44:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 16235 states and 25638 transitions. [2023-12-20 14:44:15,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-20 14:44:15,435 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:15,436 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:44:15,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-20 14:44:15,436 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:15,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1775951093, now seen corresponding path program 1 times [2023-12-20 14:44:15,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:15,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704361827] [2023-12-20 14:44:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:15,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:15,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:44:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:15,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:44:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:15,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:44:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:15,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:44:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:15,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:44:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:15,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-12-20 14:44:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:15,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-12-20 14:44:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:15,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2023-12-20 14:44:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 14:44:15,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:15,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704361827] [2023-12-20 14:44:15,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704361827] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:44:15,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666276356] [2023-12-20 14:44:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:15,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:44:15,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:44:15,559 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) [2023-12-20 14:44:15,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 14:44:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:15,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 14:44:15,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:44:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-20 14:44:15,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 14:44:15,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666276356] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:15,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 14:44:15,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-20 14:44:15,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602610719] [2023-12-20 14:44:15,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:15,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 14:44:15,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:15,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 14:44:15,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:15,751 INFO L87 Difference]: Start difference. First operand 16235 states and 25638 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:44:16,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:16,860 INFO L93 Difference]: Finished difference Result 48387 states and 76912 transitions. [2023-12-20 14:44:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 14:44:16,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 148 [2023-12-20 14:44:16,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:16,963 INFO L225 Difference]: With dead ends: 48387 [2023-12-20 14:44:16,963 INFO L226 Difference]: Without dead ends: 32166 [2023-12-20 14:44:17,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:17,001 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 251 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:17,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 523 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 14:44:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32166 states. [2023-12-20 14:44:18,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32166 to 32066. [2023-12-20 14:44:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32066 states, 28421 states have (on average 1.5363639562295486) internal successors, (43665), 28679 states have internal predecessors, (43665), 2300 states have call successors, (2300), 1153 states have call predecessors, (2300), 1344 states have return successors, (4495), 2297 states have call predecessors, (4495), 2298 states have call successors, (4495) [2023-12-20 14:44:18,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32066 states to 32066 states and 50460 transitions. [2023-12-20 14:44:18,704 INFO L78 Accepts]: Start accepts. Automaton has 32066 states and 50460 transitions. Word has length 148 [2023-12-20 14:44:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:18,704 INFO L495 AbstractCegarLoop]: Abstraction has 32066 states and 50460 transitions. [2023-12-20 14:44:18,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:44:18,704 INFO L276 IsEmpty]: Start isEmpty. Operand 32066 states and 50460 transitions. [2023-12-20 14:44:18,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-20 14:44:18,775 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:18,775 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:44:18,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 14:44:18,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:44:18,986 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:18,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:18,986 INFO L85 PathProgramCache]: Analyzing trace with hash 21187955, now seen corresponding path program 1 times [2023-12-20 14:44:18,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:18,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082741648] [2023-12-20 14:44:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:18,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:19,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:44:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:19,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:44:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:19,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:44:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:19,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:44:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:19,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:44:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:19,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-12-20 14:44:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:19,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-12-20 14:44:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:19,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2023-12-20 14:44:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-20 14:44:19,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:19,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082741648] [2023-12-20 14:44:19,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082741648] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:44:19,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119983354] [2023-12-20 14:44:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:19,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:44:19,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:44:19,077 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) [2023-12-20 14:44:19,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 14:44:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:19,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 14:44:19,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:44:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 14:44:19,241 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 14:44:19,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119983354] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:19,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 14:44:19,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-20 14:44:19,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071568901] [2023-12-20 14:44:19,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:19,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 14:44:19,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:19,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 14:44:19,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:19,244 INFO L87 Difference]: Start difference. First operand 32066 states and 50460 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:44:21,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:21,626 INFO L93 Difference]: Finished difference Result 95400 states and 151060 transitions. [2023-12-20 14:44:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 14:44:21,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 148 [2023-12-20 14:44:21,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:21,827 INFO L225 Difference]: With dead ends: 95400 [2023-12-20 14:44:21,827 INFO L226 Difference]: Without dead ends: 63348 [2023-12-20 14:44:21,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:21,898 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 241 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:21,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 523 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 14:44:21,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63348 states. [2023-12-20 14:44:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63348 to 63152. [2023-12-20 14:44:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63152 states, 56063 states have (on average 1.5334355992365731) internal successors, (85969), 56577 states have internal predecessors, (85969), 4400 states have call successors, (4400), 2305 states have call predecessors, (4400), 2688 states have return successors, (8727), 4333 states have call predecessors, (8727), 4398 states have call successors, (8727) [2023-12-20 14:44:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63152 states to 63152 states and 99096 transitions. [2023-12-20 14:44:25,138 INFO L78 Accepts]: Start accepts. Automaton has 63152 states and 99096 transitions. Word has length 148 [2023-12-20 14:44:25,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:25,138 INFO L495 AbstractCegarLoop]: Abstraction has 63152 states and 99096 transitions. [2023-12-20 14:44:25,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:44:25,139 INFO L276 IsEmpty]: Start isEmpty. Operand 63152 states and 99096 transitions. [2023-12-20 14:44:25,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-20 14:44:25,220 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:25,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:44:25,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-20 14:44:25,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-20 14:44:25,426 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:25,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:25,427 INFO L85 PathProgramCache]: Analyzing trace with hash 682140529, now seen corresponding path program 1 times [2023-12-20 14:44:25,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:25,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539138883] [2023-12-20 14:44:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:25,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:25,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:44:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:25,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:44:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:25,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:44:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:25,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:44:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:25,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:44:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:25,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-12-20 14:44:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:25,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-12-20 14:44:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:25,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2023-12-20 14:44:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-20 14:44:25,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:25,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539138883] [2023-12-20 14:44:25,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539138883] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:44:25,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777718154] [2023-12-20 14:44:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:25,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:44:25,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:44:25,527 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) [2023-12-20 14:44:25,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 14:44:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:25,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 14:44:25,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:44:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-20 14:44:25,683 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 14:44:25,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777718154] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:25,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 14:44:25,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-20 14:44:25,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607836762] [2023-12-20 14:44:25,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:25,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 14:44:25,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:25,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 14:44:25,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:25,685 INFO L87 Difference]: Start difference. First operand 63152 states and 99096 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:44:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:30,619 INFO L93 Difference]: Finished difference Result 188274 states and 297340 transitions. [2023-12-20 14:44:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 14:44:30,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 148 [2023-12-20 14:44:30,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:31,166 INFO L225 Difference]: With dead ends: 188274 [2023-12-20 14:44:31,166 INFO L226 Difference]: Without dead ends: 125136 [2023-12-20 14:44:31,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:31,259 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 236 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:31,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 523 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 14:44:31,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125136 states. [2023-12-20 14:44:36,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125136 to 124748. [2023-12-20 14:44:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124748 states, 110771 states have (on average 1.5295068203771744) internal successors, (169425), 111797 states have internal predecessors, (169425), 8600 states have call successors, (8600), 4609 states have call predecessors, (8600), 5376 states have return successors, (17191), 8405 states have call predecessors, (17191), 8598 states have call successors, (17191) [2023-12-20 14:44:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124748 states to 124748 states and 195216 transitions. [2023-12-20 14:44:37,117 INFO L78 Accepts]: Start accepts. Automaton has 124748 states and 195216 transitions. Word has length 148 [2023-12-20 14:44:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:37,117 INFO L495 AbstractCegarLoop]: Abstraction has 124748 states and 195216 transitions. [2023-12-20 14:44:37,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-20 14:44:37,118 INFO L276 IsEmpty]: Start isEmpty. Operand 124748 states and 195216 transitions. [2023-12-20 14:44:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-20 14:44:37,264 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:37,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:44:37,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 14:44:37,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:44:37,470 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:37,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:37,470 INFO L85 PathProgramCache]: Analyzing trace with hash 27854515, now seen corresponding path program 1 times [2023-12-20 14:44:37,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:37,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853772761] [2023-12-20 14:44:37,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:37,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:37,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:44:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:37,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:44:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:37,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:44:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:37,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:44:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:37,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:44:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:37,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-12-20 14:44:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:37,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-12-20 14:44:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:37,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2023-12-20 14:44:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-20 14:44:37,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:37,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853772761] [2023-12-20 14:44:37,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853772761] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:44:37,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902497963] [2023-12-20 14:44:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:37,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:44:37,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:44:37,578 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 14:44:37,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 14:44:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:37,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 14:44:37,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:44:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-20 14:44:37,744 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 14:44:37,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902497963] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:37,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 14:44:37,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-20 14:44:37,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334128270] [2023-12-20 14:44:37,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:37,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 14:44:37,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:37,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 14:44:37,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:37,745 INFO L87 Difference]: Start difference. First operand 124748 states and 195216 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-20 14:44:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:47,146 INFO L93 Difference]: Finished difference Result 369099 states and 582875 transitions. [2023-12-20 14:44:47,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 14:44:47,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 148 [2023-12-20 14:44:47,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:48,196 INFO L225 Difference]: With dead ends: 369099 [2023-12-20 14:44:48,196 INFO L226 Difference]: Without dead ends: 244367 [2023-12-20 14:44:48,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:48,397 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 255 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:48,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 796 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 14:44:48,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244367 states. [2023-12-20 14:44:58,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244367 to 244367. [2023-12-20 14:44:58,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244367 states, 216929 states have (on average 1.5207003213032835) internal successors, (329884), 218724 states have internal predecessors, (329884), 16685 states have call successors, (16685), 9217 states have call predecessors, (16685), 10752 states have return successors, (37343), 16553 states have call predecessors, (37343), 16683 states have call successors, (37343) [2023-12-20 14:44:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244367 states to 244367 states and 383912 transitions. [2023-12-20 14:44:59,743 INFO L78 Accepts]: Start accepts. Automaton has 244367 states and 383912 transitions. Word has length 148 [2023-12-20 14:44:59,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:59,743 INFO L495 AbstractCegarLoop]: Abstraction has 244367 states and 383912 transitions. [2023-12-20 14:44:59,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-20 14:44:59,744 INFO L276 IsEmpty]: Start isEmpty. Operand 244367 states and 383912 transitions. [2023-12-20 14:45:00,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-12-20 14:45:00,584 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:00,585 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 14:45:00,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 14:45:00,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:45:00,794 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:00,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:00,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1696671996, now seen corresponding path program 1 times [2023-12-20 14:45:00,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:00,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177881283] [2023-12-20 14:45:00,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:00,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 14:45:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-20 14:45:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-12-20 14:45:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-12-20 14:45:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-12-20 14:45:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-12-20 14:45:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2023-12-20 14:45:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-12-20 14:45:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2023-12-20 14:45:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-20 14:45:00,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:00,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177881283] [2023-12-20 14:45:00,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177881283] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:45:00,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448125203] [2023-12-20 14:45:00,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:00,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:45:00,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:45:00,901 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 14:45:00,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 14:45:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:01,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 14:45:01,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:45:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-20 14:45:01,190 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 14:45:01,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448125203] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:01,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 14:45:01,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-20 14:45:01,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559116277] [2023-12-20 14:45:01,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:01,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 14:45:01,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 14:45:01,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:45:01,192 INFO L87 Difference]: Start difference. First operand 244367 states and 383912 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)