/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.10.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 14:44:49,612 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 14:44:49,684 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 14:44:49,687 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 14:44:49,687 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 14:44:49,714 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 14:44:49,715 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 14:44:49,715 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 14:44:49,716 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 14:44:49,720 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 14:44:49,720 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 14:44:49,721 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 14:44:49,721 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 14:44:49,723 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 14:44:49,723 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 14:44:49,723 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 14:44:49,723 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 14:44:49,723 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 14:44:49,723 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 14:44:49,724 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 14:44:49,724 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 14:44:49,724 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 14:44:49,724 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 14:44:49,724 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 14:44:49,724 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 14:44:49,725 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 14:44:49,725 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 14:44:49,725 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 14:44:49,725 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 14:44:49,726 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 14:44:49,726 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 14:44:49,726 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 14:44:49,726 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 14:44:49,727 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 14:44:49,727 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 14:44:49,727 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 14:44:49,727 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 14:44:49,727 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 14:44:49,727 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 14:44:49,727 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 14:44:49,727 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 14:44:49,728 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 14:44:49,728 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 14:44:49,728 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 14:44:49,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 14:44:49,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 14:44:49,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 14:44:49,969 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 14:44:49,970 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 14:44:49,971 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c [2023-12-20 14:44:51,188 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 14:44:51,401 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 14:44:51,401 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c [2023-12-20 14:44:51,415 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/476564017/4e982624fa6841168fc9cd69c3f4ae81/FLAG5b3800732 [2023-12-20 14:44:51,425 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/476564017/4e982624fa6841168fc9cd69c3f4ae81 [2023-12-20 14:44:51,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 14:44:51,428 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 14:44:51,429 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 14:44:51,430 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 14:44:51,434 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 14:44:51,434 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 02:44:51" (1/1) ... [2023-12-20 14:44:51,435 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1809902d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:44:51, skipping insertion in model container [2023-12-20 14:44:51,435 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 02:44:51" (1/1) ... [2023-12-20 14:44:51,507 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 14:44:51,610 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.10.cil-1.c[913,926] [2023-12-20 14:44:51,655 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.10.cil-1.c[5977,5990] [2023-12-20 14:44:51,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 14:44:51,752 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 14:44:51,772 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.10.cil-1.c[913,926] [2023-12-20 14:44:51,790 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.10.cil-1.c[5977,5990] [2023-12-20 14:44:51,826 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 14:44:51,843 INFO L206 MainTranslator]: Completed translation [2023-12-20 14:44:51,843 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:44:51 WrapperNode [2023-12-20 14:44:51,843 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 14:44:51,844 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 14:44:51,844 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 14:44:51,844 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 14:44:51,849 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:44:51" (1/1) ... [2023-12-20 14:44:51,870 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:44:51" (1/1) ... [2023-12-20 14:44:51,909 INFO L138 Inliner]: procedures = 68, calls = 79, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 969 [2023-12-20 14:44:51,909 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 14:44:51,910 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 14:44:51,910 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 14:44:51,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 14:44:51,918 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:44:51" (1/1) ... [2023-12-20 14:44:51,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:44:51" (1/1) ... [2023-12-20 14:44:51,926 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:44:51" (1/1) ... [2023-12-20 14:44:51,939 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 14:44:51,939 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:44:51" (1/1) ... [2023-12-20 14:44:51,939 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:44:51" (1/1) ... [2023-12-20 14:44:51,957 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:44:51" (1/1) ... [2023-12-20 14:44:51,966 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:44:51" (1/1) ... [2023-12-20 14:44:51,968 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:44:51" (1/1) ... [2023-12-20 14:44:51,970 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:44:51" (1/1) ... [2023-12-20 14:44:51,974 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 14:44:51,975 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 14:44:51,975 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 14:44:51,975 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 14:44:51,975 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:44:51" (1/1) ... [2023-12-20 14:44:51,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 14:44:52,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:44:52,033 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 14:44:52,035 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 14:44:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 14:44:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-20 14:44:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-20 14:44:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-12-20 14:44:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-12-20 14:44:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-20 14:44:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-20 14:44:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-20 14:44:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-20 14:44:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-20 14:44:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-20 14:44:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-20 14:44:52,059 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-20 14:44:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-20 14:44:52,059 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-20 14:44:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 14:44:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-20 14:44:52,059 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-20 14:44:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 14:44:52,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 14:44:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-20 14:44:52,059 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-20 14:44:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-12-20 14:44:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-12-20 14:44:52,181 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 14:44:52,183 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 14:44:52,755 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 14:44:52,808 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 14:44:52,808 INFO L309 CfgBuilder]: Removed 17 assume(true) statements. [2023-12-20 14:44:52,808 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 02:44:52 BoogieIcfgContainer [2023-12-20 14:44:52,808 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 14:44:52,811 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 14:44:52,812 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 14:44:52,814 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 14:44:52,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 02:44:51" (1/3) ... [2023-12-20 14:44:52,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aca626c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 02:44:52, skipping insertion in model container [2023-12-20 14:44:52,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:44:51" (2/3) ... [2023-12-20 14:44:52,815 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aca626c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 02:44:52, skipping insertion in model container [2023-12-20 14:44:52,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 02:44:52" (3/3) ... [2023-12-20 14:44:52,815 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.10.cil-1.c [2023-12-20 14:44:52,826 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 14:44:52,826 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-20 14:44:52,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 14:44:52,878 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;@c0a1aa6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 14:44:52,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-20 14:44:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand has 373 states, 328 states have (on average 1.7225609756097562) internal successors, (565), 335 states have internal predecessors, (565), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-20 14:44:52,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-20 14:44:52,892 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:52,892 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 14:44:52,893 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:52,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:52,906 INFO L85 PathProgramCache]: Analyzing trace with hash -2128058392, now seen corresponding path program 1 times [2023-12-20 14:44:52,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:52,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384870593] [2023-12-20 14:44:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:52,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:53,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:44:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:53,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:44:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:53,148 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 14:44:53,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:53,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384870593] [2023-12-20 14:44:53,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384870593] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:53,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:53,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:44:53,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347043775] [2023-12-20 14:44:53,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:53,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:44:53,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:53,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:44:53,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:44:53,191 INFO L87 Difference]: Start difference. First operand has 373 states, 328 states have (on average 1.7225609756097562) internal successors, (565), 335 states have internal predecessors, (565), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 14:44:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:53,655 INFO L93 Difference]: Finished difference Result 734 states and 1234 transitions. [2023-12-20 14:44:53,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:44:53,657 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), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-12-20 14:44:53,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:53,665 INFO L225 Difference]: With dead ends: 734 [2023-12-20 14:44:53,665 INFO L226 Difference]: Without dead ends: 375 [2023-12-20 14:44:53,669 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 14:44:53,671 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 326 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:53,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 820 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 14:44:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-12-20 14:44:53,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 367. [2023-12-20 14:44:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 325 states have (on average 1.6092307692307692) internal successors, (523), 329 states have internal predecessors, (523), 32 states have call successors, (32), 10 states have call predecessors, (32), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-12-20 14:44:53,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 583 transitions. [2023-12-20 14:44:53,717 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 583 transitions. Word has length 37 [2023-12-20 14:44:53,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:53,717 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 583 transitions. [2023-12-20 14:44:53,717 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), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 14:44:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 583 transitions. [2023-12-20 14:44:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-20 14:44:53,719 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:53,719 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 14:44:53,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 14:44:53,719 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:53,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:53,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1284052890, now seen corresponding path program 1 times [2023-12-20 14:44:53,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:53,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575363797] [2023-12-20 14:44:53,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:53,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:53,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:44:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:53,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:44:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:53,780 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 14:44:53,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:53,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575363797] [2023-12-20 14:44:53,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575363797] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:53,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:53,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:44:53,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027596099] [2023-12-20 14:44:53,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:53,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:44:53,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:53,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:44:53,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:44:53,783 INFO L87 Difference]: Start difference. First operand 367 states and 583 transitions. 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 14:44:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:54,134 INFO L93 Difference]: Finished difference Result 484 states and 753 transitions. [2023-12-20 14:44:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:44:54,135 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 14:44:54,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:54,137 INFO L225 Difference]: With dead ends: 484 [2023-12-20 14:44:54,138 INFO L226 Difference]: Without dead ends: 428 [2023-12-20 14:44:54,138 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 14:44:54,139 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 780 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:54,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 641 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 14:44:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2023-12-20 14:44:54,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 422. [2023-12-20 14:44:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 373 states have (on average 1.581769436997319) internal successors, (590), 378 states have internal predecessors, (590), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2023-12-20 14:44:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 664 transitions. [2023-12-20 14:44:54,160 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 664 transitions. Word has length 37 [2023-12-20 14:44:54,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:54,161 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 664 transitions. [2023-12-20 14:44:54,161 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 14:44:54,161 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 664 transitions. [2023-12-20 14:44:54,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 14:44:54,162 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:54,163 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 14:44:54,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 14:44:54,163 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:54,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:54,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1913421637, now seen corresponding path program 1 times [2023-12-20 14:44:54,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:54,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443952318] [2023-12-20 14:44:54,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:54,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:54,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:44:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:54,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:44:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:54,262 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 14:44:54,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:54,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443952318] [2023-12-20 14:44:54,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443952318] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:54,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:54,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:44:54,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253375196] [2023-12-20 14:44:54,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:54,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:44:54,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:54,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:44:54,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:44:54,268 INFO L87 Difference]: Start difference. First operand 422 states and 664 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 14:44:54,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:54,630 INFO L93 Difference]: Finished difference Result 656 states and 1008 transitions. [2023-12-20 14:44:54,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:44:54,630 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 14:44:54,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:54,634 INFO L225 Difference]: With dead ends: 656 [2023-12-20 14:44:54,634 INFO L226 Difference]: Without dead ends: 545 [2023-12-20 14:44:54,635 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 14:44:54,637 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 797 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:54,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [821 Valid, 648 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 14:44:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-12-20 14:44:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 522. [2023-12-20 14:44:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 460 states have (on average 1.5391304347826087) internal successors, (708), 466 states have internal predecessors, (708), 44 states have call successors, (44), 16 states have call predecessors, (44), 16 states have return successors, (52), 40 states have call predecessors, (52), 40 states have call successors, (52) [2023-12-20 14:44:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 804 transitions. [2023-12-20 14:44:54,669 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 804 transitions. Word has length 38 [2023-12-20 14:44:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:54,670 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 804 transitions. [2023-12-20 14:44:54,670 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 14:44:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 804 transitions. [2023-12-20 14:44:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-20 14:44:54,677 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:54,678 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 14:44:54,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 14:44:54,678 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:54,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:54,678 INFO L85 PathProgramCache]: Analyzing trace with hash -252467639, now seen corresponding path program 1 times [2023-12-20 14:44:54,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:54,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874135018] [2023-12-20 14:44:54,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:54,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:54,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:44:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:54,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:44:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:54,745 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 14:44:54,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:54,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874135018] [2023-12-20 14:44:54,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874135018] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:54,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:54,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:44:54,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31150508] [2023-12-20 14:44:54,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:54,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:44:54,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:54,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:44:54,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:44:54,747 INFO L87 Difference]: Start difference. First operand 522 states and 804 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 14:44:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:55,189 INFO L93 Difference]: Finished difference Result 922 states and 1355 transitions. [2023-12-20 14:44:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:44:55,189 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 14:44:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:55,192 INFO L225 Difference]: With dead ends: 922 [2023-12-20 14:44:55,192 INFO L226 Difference]: Without dead ends: 711 [2023-12-20 14:44:55,193 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 14:44:55,193 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 305 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:55,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 916 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 14:44:55,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2023-12-20 14:44:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 607. [2023-12-20 14:44:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 536 states have (on average 1.5167910447761195) internal successors, (813), 544 states have internal predecessors, (813), 48 states have call successors, (48), 21 states have call predecessors, (48), 21 states have return successors, (54), 42 states have call predecessors, (54), 44 states have call successors, (54) [2023-12-20 14:44:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 915 transitions. [2023-12-20 14:44:55,216 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 915 transitions. Word has length 39 [2023-12-20 14:44:55,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:55,217 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 915 transitions. [2023-12-20 14:44:55,217 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 14:44:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 915 transitions. [2023-12-20 14:44:55,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-20 14:44:55,218 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:55,218 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 14:44:55,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 14:44:55,218 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:55,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:55,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1206059197, now seen corresponding path program 1 times [2023-12-20 14:44:55,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:55,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325369301] [2023-12-20 14:44:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:55,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:55,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:44:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:55,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-20 14:44:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:55,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-20 14:44:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:55,276 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 14:44:55,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:55,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325369301] [2023-12-20 14:44:55,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325369301] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:55,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:55,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:44:55,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329125099] [2023-12-20 14:44:55,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:55,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:44:55,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:55,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:44:55,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:44:55,277 INFO L87 Difference]: Start difference. First operand 607 states and 915 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 14:44:55,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:55,722 INFO L93 Difference]: Finished difference Result 1084 states and 1572 transitions. [2023-12-20 14:44:55,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:44:55,723 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 14:44:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:55,726 INFO L225 Difference]: With dead ends: 1084 [2023-12-20 14:44:55,726 INFO L226 Difference]: Without dead ends: 788 [2023-12-20 14:44:55,727 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 14:44:55,728 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 294 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:55,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 961 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 14:44:55,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2023-12-20 14:44:55,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 754. [2023-12-20 14:44:55,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 662 states have (on average 1.4637462235649548) internal successors, (969), 672 states have internal predecessors, (969), 60 states have call successors, (60), 28 states have call predecessors, (60), 30 states have return successors, (74), 54 states have call predecessors, (74), 56 states have call successors, (74) [2023-12-20 14:44:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1103 transitions. [2023-12-20 14:44:55,755 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1103 transitions. Word has length 54 [2023-12-20 14:44:55,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:55,756 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1103 transitions. [2023-12-20 14:44:55,756 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 14:44:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1103 transitions. [2023-12-20 14:44:55,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-20 14:44:55,757 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:55,757 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 14:44:55,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-20 14:44:55,758 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:55,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:55,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2005994393, now seen corresponding path program 1 times [2023-12-20 14:44:55,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:55,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199415743] [2023-12-20 14:44:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:55,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:55,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:44:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:55,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-20 14:44:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:55,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:44:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:55,803 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 14:44:55,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:55,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199415743] [2023-12-20 14:44:55,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199415743] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:55,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:55,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:44:55,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002761122] [2023-12-20 14:44:55,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:55,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:44:55,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:55,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:44:55,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:44:55,805 INFO L87 Difference]: Start difference. First operand 754 states and 1103 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 14:44:56,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:56,150 INFO L93 Difference]: Finished difference Result 1312 states and 1854 transitions. [2023-12-20 14:44:56,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:44:56,151 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 14:44:56,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:56,154 INFO L225 Difference]: With dead ends: 1312 [2023-12-20 14:44:56,154 INFO L226 Difference]: Without dead ends: 910 [2023-12-20 14:44:56,155 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 14:44:56,156 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 776 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:56,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 660 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 14:44:56,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2023-12-20 14:44:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 861. [2023-12-20 14:44:56,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 756 states have (on average 1.4312169312169312) internal successors, (1082), 768 states have internal predecessors, (1082), 66 states have call successors, (66), 33 states have call predecessors, (66), 37 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2023-12-20 14:44:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1232 transitions. [2023-12-20 14:44:56,219 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1232 transitions. Word has length 59 [2023-12-20 14:44:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:56,219 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1232 transitions. [2023-12-20 14:44:56,220 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 14:44:56,220 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1232 transitions. [2023-12-20 14:44:56,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 14:44:56,221 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:56,221 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 14:44:56,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-20 14:44:56,221 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:56,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:56,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1062118076, now seen corresponding path program 1 times [2023-12-20 14:44:56,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:56,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437994105] [2023-12-20 14:44:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:56,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:56,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:44:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:56,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:44:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:56,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:44:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:56,280 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 14:44:56,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:56,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437994105] [2023-12-20 14:44:56,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437994105] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:56,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:56,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 14:44:56,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837718574] [2023-12-20 14:44:56,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:56,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 14:44:56,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:56,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 14:44:56,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 14:44:56,281 INFO L87 Difference]: Start difference. First operand 861 states and 1232 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 14:44:56,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:56,782 INFO L93 Difference]: Finished difference Result 1347 states and 1894 transitions. [2023-12-20 14:44:56,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:44:56,783 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 14:44:56,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:56,785 INFO L225 Difference]: With dead ends: 1347 [2023-12-20 14:44:56,785 INFO L226 Difference]: Without dead ends: 828 [2023-12-20 14:44:56,786 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 14:44:56,787 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 246 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:56,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 1190 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 14:44:56,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-12-20 14:44:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 755. [2023-12-20 14:44:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 664 states have (on average 1.4397590361445782) internal successors, (956), 675 states have internal predecessors, (956), 58 states have call successors, (58), 28 states have call predecessors, (58), 31 states have return successors, (70), 52 states have call predecessors, (70), 54 states have call successors, (70) [2023-12-20 14:44:56,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1084 transitions. [2023-12-20 14:44:56,807 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1084 transitions. Word has length 60 [2023-12-20 14:44:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:56,808 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1084 transitions. [2023-12-20 14:44:56,808 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 14:44:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1084 transitions. [2023-12-20 14:44:56,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 14:44:56,809 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:56,809 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 14:44:56,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-20 14:44:56,809 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:56,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:56,809 INFO L85 PathProgramCache]: Analyzing trace with hash 735521540, now seen corresponding path program 1 times [2023-12-20 14:44:56,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:56,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433804828] [2023-12-20 14:44:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:56,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:56,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:44:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:56,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:44:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:56,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:44:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:56,881 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 14:44:56,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:56,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433804828] [2023-12-20 14:44:56,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433804828] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:44:56,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960117351] [2023-12-20 14:44:56,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:56,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:44:56,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:44:56,886 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 14:44:56,914 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 14:44:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:57,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-20 14:44:57,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:44:57,098 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 14:44:57,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 14:44:57,155 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 14:44:57,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960117351] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-20 14:44:57,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-20 14:44:57,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2023-12-20 14:44:57,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194878729] [2023-12-20 14:44:57,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:57,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:44:57,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:57,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:44:57,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:44:57,157 INFO L87 Difference]: Start difference. First operand 755 states and 1084 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 14:44:57,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:57,304 INFO L93 Difference]: Finished difference Result 804 states and 1145 transitions. [2023-12-20 14:44:57,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 14:44:57,304 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 14:44:57,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:57,307 INFO L225 Difference]: With dead ends: 804 [2023-12-20 14:44:57,307 INFO L226 Difference]: Without dead ends: 801 [2023-12-20 14:44:57,307 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 14:44:57,310 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 1045 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:57,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1045 Valid, 613 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 14:44:57,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2023-12-20 14:44:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 754. [2023-12-20 14:44:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 664 states have (on average 1.4367469879518073) internal successors, (954), 674 states have internal predecessors, (954), 57 states have call successors, (57), 28 states have call predecessors, (57), 31 states have return successors, (70), 52 states have call predecessors, (70), 54 states have call successors, (70) [2023-12-20 14:44:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1081 transitions. [2023-12-20 14:44:57,335 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1081 transitions. Word has length 60 [2023-12-20 14:44:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:57,337 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1081 transitions. [2023-12-20 14:44:57,337 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 14:44:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1081 transitions. [2023-12-20 14:44:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-20 14:44:57,338 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:57,338 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 14:44:57,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 14:44:57,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:44:57,544 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:57,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:57,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1325046538, now seen corresponding path program 1 times [2023-12-20 14:44:57,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:57,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055830962] [2023-12-20 14:44:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:57,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:57,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:44:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:57,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:44:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:57,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:44:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:57,666 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 14:44:57,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:57,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055830962] [2023-12-20 14:44:57,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055830962] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:44:57,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067177987] [2023-12-20 14:44:57,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:57,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:44:57,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:44:57,668 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 14:44:57,695 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 14:44:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:57,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-20 14:44:57,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:44:57,933 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 14:44:57,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 14:44:57,992 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 14:44:57,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067177987] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 14:44:57,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 14:44:57,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2023-12-20 14:44:57,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27640739] [2023-12-20 14:44:57,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 14:44:57,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-20 14:44:57,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:57,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-20 14:44:57,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-20 14:44:57,995 INFO L87 Difference]: Start difference. First operand 754 states and 1081 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 14:44:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:59,001 INFO L93 Difference]: Finished difference Result 1990 states and 2733 transitions. [2023-12-20 14:44:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-20 14:44:59,001 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 14:44:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:59,006 INFO L225 Difference]: With dead ends: 1990 [2023-12-20 14:44:59,006 INFO L226 Difference]: Without dead ends: 1592 [2023-12-20 14:44:59,008 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 14:44:59,008 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 1002 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1033 SdHoareTripleChecker+Valid, 2268 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:59,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1033 Valid, 2268 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 14:44:59,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2023-12-20 14:44:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1083. [2023-12-20 14:44:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 956 states have (on average 1.389121338912134) internal successors, (1328), 973 states have internal predecessors, (1328), 76 states have call successors, (76), 41 states have call predecessors, (76), 49 states have return successors, (101), 69 states have call predecessors, (101), 73 states have call successors, (101) [2023-12-20 14:44:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1505 transitions. [2023-12-20 14:44:59,049 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1505 transitions. Word has length 61 [2023-12-20 14:44:59,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:59,049 INFO L495 AbstractCegarLoop]: Abstraction has 1083 states and 1505 transitions. [2023-12-20 14:44:59,049 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 14:44:59,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1505 transitions. [2023-12-20 14:44:59,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-20 14:44:59,051 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:59,051 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 14:44:59,059 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 14:44:59,257 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,SelfDestructingSolverStorable8 [2023-12-20 14:44:59,257 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:59,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:59,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1814252762, now seen corresponding path program 1 times [2023-12-20 14:44:59,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:59,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95450666] [2023-12-20 14:44:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:59,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:59,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:44:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:59,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:44:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:59,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-20 14:44:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:59,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-12-20 14:44:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:59,298 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 14:44:59,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:59,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95450666] [2023-12-20 14:44:59,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95450666] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:44:59,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:44:59,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:44:59,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099809431] [2023-12-20 14:44:59,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:44:59,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:44:59,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:44:59,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:44:59,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:44:59,299 INFO L87 Difference]: Start difference. First operand 1083 states and 1505 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 14:44:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:44:59,628 INFO L93 Difference]: Finished difference Result 1717 states and 2328 transitions. [2023-12-20 14:44:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:44:59,629 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 14:44:59,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:44:59,632 INFO L225 Difference]: With dead ends: 1717 [2023-12-20 14:44:59,632 INFO L226 Difference]: Without dead ends: 1052 [2023-12-20 14:44:59,634 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 14:44:59,634 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 799 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:44:59,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 674 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 14:44:59,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2023-12-20 14:44:59,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 975. [2023-12-20 14:44:59,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 861 states have (on average 1.3937282229965158) internal successors, (1200), 878 states have internal predecessors, (1200), 69 states have call successors, (69), 36 states have call predecessors, (69), 43 states have return successors, (90), 61 states have call predecessors, (90), 66 states have call successors, (90) [2023-12-20 14:44:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1359 transitions. [2023-12-20 14:44:59,720 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1359 transitions. Word has length 78 [2023-12-20 14:44:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:44:59,721 INFO L495 AbstractCegarLoop]: Abstraction has 975 states and 1359 transitions. [2023-12-20 14:44:59,721 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 14:44:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1359 transitions. [2023-12-20 14:44:59,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 14:44:59,723 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:44:59,723 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 14:44:59,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-20 14:44:59,723 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:44:59,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:44:59,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2059529315, now seen corresponding path program 1 times [2023-12-20 14:44:59,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:44:59,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280974360] [2023-12-20 14:44:59,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:59,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:44:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:59,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:44:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:59,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:44:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:59,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-12-20 14:44:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:59,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-12-20 14:44:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:59,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-12-20 14:44:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:44:59,829 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 14:44:59,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:44:59,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280974360] [2023-12-20 14:44:59,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280974360] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:44:59,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485479892] [2023-12-20 14:44:59,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:44:59,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:44:59,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:44:59,840 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 14:44:59,882 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 14:45:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 14:45:00,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:45:00,036 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 14:45:00,037 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 14:45:00,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485479892] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:00,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 14:45:00,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-20 14:45:00,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282293887] [2023-12-20 14:45:00,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:00,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 14:45:00,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:00,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 14:45:00,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 14:45:00,038 INFO L87 Difference]: Start difference. First operand 975 states and 1359 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 14:45:00,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:00,170 INFO L93 Difference]: Finished difference Result 1200 states and 1647 transitions. [2023-12-20 14:45:00,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 14:45:00,170 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 14:45:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:00,171 INFO L225 Difference]: With dead ends: 1200 [2023-12-20 14:45:00,171 INFO L226 Difference]: Without dead ends: 308 [2023-12-20 14:45:00,173 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 14:45:00,173 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 53 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:00,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1085 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 14:45:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-12-20 14:45:00,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2023-12-20 14:45:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 275 states have (on average 1.6327272727272728) internal successors, (449), 277 states have internal predecessors, (449), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-20 14:45:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 499 transitions. [2023-12-20 14:45:00,183 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 499 transitions. Word has length 92 [2023-12-20 14:45:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:00,183 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 499 transitions. [2023-12-20 14:45:00,183 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 14:45:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 499 transitions. [2023-12-20 14:45:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:00,205 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:00,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:00,213 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 14:45:00,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:45:00,411 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:00,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:00,411 INFO L85 PathProgramCache]: Analyzing trace with hash 423959296, now seen corresponding path program 1 times [2023-12-20 14:45:00,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:00,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926587718] [2023-12-20 14:45:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:00,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:00,611 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 14:45:00,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:00,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926587718] [2023-12-20 14:45:00,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926587718] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:00,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:00,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 14:45:00,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516465577] [2023-12-20 14:45:00,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:00,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 14:45:00,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:00,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 14:45:00,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 14:45:00,612 INFO L87 Difference]: Start difference. First operand 308 states and 499 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:45:02,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:02,301 INFO L93 Difference]: Finished difference Result 720 states and 1186 transitions. [2023-12-20 14:45:02,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 14:45:02,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:45:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:02,303 INFO L225 Difference]: With dead ends: 720 [2023-12-20 14:45:02,303 INFO L226 Difference]: Without dead ends: 418 [2023-12-20 14:45:02,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-20 14:45:02,304 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 848 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:02,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 569 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-20 14:45:02,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2023-12-20 14:45:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 308. [2023-12-20 14:45:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 275 states have (on average 1.6290909090909091) internal successors, (448), 277 states have internal predecessors, (448), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-20 14:45:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 498 transitions. [2023-12-20 14:45:02,333 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 498 transitions. Word has length 142 [2023-12-20 14:45:02,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:02,334 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 498 transitions. [2023-12-20 14:45:02,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:45:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 498 transitions. [2023-12-20 14:45:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:02,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:02,335 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:02,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-20 14:45:02,335 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:02,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:02,335 INFO L85 PathProgramCache]: Analyzing trace with hash -974994306, now seen corresponding path program 1 times [2023-12-20 14:45:02,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:02,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833516068] [2023-12-20 14:45:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:02,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:02,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:02,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:02,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:02,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:02,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:02,530 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 14:45:02,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:02,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833516068] [2023-12-20 14:45:02,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833516068] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:02,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:02,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 14:45:02,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608893793] [2023-12-20 14:45:02,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:02,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 14:45:02,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:02,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 14:45:02,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 14:45:02,532 INFO L87 Difference]: Start difference. First operand 308 states and 498 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:45:03,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:03,665 INFO L93 Difference]: Finished difference Result 712 states and 1169 transitions. [2023-12-20 14:45:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-20 14:45:03,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 142 [2023-12-20 14:45:03,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:03,667 INFO L225 Difference]: With dead ends: 712 [2023-12-20 14:45:03,667 INFO L226 Difference]: Without dead ends: 418 [2023-12-20 14:45:03,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-20 14:45:03,668 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 839 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:03,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 567 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 14:45:03,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2023-12-20 14:45:03,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 308. [2023-12-20 14:45:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 275 states have (on average 1.6254545454545455) internal successors, (447), 277 states have internal predecessors, (447), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-20 14:45:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 497 transitions. [2023-12-20 14:45:03,742 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 497 transitions. Word has length 142 [2023-12-20 14:45:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:03,742 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 497 transitions. [2023-12-20 14:45:03,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 14:45:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 497 transitions. [2023-12-20 14:45:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:03,744 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:03,744 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:03,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-20 14:45:03,744 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:03,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:03,745 INFO L85 PathProgramCache]: Analyzing trace with hash -540488708, now seen corresponding path program 1 times [2023-12-20 14:45:03,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:03,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287449742] [2023-12-20 14:45:03,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:03,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:03,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:03,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:03,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:03,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:03,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:03,994 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 14:45:03,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:03,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287449742] [2023-12-20 14:45:03,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287449742] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:03,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:03,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 14:45:03,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755054457] [2023-12-20 14:45:03,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:03,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 14:45:03,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:03,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 14:45:03,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-20 14:45:03,995 INFO L87 Difference]: Start difference. First operand 308 states and 497 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 4 states have internal predecessors, (131), 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 14:45:06,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:06,119 INFO L93 Difference]: Finished difference Result 1125 states and 1859 transitions. [2023-12-20 14:45:06,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 14:45:06,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 4 states have internal predecessors, (131), 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 142 [2023-12-20 14:45:06,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:06,122 INFO L225 Difference]: With dead ends: 1125 [2023-12-20 14:45:06,122 INFO L226 Difference]: Without dead ends: 834 [2023-12-20 14:45:06,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:45:06,124 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 1274 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1964 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:06,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 957 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1964 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-20 14:45:06,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-12-20 14:45:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 613. [2023-12-20 14:45:06,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 554 states have (on average 1.6371841155234657) internal successors, (907), 557 states have internal predecessors, (907), 45 states have call successors, (45), 13 states have call predecessors, (45), 13 states have return successors, (46), 43 states have call predecessors, (46), 43 states have call successors, (46) [2023-12-20 14:45:06,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 998 transitions. [2023-12-20 14:45:06,155 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 998 transitions. Word has length 142 [2023-12-20 14:45:06,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:06,156 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 998 transitions. [2023-12-20 14:45:06,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 4 states have internal predecessors, (131), 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 14:45:06,156 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 998 transitions. [2023-12-20 14:45:06,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:06,157 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:06,157 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:06,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-20 14:45:06,157 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:06,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:06,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1050462404, now seen corresponding path program 1 times [2023-12-20 14:45:06,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:06,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749319622] [2023-12-20 14:45:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:06,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:06,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:06,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:06,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:06,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:06,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:06,417 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 14:45:06,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:06,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749319622] [2023-12-20 14:45:06,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749319622] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:06,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:06,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:45:06,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139685706] [2023-12-20 14:45:06,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:06,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:45:06,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:06,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:45:06,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:45:06,419 INFO L87 Difference]: Start difference. First operand 613 states and 998 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:09,435 INFO L93 Difference]: Finished difference Result 1860 states and 3077 transitions. [2023-12-20 14:45:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:45:09,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 142 [2023-12-20 14:45:09,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:09,440 INFO L225 Difference]: With dead ends: 1860 [2023-12-20 14:45:09,440 INFO L226 Difference]: Without dead ends: 1264 [2023-12-20 14:45:09,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:45:09,442 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 1309 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 3196 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 1827 SdHoareTripleChecker+Invalid, 3257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 3196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:09,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1326 Valid, 1827 Invalid, 3257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 3196 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-20 14:45:09,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2023-12-20 14:45:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 895. [2023-12-20 14:45:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 810 states have (on average 1.6308641975308642) internal successors, (1321), 814 states have internal predecessors, (1321), 64 states have call successors, (64), 19 states have call predecessors, (64), 20 states have return successors, (67), 63 states have call predecessors, (67), 62 states have call successors, (67) [2023-12-20 14:45:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1452 transitions. [2023-12-20 14:45:09,510 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1452 transitions. Word has length 142 [2023-12-20 14:45:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:09,510 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1452 transitions. [2023-12-20 14:45:09,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1452 transitions. [2023-12-20 14:45:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:09,511 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:09,511 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:09,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-20 14:45:09,512 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:09,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:09,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1194095994, now seen corresponding path program 1 times [2023-12-20 14:45:09,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:09,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125910006] [2023-12-20 14:45:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:09,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:09,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:09,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:09,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:09,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:09,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:09,703 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 14:45:09,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:09,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125910006] [2023-12-20 14:45:09,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125910006] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:09,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:09,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:45:09,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966794612] [2023-12-20 14:45:09,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:09,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:45:09,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:09,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:45:09,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:45:09,705 INFO L87 Difference]: Start difference. First operand 895 states and 1452 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:11,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:11,107 INFO L93 Difference]: Finished difference Result 2154 states and 3563 transitions. [2023-12-20 14:45:11,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:45:11,108 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 142 [2023-12-20 14:45:11,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:11,113 INFO L225 Difference]: With dead ends: 2154 [2023-12-20 14:45:11,113 INFO L226 Difference]: Without dead ends: 1276 [2023-12-20 14:45:11,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:45:11,115 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 1012 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:11,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1030 Valid, 928 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-20 14:45:11,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2023-12-20 14:45:11,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 895. [2023-12-20 14:45:11,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 810 states have (on average 1.6271604938271604) internal successors, (1318), 814 states have internal predecessors, (1318), 64 states have call successors, (64), 19 states have call predecessors, (64), 20 states have return successors, (67), 63 states have call predecessors, (67), 62 states have call successors, (67) [2023-12-20 14:45:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1449 transitions. [2023-12-20 14:45:11,184 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1449 transitions. Word has length 142 [2023-12-20 14:45:11,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:11,184 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1449 transitions. [2023-12-20 14:45:11,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:11,184 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1449 transitions. [2023-12-20 14:45:11,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:11,185 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:11,185 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:11,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-20 14:45:11,186 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:11,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:11,186 INFO L85 PathProgramCache]: Analyzing trace with hash 101460792, now seen corresponding path program 1 times [2023-12-20 14:45:11,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:11,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59724906] [2023-12-20 14:45:11,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:11,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:11,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:11,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:11,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:11,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:11,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:11,339 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 14:45:11,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:11,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59724906] [2023-12-20 14:45:11,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59724906] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:11,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:11,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:45:11,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287525274] [2023-12-20 14:45:11,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:11,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:45:11,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:11,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:45:11,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:45:11,340 INFO L87 Difference]: Start difference. First operand 895 states and 1449 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:12,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:12,536 INFO L93 Difference]: Finished difference Result 2150 states and 3546 transitions. [2023-12-20 14:45:12,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:45:12,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 142 [2023-12-20 14:45:12,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:12,541 INFO L225 Difference]: With dead ends: 2150 [2023-12-20 14:45:12,541 INFO L226 Difference]: Without dead ends: 1272 [2023-12-20 14:45:12,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:45:12,543 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 1067 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:12,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1085 Valid, 780 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 14:45:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2023-12-20 14:45:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 895. [2023-12-20 14:45:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 810 states have (on average 1.623456790123457) internal successors, (1315), 814 states have internal predecessors, (1315), 64 states have call successors, (64), 19 states have call predecessors, (64), 20 states have return successors, (67), 63 states have call predecessors, (67), 62 states have call successors, (67) [2023-12-20 14:45:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1446 transitions. [2023-12-20 14:45:12,578 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1446 transitions. Word has length 142 [2023-12-20 14:45:12,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:12,579 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1446 transitions. [2023-12-20 14:45:12,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:12,579 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1446 transitions. [2023-12-20 14:45:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:12,580 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:12,580 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:12,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-20 14:45:12,580 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:12,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:12,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1180711494, now seen corresponding path program 1 times [2023-12-20 14:45:12,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:12,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092082103] [2023-12-20 14:45:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:12,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:12,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:12,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:12,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:12,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:12,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:12,778 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 14:45:12,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:12,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092082103] [2023-12-20 14:45:12,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092082103] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:12,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:12,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:45:12,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774558724] [2023-12-20 14:45:12,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:12,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:45:12,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:12,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:45:12,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:45:12,780 INFO L87 Difference]: Start difference. First operand 895 states and 1446 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:14,213 INFO L93 Difference]: Finished difference Result 2146 states and 3529 transitions. [2023-12-20 14:45:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:45:14,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 142 [2023-12-20 14:45:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:14,218 INFO L225 Difference]: With dead ends: 2146 [2023-12-20 14:45:14,219 INFO L226 Difference]: Without dead ends: 1268 [2023-12-20 14:45:14,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:45:14,221 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 934 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 1661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:14,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [952 Valid, 929 Invalid, 1661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-20 14:45:14,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2023-12-20 14:45:14,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 895. [2023-12-20 14:45:14,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 810 states have (on average 1.6197530864197531) internal successors, (1312), 814 states have internal predecessors, (1312), 64 states have call successors, (64), 19 states have call predecessors, (64), 20 states have return successors, (67), 63 states have call predecessors, (67), 62 states have call successors, (67) [2023-12-20 14:45:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1443 transitions. [2023-12-20 14:45:14,259 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1443 transitions. Word has length 142 [2023-12-20 14:45:14,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:14,259 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1443 transitions. [2023-12-20 14:45:14,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1443 transitions. [2023-12-20 14:45:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:14,260 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:14,260 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:14,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-20 14:45:14,261 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:14,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:14,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1271780088, now seen corresponding path program 1 times [2023-12-20 14:45:14,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:14,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575314591] [2023-12-20 14:45:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:14,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:14,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:14,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:14,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:14,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:14,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:14,440 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 14:45:14,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:14,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575314591] [2023-12-20 14:45:14,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575314591] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:14,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:14,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:45:14,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475721400] [2023-12-20 14:45:14,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:14,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:45:14,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:14,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:45:14,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:45:14,442 INFO L87 Difference]: Start difference. First operand 895 states and 1443 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:17,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:17,294 INFO L93 Difference]: Finished difference Result 2924 states and 4785 transitions. [2023-12-20 14:45:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:45:17,294 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 142 [2023-12-20 14:45:17,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:17,300 INFO L225 Difference]: With dead ends: 2924 [2023-12-20 14:45:17,300 INFO L226 Difference]: Without dead ends: 2046 [2023-12-20 14:45:17,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:45:17,302 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 1282 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 3100 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 3163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 3100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:17,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1299 Valid, 1825 Invalid, 3163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 3100 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-20 14:45:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2023-12-20 14:45:17,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1472. [2023-12-20 14:45:17,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1335 states have (on average 1.6127340823970038) internal successors, (2153), 1341 states have internal predecessors, (2153), 102 states have call successors, (102), 31 states have call predecessors, (102), 34 states have return successors, (113), 103 states have call predecessors, (113), 100 states have call successors, (113) [2023-12-20 14:45:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2368 transitions. [2023-12-20 14:45:17,357 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2368 transitions. Word has length 142 [2023-12-20 14:45:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:17,357 INFO L495 AbstractCegarLoop]: Abstraction has 1472 states and 2368 transitions. [2023-12-20 14:45:17,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2368 transitions. [2023-12-20 14:45:17,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:17,358 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:17,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:17,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-20 14:45:17,358 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:17,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:17,359 INFO L85 PathProgramCache]: Analyzing trace with hash -450222598, now seen corresponding path program 1 times [2023-12-20 14:45:17,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:17,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180462769] [2023-12-20 14:45:17,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:17,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:17,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:17,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:17,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:17,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:17,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:17,527 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 14:45:17,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:17,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180462769] [2023-12-20 14:45:17,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180462769] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:17,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:17,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:45:17,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024220748] [2023-12-20 14:45:17,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:17,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:45:17,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:17,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:45:17,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:45:17,529 INFO L87 Difference]: Start difference. First operand 1472 states and 2368 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:18,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:18,808 INFO L93 Difference]: Finished difference Result 3486 states and 5696 transitions. [2023-12-20 14:45:18,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:45:18,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 142 [2023-12-20 14:45:18,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:18,815 INFO L225 Difference]: With dead ends: 3486 [2023-12-20 14:45:18,815 INFO L226 Difference]: Without dead ends: 2031 [2023-12-20 14:45:18,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:45:18,818 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 1064 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:18,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1082 Valid, 780 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 14:45:18,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2023-12-20 14:45:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1472. [2023-12-20 14:45:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1335 states have (on average 1.6089887640449438) internal successors, (2148), 1341 states have internal predecessors, (2148), 102 states have call successors, (102), 31 states have call predecessors, (102), 34 states have return successors, (113), 103 states have call predecessors, (113), 100 states have call successors, (113) [2023-12-20 14:45:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2363 transitions. [2023-12-20 14:45:18,885 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2363 transitions. Word has length 142 [2023-12-20 14:45:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:18,886 INFO L495 AbstractCegarLoop]: Abstraction has 1472 states and 2363 transitions. [2023-12-20 14:45:18,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2363 transitions. [2023-12-20 14:45:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:18,887 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:18,887 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:18,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-20 14:45:18,887 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:18,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:18,887 INFO L85 PathProgramCache]: Analyzing trace with hash -782865736, now seen corresponding path program 1 times [2023-12-20 14:45:18,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:18,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510420880] [2023-12-20 14:45:18,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:18,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:18,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:18,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:19,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:19,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:19,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:19,060 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 14:45:19,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:19,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510420880] [2023-12-20 14:45:19,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510420880] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:19,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:19,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:45:19,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585098586] [2023-12-20 14:45:19,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:19,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:45:19,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:45:19,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:45:19,061 INFO L87 Difference]: Start difference. First operand 1472 states and 2363 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:21,980 INFO L93 Difference]: Finished difference Result 4991 states and 8114 transitions. [2023-12-20 14:45:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:45:21,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 142 [2023-12-20 14:45:21,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:21,994 INFO L225 Difference]: With dead ends: 4991 [2023-12-20 14:45:21,995 INFO L226 Difference]: Without dead ends: 3536 [2023-12-20 14:45:22,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:45:22,000 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 1274 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 3062 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 3125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 3062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:22,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 1825 Invalid, 3125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 3062 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-20 14:45:22,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2023-12-20 14:45:22,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2626. [2023-12-20 14:45:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2385 states have (on average 1.60167714884696) internal successors, (3820), 2395 states have internal predecessors, (3820), 178 states have call successors, (178), 55 states have call predecessors, (178), 62 states have return successors, (211), 183 states have call predecessors, (211), 176 states have call successors, (211) [2023-12-20 14:45:22,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 4209 transitions. [2023-12-20 14:45:22,147 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 4209 transitions. Word has length 142 [2023-12-20 14:45:22,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:22,148 INFO L495 AbstractCegarLoop]: Abstraction has 2626 states and 4209 transitions. [2023-12-20 14:45:22,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 4209 transitions. [2023-12-20 14:45:22,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:22,151 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:22,151 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:22,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-20 14:45:22,151 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:22,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:22,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1146066490, now seen corresponding path program 1 times [2023-12-20 14:45:22,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:22,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349228003] [2023-12-20 14:45:22,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:22,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:22,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:22,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:22,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:22,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:22,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:22,349 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 14:45:22,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:22,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349228003] [2023-12-20 14:45:22,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349228003] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:22,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:22,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:45:22,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905470602] [2023-12-20 14:45:22,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:22,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:45:22,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:22,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:45:22,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:45:22,351 INFO L87 Difference]: Start difference. First operand 2626 states and 4209 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:25,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:25,395 INFO L93 Difference]: Finished difference Result 9131 states and 14826 transitions. [2023-12-20 14:45:25,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:45:25,396 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 142 [2023-12-20 14:45:25,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:25,419 INFO L225 Difference]: With dead ends: 9131 [2023-12-20 14:45:25,419 INFO L226 Difference]: Without dead ends: 6522 [2023-12-20 14:45:25,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:45:25,429 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 1279 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 3044 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 3107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 3044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:25,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1296 Valid, 1825 Invalid, 3107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 3044 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-20 14:45:25,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6522 states. [2023-12-20 14:45:25,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6522 to 4939. [2023-12-20 14:45:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 4490 states have (on average 1.5968819599109132) internal successors, (7170), 4508 states have internal predecessors, (7170), 330 states have call successors, (330), 103 states have call predecessors, (330), 118 states have return successors, (425), 343 states have call predecessors, (425), 328 states have call successors, (425) [2023-12-20 14:45:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 7925 transitions. [2023-12-20 14:45:25,650 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 7925 transitions. Word has length 142 [2023-12-20 14:45:25,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:25,651 INFO L495 AbstractCegarLoop]: Abstraction has 4939 states and 7925 transitions. [2023-12-20 14:45:25,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:25,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 7925 transitions. [2023-12-20 14:45:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:25,655 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:25,655 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:25,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-20 14:45:25,655 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:25,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:25,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1147014536, now seen corresponding path program 1 times [2023-12-20 14:45:25,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:25,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76041602] [2023-12-20 14:45:25,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:25,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:25,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:25,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:25,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:25,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:25,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:25,839 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 14:45:25,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:25,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76041602] [2023-12-20 14:45:25,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76041602] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:25,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:25,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:45:25,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983990200] [2023-12-20 14:45:25,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:25,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:45:25,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:25,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:45:25,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:45:25,846 INFO L87 Difference]: Start difference. First operand 4939 states and 7925 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:29,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:29,297 INFO L93 Difference]: Finished difference Result 19440 states and 31586 transitions. [2023-12-20 14:45:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:45:29,298 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 142 [2023-12-20 14:45:29,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:29,349 INFO L225 Difference]: With dead ends: 19440 [2023-12-20 14:45:29,349 INFO L226 Difference]: Without dead ends: 14518 [2023-12-20 14:45:29,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:45:29,369 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 1718 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1746 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:29,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1746 Valid, 1182 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-20 14:45:29,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14518 states. [2023-12-20 14:45:29,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14518 to 9565. [2023-12-20 14:45:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9565 states, 8716 states have (on average 1.595915557595227) internal successors, (13910), 8750 states have internal predecessors, (13910), 618 states have call successors, (618), 199 states have call predecessors, (618), 230 states have return successors, (891), 647 states have call predecessors, (891), 616 states have call successors, (891) [2023-12-20 14:45:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9565 states to 9565 states and 15419 transitions. [2023-12-20 14:45:29,828 INFO L78 Accepts]: Start accepts. Automaton has 9565 states and 15419 transitions. Word has length 142 [2023-12-20 14:45:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:29,828 INFO L495 AbstractCegarLoop]: Abstraction has 9565 states and 15419 transitions. [2023-12-20 14:45:29,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:29,828 INFO L276 IsEmpty]: Start isEmpty. Operand 9565 states and 15419 transitions. [2023-12-20 14:45:29,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:29,835 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:29,835 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:29,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-20 14:45:29,836 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:29,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:29,836 INFO L85 PathProgramCache]: Analyzing trace with hash -675658186, now seen corresponding path program 1 times [2023-12-20 14:45:29,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:29,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895530590] [2023-12-20 14:45:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:29,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:29,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:29,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:29,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:30,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:30,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:30,014 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 14:45:30,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:30,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895530590] [2023-12-20 14:45:30,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895530590] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:30,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:30,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:45:30,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275051063] [2023-12-20 14:45:30,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:30,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:45:30,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:30,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:45:30,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:45:30,015 INFO L87 Difference]: Start difference. First operand 9565 states and 15419 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:34,151 INFO L93 Difference]: Finished difference Result 37600 states and 61338 transitions. [2023-12-20 14:45:34,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:45:34,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 142 [2023-12-20 14:45:34,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:34,237 INFO L225 Difference]: With dead ends: 37600 [2023-12-20 14:45:34,238 INFO L226 Difference]: Without dead ends: 28052 [2023-12-20 14:45:34,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:45:34,267 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 1355 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 3558 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1371 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 3623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:34,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1371 Valid, 1814 Invalid, 3623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3558 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-20 14:45:34,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28052 states. [2023-12-20 14:45:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28052 to 18494. [2023-12-20 14:45:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18494 states, 16861 states have (on average 1.5918391554474824) internal successors, (26840), 16927 states have internal predecessors, (26840), 1178 states have call successors, (1178), 391 states have call predecessors, (1178), 454 states have return successors, (1969), 1239 states have call predecessors, (1969), 1176 states have call successors, (1969) [2023-12-20 14:45:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18494 states to 18494 states and 29987 transitions. [2023-12-20 14:45:35,392 INFO L78 Accepts]: Start accepts. Automaton has 18494 states and 29987 transitions. Word has length 142 [2023-12-20 14:45:35,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:35,392 INFO L495 AbstractCegarLoop]: Abstraction has 18494 states and 29987 transitions. [2023-12-20 14:45:35,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 18494 states and 29987 transitions. [2023-12-20 14:45:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:35,403 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:35,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:35,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-20 14:45:35,403 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:35,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:35,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1971946168, now seen corresponding path program 1 times [2023-12-20 14:45:35,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:35,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159703051] [2023-12-20 14:45:35,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:35,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:35,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:35,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:35,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:35,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:35,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:35,580 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 14:45:35,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:35,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159703051] [2023-12-20 14:45:35,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159703051] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:35,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:35,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:45:35,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365605034] [2023-12-20 14:45:35,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:35,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:45:35,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:35,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:45:35,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:45:35,582 INFO L87 Difference]: Start difference. First operand 18494 states and 29987 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:40,241 INFO L93 Difference]: Finished difference Result 72511 states and 118928 transitions. [2023-12-20 14:45:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:45:40,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 142 [2023-12-20 14:45:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:40,486 INFO L225 Difference]: With dead ends: 72511 [2023-12-20 14:45:40,486 INFO L226 Difference]: Without dead ends: 54034 [2023-12-20 14:45:40,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:45:40,547 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 1566 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 2981 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1594 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:40,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1594 Valid, 1818 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2981 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-20 14:45:40,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54034 states. [2023-12-20 14:45:42,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54034 to 36671. [2023-12-20 14:45:42,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36671 states, 33502 states have (on average 1.5920840546833024) internal successors, (53338), 33632 states have internal predecessors, (53338), 2266 states have call successors, (2266), 775 states have call predecessors, (2266), 902 states have return successors, (4579), 2391 states have call predecessors, (4579), 2264 states have call successors, (4579) [2023-12-20 14:45:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36671 states to 36671 states and 60183 transitions. [2023-12-20 14:45:42,491 INFO L78 Accepts]: Start accepts. Automaton has 36671 states and 60183 transitions. Word has length 142 [2023-12-20 14:45:42,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:42,491 INFO L495 AbstractCegarLoop]: Abstraction has 36671 states and 60183 transitions. [2023-12-20 14:45:42,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 36671 states and 60183 transitions. [2023-12-20 14:45:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:42,510 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:42,510 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:42,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-20 14:45:42,511 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:42,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:42,511 INFO L85 PathProgramCache]: Analyzing trace with hash -159404554, now seen corresponding path program 1 times [2023-12-20 14:45:42,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:42,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819056352] [2023-12-20 14:45:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:42,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:42,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:42,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:42,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:42,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:42,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:42,674 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 14:45:42,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:42,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819056352] [2023-12-20 14:45:42,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819056352] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:42,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:42,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:45:42,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203071938] [2023-12-20 14:45:42,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:42,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:45:42,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:42,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:45:42,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:45:42,675 INFO L87 Difference]: Start difference. First operand 36671 states and 60183 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:49,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:45:49,563 INFO L93 Difference]: Finished difference Result 142270 states and 236054 transitions. [2023-12-20 14:45:49,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:45:49,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 142 [2023-12-20 14:45:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:45:50,064 INFO L225 Difference]: With dead ends: 142270 [2023-12-20 14:45:50,064 INFO L226 Difference]: Without dead ends: 105616 [2023-12-20 14:45:50,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:45:50,154 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 1336 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 3441 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 3506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-20 14:45:50,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 1818 Invalid, 3506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3441 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-20 14:45:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105616 states. [2023-12-20 14:45:54,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105616 to 73024. [2023-12-20 14:45:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73024 states, 66847 states have (on average 1.5925920385357608) internal successors, (106460), 67105 states have internal predecessors, (106460), 4378 states have call successors, (4378), 1543 states have call predecessors, (4378), 1798 states have return successors, (11193), 4631 states have call predecessors, (11193), 4376 states have call successors, (11193) [2023-12-20 14:45:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73024 states to 73024 states and 122031 transitions. [2023-12-20 14:45:54,776 INFO L78 Accepts]: Start accepts. Automaton has 73024 states and 122031 transitions. Word has length 142 [2023-12-20 14:45:54,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:45:54,777 INFO L495 AbstractCegarLoop]: Abstraction has 73024 states and 122031 transitions. [2023-12-20 14:45:54,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:45:54,777 INFO L276 IsEmpty]: Start isEmpty. Operand 73024 states and 122031 transitions. [2023-12-20 14:45:54,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:45:54,816 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:45:54,816 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:54,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-20 14:45:54,816 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:45:54,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:45:54,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1197989128, now seen corresponding path program 1 times [2023-12-20 14:45:54,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:45:54,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527963909] [2023-12-20 14:45:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:45:54,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:45:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:54,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:45:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:54,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:45:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:54,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:45:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:55,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:45:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:55,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:45:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:45:55,103 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 14:45:55,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:45:55,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527963909] [2023-12-20 14:45:55,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527963909] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:45:55,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:45:55,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:45:55,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015730170] [2023-12-20 14:45:55,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:45:55,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:45:55,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:45:55,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:45:55,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:45:55,105 INFO L87 Difference]: Start difference. First operand 73024 states and 122031 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:46:04,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:04,529 INFO L93 Difference]: Finished difference Result 279869 states and 472812 transitions. [2023-12-20 14:46:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:46:04,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 142 [2023-12-20 14:46:04,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:05,670 INFO L225 Difference]: With dead ends: 279869 [2023-12-20 14:46:05,670 INFO L226 Difference]: Without dead ends: 206862 [2023-12-20 14:46:05,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:46:05,897 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 1494 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 3021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:05,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1522 Valid, 1818 Invalid, 3021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-20 14:46:06,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206862 states. [2023-12-20 14:46:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206862 to 145729. [2023-12-20 14:46:14,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145729 states, 133664 states have (on average 1.5932337802250418) internal successors, (212958), 134178 states have internal predecessors, (212958), 8474 states have call successors, (8474), 3079 states have call predecessors, (8474), 3590 states have return successors, (28667), 8983 states have call predecessors, (28667), 8472 states have call successors, (28667) [2023-12-20 14:46:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145729 states to 145729 states and 250099 transitions. [2023-12-20 14:46:15,607 INFO L78 Accepts]: Start accepts. Automaton has 145729 states and 250099 transitions. Word has length 142 [2023-12-20 14:46:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:15,607 INFO L495 AbstractCegarLoop]: Abstraction has 145729 states and 250099 transitions. [2023-12-20 14:46:15,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:46:15,608 INFO L276 IsEmpty]: Start isEmpty. Operand 145729 states and 250099 transitions. [2023-12-20 14:46:15,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:46:15,693 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:15,693 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:46:15,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-20 14:46:15,694 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:15,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:15,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1123812790, now seen corresponding path program 1 times [2023-12-20 14:46:15,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:15,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481773458] [2023-12-20 14:46:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:15,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:15,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:46:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:15,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:46:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:15,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:46:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:15,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:46:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:15,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:46:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:15,851 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 14:46:15,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:15,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481773458] [2023-12-20 14:46:15,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481773458] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:15,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:15,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:46:15,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832174628] [2023-12-20 14:46:15,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:15,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:46:15,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:15,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:46:15,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:46:15,854 INFO L87 Difference]: Start difference. First operand 145729 states and 250099 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:46:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:24,769 INFO L93 Difference]: Finished difference Result 332570 states and 587479 transitions. [2023-12-20 14:46:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:46:24,769 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 142 [2023-12-20 14:46:24,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:26,030 INFO L225 Difference]: With dead ends: 332570 [2023-12-20 14:46:26,030 INFO L226 Difference]: Without dead ends: 186858 [2023-12-20 14:46:26,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:46:26,556 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 1071 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:26,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1089 Valid, 779 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 14:46:26,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186858 states. [2023-12-20 14:46:35,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186858 to 145729. [2023-12-20 14:46:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145729 states, 133664 states have (on average 1.5893957984199185) internal successors, (212445), 134178 states have internal predecessors, (212445), 8474 states have call successors, (8474), 3079 states have call predecessors, (8474), 3590 states have return successors, (28667), 8983 states have call predecessors, (28667), 8472 states have call successors, (28667) [2023-12-20 14:46:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145729 states to 145729 states and 249586 transitions. [2023-12-20 14:46:36,223 INFO L78 Accepts]: Start accepts. Automaton has 145729 states and 249586 transitions. Word has length 142 [2023-12-20 14:46:36,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:36,224 INFO L495 AbstractCegarLoop]: Abstraction has 145729 states and 249586 transitions. [2023-12-20 14:46:36,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:46:36,224 INFO L276 IsEmpty]: Start isEmpty. Operand 145729 states and 249586 transitions. [2023-12-20 14:46:36,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:46:36,303 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:36,303 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:46:36,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-20 14:46:36,303 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:36,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:36,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1018047688, now seen corresponding path program 1 times [2023-12-20 14:46:36,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:36,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616596250] [2023-12-20 14:46:36,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:36,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:36,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:46:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:36,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:46:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:36,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:46:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:36,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:46:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:36,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:46:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:36,540 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 14:46:36,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:36,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616596250] [2023-12-20 14:46:36,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616596250] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:36,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:36,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:46:36,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744056427] [2023-12-20 14:46:36,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:36,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:46:36,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:36,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:46:36,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:46:36,830 INFO L87 Difference]: Start difference. First operand 145729 states and 249586 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:46:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:52,552 INFO L93 Difference]: Finished difference Result 544570 states and 944362 transitions. [2023-12-20 14:46:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:46:52,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 142 [2023-12-20 14:46:52,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:54,385 INFO L225 Difference]: With dead ends: 544570 [2023-12-20 14:46:54,385 INFO L226 Difference]: Without dead ends: 398858 [2023-12-20 14:46:54,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:46:54,874 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 1306 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 3247 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 3312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:54,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1322 Valid, 1818 Invalid, 3312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3247 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-20 14:46:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398858 states. [2023-12-20 14:47:09,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398858 to 291651. [2023-12-20 14:47:10,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291651 states, 268066 states have (on average 1.5889855483351114) internal successors, (425953), 269092 states have internal predecessors, (425953), 16410 states have call successors, (16410), 6151 states have call predecessors, (16410), 7174 states have return successors, (76481), 17431 states have call predecessors, (76481), 16408 states have call successors, (76481) [2023-12-20 14:47:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291651 states to 291651 states and 518844 transitions. [2023-12-20 14:47:12,279 INFO L78 Accepts]: Start accepts. Automaton has 291651 states and 518844 transitions. Word has length 142 [2023-12-20 14:47:12,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:47:12,279 INFO L495 AbstractCegarLoop]: Abstraction has 291651 states and 518844 transitions. [2023-12-20 14:47:12,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 14:47:12,280 INFO L276 IsEmpty]: Start isEmpty. Operand 291651 states and 518844 transitions. [2023-12-20 14:47:12,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-20 14:47:12,434 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:47:12,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:47:12,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-20 14:47:12,434 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:47:12,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:47:12,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1641329290, now seen corresponding path program 1 times [2023-12-20 14:47:12,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:47:12,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588172036] [2023-12-20 14:47:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:47:12,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:47:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:12,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:47:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:12,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 14:47:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:12,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:47:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:12,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-20 14:47:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:12,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-12-20 14:47:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:12,921 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 14:47:12,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:47:12,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588172036] [2023-12-20 14:47:12,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588172036] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:47:12,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:47:12,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:47:12,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471677224] [2023-12-20 14:47:12,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:47:12,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:47:12,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:47:12,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:47:12,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:47:12,922 INFO L87 Difference]: Start difference. First operand 291651 states and 518844 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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)