/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.15.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 14:46:27,014 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 14:46:27,090 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 14:46:27,094 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 14:46:27,094 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 14:46:27,117 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 14:46:27,117 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 14:46:27,117 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 14:46:27,118 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 14:46:27,121 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 14:46:27,121 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 14:46:27,121 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 14:46:27,121 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 14:46:27,122 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 14:46:27,122 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 14:46:27,123 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 14:46:27,123 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 14:46:27,123 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 14:46:27,123 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 14:46:27,124 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 14:46:27,124 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 14:46:27,125 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 14:46:27,125 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 14:46:27,125 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 14:46:27,125 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 14:46:27,125 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 14:46:27,126 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 14:46:27,126 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 14:46:27,126 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 14:46:27,126 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 14:46:27,127 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 14:46:27,127 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 14:46:27,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 14:46:27,128 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 14:46:27,128 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 14:46:27,128 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 14:46:27,128 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 14:46:27,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 14:46:27,128 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 14:46:27,128 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 14:46:27,128 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 14:46:27,129 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 14:46:27,129 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 14:46:27,129 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 14:46:27,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 14:46:27,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 14:46:27,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 14:46:27,355 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 14:46:27,355 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 14:46:27,356 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c [2023-12-20 14:46:28,442 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 14:46:28,646 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 14:46:28,647 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c [2023-12-20 14:46:28,671 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e252d08/18a87c0be2bb4ffe911239f0e233f37b/FLAG42402e68b [2023-12-20 14:46:28,687 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e252d08/18a87c0be2bb4ffe911239f0e233f37b [2023-12-20 14:46:28,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 14:46:28,690 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 14:46:28,692 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 14:46:28,693 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 14:46:28,696 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 14:46:28,697 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 02:46:28" (1/1) ... [2023-12-20 14:46:28,697 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d62487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:46:28, skipping insertion in model container [2023-12-20 14:46:28,698 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 02:46:28" (1/1) ... [2023-12-20 14:46:28,739 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 14:46:28,851 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.15.cil.c[913,926] [2023-12-20 14:46:28,908 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.15.cil.c[5977,5990] [2023-12-20 14:46:29,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 14:46:29,016 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 14:46:29,024 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.15.cil.c[913,926] [2023-12-20 14:46:29,032 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.15.cil.c[5977,5990] [2023-12-20 14:46:29,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 14:46:29,115 INFO L206 MainTranslator]: Completed translation [2023-12-20 14:46:29,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:46:29 WrapperNode [2023-12-20 14:46:29,115 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 14:46:29,117 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 14:46:29,117 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 14:46:29,117 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 14:46:29,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:46:29" (1/1) ... [2023-12-20 14:46:29,141 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:46:29" (1/1) ... [2023-12-20 14:46:29,183 INFO L138 Inliner]: procedures = 74, calls = 88, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 1147 [2023-12-20 14:46:29,183 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 14:46:29,184 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 14:46:29,184 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 14:46:29,184 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 14:46:29,192 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:46:29" (1/1) ... [2023-12-20 14:46:29,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:46:29" (1/1) ... [2023-12-20 14:46:29,195 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:46:29" (1/1) ... [2023-12-20 14:46:29,207 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 14:46:29,208 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:46:29" (1/1) ... [2023-12-20 14:46:29,208 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:46:29" (1/1) ... [2023-12-20 14:46:29,222 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:46:29" (1/1) ... [2023-12-20 14:46:29,231 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:46:29" (1/1) ... [2023-12-20 14:46:29,233 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:46:29" (1/1) ... [2023-12-20 14:46:29,235 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:46:29" (1/1) ... [2023-12-20 14:46:29,239 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 14:46:29,240 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 14:46:29,240 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 14:46:29,240 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 14:46:29,241 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:46:29" (1/1) ... [2023-12-20 14:46:29,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 14:46:29,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:46:29,296 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 14:46:29,376 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 14:46:29,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 14:46:29,379 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-20 14:46:29,379 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-20 14:46:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-12-20 14:46:29,381 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-12-20 14:46:29,381 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-20 14:46:29,381 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-20 14:46:29,381 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-20 14:46:29,381 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-20 14:46:29,382 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-20 14:46:29,382 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-20 14:46:29,382 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-20 14:46:29,382 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-20 14:46:29,382 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-20 14:46:29,382 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-20 14:46:29,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 14:46:29,382 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-20 14:46:29,382 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-20 14:46:29,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 14:46:29,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 14:46:29,382 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-20 14:46:29,382 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-20 14:46:29,383 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-12-20 14:46:29,383 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-12-20 14:46:29,526 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 14:46:29,532 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 14:46:30,189 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 14:46:30,272 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 14:46:30,272 INFO L309 CfgBuilder]: Removed 20 assume(true) statements. [2023-12-20 14:46:30,273 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 02:46:30 BoogieIcfgContainer [2023-12-20 14:46:30,273 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 14:46:30,274 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 14:46:30,274 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 14:46:30,277 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 14:46:30,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 02:46:28" (1/3) ... [2023-12-20 14:46:30,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b3832b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 02:46:30, skipping insertion in model container [2023-12-20 14:46:30,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 02:46:29" (2/3) ... [2023-12-20 14:46:30,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b3832b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 02:46:30, skipping insertion in model container [2023-12-20 14:46:30,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 02:46:30" (3/3) ... [2023-12-20 14:46:30,278 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.15.cil.c [2023-12-20 14:46:30,289 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 14:46:30,289 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-20 14:46:30,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 14:46:30,366 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;@3c31c36c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 14:46:30,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-20 14:46:30,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 440 states, 392 states have (on average 1.7295918367346939) internal successors, (678), 399 states have internal predecessors, (678), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2023-12-20 14:46:30,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-20 14:46:30,380 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:30,381 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 14:46:30,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:30,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1740532851, now seen corresponding path program 1 times [2023-12-20 14:46:30,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:30,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666719289] [2023-12-20 14:46:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:30,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:30,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:46:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:30,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:46:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:30,688 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 14:46:30,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:30,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666719289] [2023-12-20 14:46:30,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666719289] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:30,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:30,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:46:30,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251428721] [2023-12-20 14:46:30,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:30,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:46:30,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:30,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:46:30,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:46:30,733 INFO L87 Difference]: Start difference. First operand has 440 states, 392 states have (on average 1.7295918367346939) internal successors, (678), 399 states have internal predecessors, (678), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) 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 14:46:31,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:31,489 INFO L93 Difference]: Finished difference Result 864 states and 1464 transitions. [2023-12-20 14:46:31,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:46:31,491 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 14:46:31,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:31,500 INFO L225 Difference]: With dead ends: 864 [2023-12-20 14:46:31,500 INFO L226 Difference]: Without dead ends: 442 [2023-12-20 14:46:31,504 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 14:46:31,506 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 382 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:31,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 961 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 14:46:31,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2023-12-20 14:46:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 434. [2023-12-20 14:46:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 389 states have (on average 1.6195372750642674) internal successors, (630), 393 states have internal predecessors, (630), 35 states have call successors, (35), 10 states have call predecessors, (35), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-12-20 14:46:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 696 transitions. [2023-12-20 14:46:31,553 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 696 transitions. Word has length 37 [2023-12-20 14:46:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:31,554 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 696 transitions. [2023-12-20 14:46:31,554 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 14:46:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 696 transitions. [2023-12-20 14:46:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-20 14:46:31,556 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:31,556 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 14:46:31,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 14:46:31,556 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:31,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:31,557 INFO L85 PathProgramCache]: Analyzing trace with hash 503450447, now seen corresponding path program 1 times [2023-12-20 14:46:31,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:31,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801239692] [2023-12-20 14:46:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:31,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:31,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:46:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:31,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:46:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:31,611 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 14:46:31,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:31,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801239692] [2023-12-20 14:46:31,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801239692] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:31,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:31,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:46:31,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130487337] [2023-12-20 14:46:31,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:31,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:46:31,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:31,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:46:31,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:46:31,614 INFO L87 Difference]: Start difference. First operand 434 states and 696 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 14:46:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:32,019 INFO L93 Difference]: Finished difference Result 553 states and 868 transitions. [2023-12-20 14:46:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:46:32,020 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 14:46:32,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:32,022 INFO L225 Difference]: With dead ends: 553 [2023-12-20 14:46:32,022 INFO L226 Difference]: Without dead ends: 497 [2023-12-20 14:46:32,023 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 14:46:32,024 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 946 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:32,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 736 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 14:46:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2023-12-20 14:46:32,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 491. [2023-12-20 14:46:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 439 states have (on average 1.5922551252847381) internal successors, (699), 444 states have internal predecessors, (699), 39 states have call successors, (39), 12 states have call predecessors, (39), 11 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-12-20 14:46:32,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 779 transitions. [2023-12-20 14:46:32,044 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 779 transitions. Word has length 37 [2023-12-20 14:46:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:32,045 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 779 transitions. [2023-12-20 14:46:32,045 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 14:46:32,045 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 779 transitions. [2023-12-20 14:46:32,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 14:46:32,046 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:32,046 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 14:46:32,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 14:46:32,046 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:32,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:32,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1800984901, now seen corresponding path program 1 times [2023-12-20 14:46:32,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:32,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245358678] [2023-12-20 14:46:32,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:32,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:32,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:46:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:32,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:46:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:32,089 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 14:46:32,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:32,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245358678] [2023-12-20 14:46:32,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245358678] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:32,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:32,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:46:32,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020247225] [2023-12-20 14:46:32,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:32,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:46:32,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:32,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:46:32,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:46:32,091 INFO L87 Difference]: Start difference. First operand 491 states and 779 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 14:46:32,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:32,474 INFO L93 Difference]: Finished difference Result 725 states and 1123 transitions. [2023-12-20 14:46:32,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:46:32,474 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 14:46:32,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:32,477 INFO L225 Difference]: With dead ends: 725 [2023-12-20 14:46:32,477 INFO L226 Difference]: Without dead ends: 614 [2023-12-20 14:46:32,478 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 14:46:32,479 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 964 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:32,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [991 Valid, 742 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 14:46:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2023-12-20 14:46:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 591. [2023-12-20 14:46:32,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 526 states have (on average 1.553231939163498) internal successors, (817), 532 states have internal predecessors, (817), 47 states have call successors, (47), 16 states have call predecessors, (47), 16 states have return successors, (55), 43 states have call predecessors, (55), 43 states have call successors, (55) [2023-12-20 14:46:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 919 transitions. [2023-12-20 14:46:32,534 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 919 transitions. Word has length 38 [2023-12-20 14:46:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:32,535 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 919 transitions. [2023-12-20 14:46:32,535 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 14:46:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 919 transitions. [2023-12-20 14:46:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-20 14:46:32,536 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:32,537 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 14:46:32,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 14:46:32,537 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:32,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:32,537 INFO L85 PathProgramCache]: Analyzing trace with hash -335941947, now seen corresponding path program 1 times [2023-12-20 14:46:32,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:32,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417610447] [2023-12-20 14:46:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:32,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:32,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:46:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:32,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-12-20 14:46:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:32,575 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 14:46:32,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:32,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417610447] [2023-12-20 14:46:32,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417610447] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:32,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:32,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:46:32,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279842737] [2023-12-20 14:46:32,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:32,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:46:32,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:32,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:46:32,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:46:32,577 INFO L87 Difference]: Start difference. First operand 591 states and 919 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 14:46:33,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:33,039 INFO L93 Difference]: Finished difference Result 1011 states and 1500 transitions. [2023-12-20 14:46:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:46:33,040 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 14:46:33,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:33,044 INFO L225 Difference]: With dead ends: 1011 [2023-12-20 14:46:33,044 INFO L226 Difference]: Without dead ends: 800 [2023-12-20 14:46:33,044 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 14:46:33,045 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 365 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:33,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 1056 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 14:46:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2023-12-20 14:46:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 696. [2023-12-20 14:46:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 619 states have (on average 1.5282714054927302) internal successors, (946), 627 states have internal predecessors, (946), 53 states have call successors, (53), 22 states have call predecessors, (53), 22 states have return successors, (61), 47 states have call predecessors, (61), 49 states have call successors, (61) [2023-12-20 14:46:33,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1060 transitions. [2023-12-20 14:46:33,087 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1060 transitions. Word has length 39 [2023-12-20 14:46:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:33,087 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 1060 transitions. [2023-12-20 14:46:33,087 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 14:46:33,087 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1060 transitions. [2023-12-20 14:46:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-20 14:46:33,090 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:33,091 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 14:46:33,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-20 14:46:33,092 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:33,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:33,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2727102, now seen corresponding path program 1 times [2023-12-20 14:46:33,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:33,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721026273] [2023-12-20 14:46:33,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:33,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:33,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:46:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:33,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-20 14:46:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:33,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-20 14:46:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:33,177 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 14:46:33,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:33,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721026273] [2023-12-20 14:46:33,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721026273] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:33,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:33,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:46:33,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67988701] [2023-12-20 14:46:33,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:33,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:46:33,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:33,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:46:33,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:46:33,179 INFO L87 Difference]: Start difference. First operand 696 states and 1060 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 14:46:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:33,655 INFO L93 Difference]: Finished difference Result 1001 states and 1482 transitions. [2023-12-20 14:46:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:46:33,656 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 14:46:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:33,659 INFO L225 Difference]: With dead ends: 1001 [2023-12-20 14:46:33,659 INFO L226 Difference]: Without dead ends: 790 [2023-12-20 14:46:33,659 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 14:46:33,660 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 350 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:33,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 1101 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 14:46:33,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2023-12-20 14:46:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 756. [2023-12-20 14:46:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 670 states have (on average 1.5029850746268656) internal successors, (1007), 679 states have internal predecessors, (1007), 58 states have call successors, (58), 25 states have call predecessors, (58), 26 states have return successors, (70), 52 states have call predecessors, (70), 54 states have call successors, (70) [2023-12-20 14:46:33,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1135 transitions. [2023-12-20 14:46:33,689 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1135 transitions. Word has length 54 [2023-12-20 14:46:33,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:33,690 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 1135 transitions. [2023-12-20 14:46:33,690 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 14:46:33,690 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1135 transitions. [2023-12-20 14:46:33,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-20 14:46:33,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:33,691 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 14:46:33,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-20 14:46:33,691 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:33,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:33,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1531208578, now seen corresponding path program 1 times [2023-12-20 14:46:33,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:33,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812324498] [2023-12-20 14:46:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:33,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:33,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:46:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:33,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-20 14:46:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:33,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-12-20 14:46:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:33,739 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 14:46:33,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:33,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812324498] [2023-12-20 14:46:33,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812324498] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:33,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:33,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:46:33,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822682876] [2023-12-20 14:46:33,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:33,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:46:33,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:33,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:46:33,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:46:33,741 INFO L87 Difference]: Start difference. First operand 756 states and 1135 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 14:46:34,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:34,140 INFO L93 Difference]: Finished difference Result 1245 states and 1795 transitions. [2023-12-20 14:46:34,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:46:34,140 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 14:46:34,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:34,144 INFO L225 Difference]: With dead ends: 1245 [2023-12-20 14:46:34,144 INFO L226 Difference]: Without dead ends: 910 [2023-12-20 14:46:34,145 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 14:46:34,146 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 950 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:34,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 754 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 14:46:34,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2023-12-20 14:46:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 861. [2023-12-20 14:46:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 762 states have (on average 1.4698162729658792) internal successors, (1120), 772 states have internal predecessors, (1120), 65 states have call successors, (65), 30 states have call predecessors, (65), 32 states have return successors, (81), 59 states have call predecessors, (81), 61 states have call successors, (81) [2023-12-20 14:46:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1266 transitions. [2023-12-20 14:46:34,184 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1266 transitions. Word has length 59 [2023-12-20 14:46:34,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:34,184 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1266 transitions. [2023-12-20 14:46:34,184 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 14:46:34,184 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1266 transitions. [2023-12-20 14:46:34,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 14:46:34,185 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:34,185 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, 1, 1, 1, 1, 1, 1] [2023-12-20 14:46:34,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-20 14:46:34,186 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:34,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:34,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1753515059, now seen corresponding path program 1 times [2023-12-20 14:46:34,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:34,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104302384] [2023-12-20 14:46:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:34,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:34,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:46:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:34,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:46:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:34,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:46:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 14:46:34,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:34,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104302384] [2023-12-20 14:46:34,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104302384] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:34,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:34,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 14:46:34,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639666113] [2023-12-20 14:46:34,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:34,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 14:46:34,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:34,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 14:46:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-20 14:46:34,258 INFO L87 Difference]: Start difference. First operand 861 states and 1266 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 14:46:34,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:34,827 INFO L93 Difference]: Finished difference Result 1333 states and 1912 transitions. [2023-12-20 14:46:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:46:34,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 14:46:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:34,832 INFO L225 Difference]: With dead ends: 1333 [2023-12-20 14:46:34,832 INFO L226 Difference]: Without dead ends: 938 [2023-12-20 14:46:34,833 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 14:46:34,834 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 303 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:34,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1378 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 14:46:34,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2023-12-20 14:46:34,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 865. [2023-12-20 14:46:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 765 states have (on average 1.45359477124183) internal successors, (1112), 776 states have internal predecessors, (1112), 65 states have call successors, (65), 30 states have call predecessors, (65), 33 states have return successors, (81), 59 states have call predecessors, (81), 61 states have call successors, (81) [2023-12-20 14:46:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1258 transitions. [2023-12-20 14:46:34,891 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1258 transitions. Word has length 60 [2023-12-20 14:46:34,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:34,892 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 1258 transitions. [2023-12-20 14:46:34,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 14:46:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1258 transitions. [2023-12-20 14:46:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 14:46:34,893 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:34,893 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, 1, 1, 1, 1, 1, 1] [2023-12-20 14:46:34,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-20 14:46:34,894 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:34,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:34,894 INFO L85 PathProgramCache]: Analyzing trace with hash 44124557, now seen corresponding path program 1 times [2023-12-20 14:46:34,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:34,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089824997] [2023-12-20 14:46:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:34,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:35,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:46:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:35,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:46:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:35,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:46:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 14:46:35,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:35,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089824997] [2023-12-20 14:46:35,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089824997] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:46:35,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182358771] [2023-12-20 14:46:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:35,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:46:35,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:46:35,074 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 14:46:35,106 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 14:46:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:35,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 14:46:35,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:46:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 14:46:35,245 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 14:46:35,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182358771] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:35,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 14:46:35,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-20 14:46:35,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634712523] [2023-12-20 14:46:35,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:35,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 14:46:35,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:35,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 14:46:35,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-20 14:46:35,246 INFO L87 Difference]: Start difference. First operand 865 states and 1258 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 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 14:46:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:35,328 INFO L93 Difference]: Finished difference Result 1262 states and 1795 transitions. [2023-12-20 14:46:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 14:46:35,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 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 14:46:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:35,331 INFO L225 Difference]: With dead ends: 1262 [2023-12-20 14:46:35,331 INFO L226 Difference]: Without dead ends: 863 [2023-12-20 14:46:35,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-20 14:46:35,333 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 66 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:35,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1301 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 14:46:35,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2023-12-20 14:46:35,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 825. [2023-12-20 14:46:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 731 states have (on average 1.4445964432284542) internal successors, (1056), 742 states have internal predecessors, (1056), 61 states have call successors, (61), 28 states have call predecessors, (61), 31 states have return successors, (75), 55 states have call predecessors, (75), 57 states have call successors, (75) [2023-12-20 14:46:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1192 transitions. [2023-12-20 14:46:35,357 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1192 transitions. Word has length 60 [2023-12-20 14:46:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:35,358 INFO L495 AbstractCegarLoop]: Abstraction has 825 states and 1192 transitions. [2023-12-20 14:46:35,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 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 14:46:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1192 transitions. [2023-12-20 14:46:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 14:46:35,359 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:35,359 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 14:46:35,379 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 14:46:35,566 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 14:46:35,567 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:35,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:35,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1114548236, now seen corresponding path program 1 times [2023-12-20 14:46:35,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:35,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440856984] [2023-12-20 14:46:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:35,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:35,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:46:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:35,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:46:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:35,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:46:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:35,619 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 14:46:35,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:35,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440856984] [2023-12-20 14:46:35,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440856984] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:46:35,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991635820] [2023-12-20 14:46:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:35,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:46:35,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:46:35,638 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 14:46:35,666 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 14:46:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:35,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-20 14:46:35,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:46:35,808 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 14:46:35,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 14:46:35,840 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 14:46:35,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991635820] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-20 14:46:35,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-20 14:46:35,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2023-12-20 14:46:35,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627330243] [2023-12-20 14:46:35,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:35,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:46:35,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:35,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:46:35,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:46:35,842 INFO L87 Difference]: Start difference. First operand 825 states and 1192 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 14:46:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:35,999 INFO L93 Difference]: Finished difference Result 870 states and 1247 transitions. [2023-12-20 14:46:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 14:46:36,000 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 14:46:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:36,003 INFO L225 Difference]: With dead ends: 870 [2023-12-20 14:46:36,003 INFO L226 Difference]: Without dead ends: 867 [2023-12-20 14:46:36,003 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 14:46:36,004 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 1262 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:36,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1262 Valid, 710 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 14:46:36,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2023-12-20 14:46:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 824. [2023-12-20 14:46:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 731 states have (on average 1.441860465116279) internal successors, (1054), 741 states have internal predecessors, (1054), 60 states have call successors, (60), 28 states have call predecessors, (60), 31 states have return successors, (75), 55 states have call predecessors, (75), 57 states have call successors, (75) [2023-12-20 14:46:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1189 transitions. [2023-12-20 14:46:36,032 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1189 transitions. Word has length 60 [2023-12-20 14:46:36,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:36,032 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 1189 transitions. [2023-12-20 14:46:36,032 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 14:46:36,033 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1189 transitions. [2023-12-20 14:46:36,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-20 14:46:36,033 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:36,033 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 14:46:36,041 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 14:46:36,239 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 14:46:36,239 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:36,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:36,240 INFO L85 PathProgramCache]: Analyzing trace with hash 189760741, now seen corresponding path program 1 times [2023-12-20 14:46:36,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:36,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053836474] [2023-12-20 14:46:36,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:36,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:36,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:46:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:36,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:46:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:36,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-20 14:46:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:36,295 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 14:46:36,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:36,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053836474] [2023-12-20 14:46:36,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053836474] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:46:36,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010363213] [2023-12-20 14:46:36,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:36,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:46:36,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:46:36,297 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 14:46:36,308 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 14:46:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:36,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-20 14:46:36,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:46:36,598 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 14:46:36,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 14:46:36,648 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 14:46:36,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010363213] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 14:46:36,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 14:46:36,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2023-12-20 14:46:36,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581861020] [2023-12-20 14:46:36,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 14:46:36,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-20 14:46:36,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:36,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-20 14:46:36,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-20 14:46:36,650 INFO L87 Difference]: Start difference. First operand 824 states and 1189 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 14:46:37,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:37,736 INFO L93 Difference]: Finished difference Result 1890 states and 2585 transitions. [2023-12-20 14:46:37,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-20 14:46:37,736 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 14:46:37,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:37,743 INFO L225 Difference]: With dead ends: 1890 [2023-12-20 14:46:37,743 INFO L226 Difference]: Without dead ends: 1534 [2023-12-20 14:46:37,744 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 14:46:37,745 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 1155 mSDsluCounter, 2355 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 2799 SdHoareTripleChecker+Invalid, 2554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:37,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 2799 Invalid, 2554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-20 14:46:37,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2023-12-20 14:46:37,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1143. [2023-12-20 14:46:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1013 states have (on average 1.3879565646594274) internal successors, (1406), 1030 states have internal predecessors, (1406), 79 states have call successors, (79), 41 states have call predecessors, (79), 49 states have return successors, (106), 72 states have call predecessors, (106), 76 states have call successors, (106) [2023-12-20 14:46:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1591 transitions. [2023-12-20 14:46:37,859 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1591 transitions. Word has length 61 [2023-12-20 14:46:37,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:37,859 INFO L495 AbstractCegarLoop]: Abstraction has 1143 states and 1591 transitions. [2023-12-20 14:46:37,859 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 14:46:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1591 transitions. [2023-12-20 14:46:37,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-20 14:46:37,872 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:37,872 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 14:46:37,894 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 14:46:38,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:46:38,073 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:38,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:38,074 INFO L85 PathProgramCache]: Analyzing trace with hash 126117954, now seen corresponding path program 1 times [2023-12-20 14:46:38,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:38,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141212229] [2023-12-20 14:46:38,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:38,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:38,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:46:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:38,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:46:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:38,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-20 14:46:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:38,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-12-20 14:46:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:38,135 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 14:46:38,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:38,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141212229] [2023-12-20 14:46:38,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141212229] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:38,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:38,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 14:46:38,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142369252] [2023-12-20 14:46:38,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:38,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 14:46:38,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:38,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 14:46:38,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-20 14:46:38,138 INFO L87 Difference]: Start difference. First operand 1143 states and 1591 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 14:46:38,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:38,454 INFO L93 Difference]: Finished difference Result 1745 states and 2354 transitions. [2023-12-20 14:46:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 14:46:38,454 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 14:46:38,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:38,466 INFO L225 Difference]: With dead ends: 1745 [2023-12-20 14:46:38,466 INFO L226 Difference]: Without dead ends: 1150 [2023-12-20 14:46:38,468 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 14:46:38,468 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 961 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:38,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [989 Valid, 765 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 14:46:38,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2023-12-20 14:46:38,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1079. [2023-12-20 14:46:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 956 states have (on average 1.387029288702929) internal successors, (1326), 973 states have internal predecessors, (1326), 76 states have call successors, (76), 38 states have call predecessors, (76), 45 states have return successors, (101), 68 states have call predecessors, (101), 73 states have call successors, (101) [2023-12-20 14:46:38,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1503 transitions. [2023-12-20 14:46:38,552 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1503 transitions. Word has length 78 [2023-12-20 14:46:38,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:38,562 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1503 transitions. [2023-12-20 14:46:38,563 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 14:46:38,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1503 transitions. [2023-12-20 14:46:38,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 14:46:38,568 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:38,568 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 14:46:38,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-20 14:46:38,568 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:38,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:38,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1172774086, now seen corresponding path program 1 times [2023-12-20 14:46:38,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:38,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692246050] [2023-12-20 14:46:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:38,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 14:46:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:38,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-12-20 14:46:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:38,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-12-20 14:46:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:38,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-12-20 14:46:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:38,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-12-20 14:46:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:38,697 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 14:46:38,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:38,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692246050] [2023-12-20 14:46:38,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692246050] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 14:46:38,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370031338] [2023-12-20 14:46:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:38,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:46:38,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 14:46:38,713 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 14:46:38,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 14:46:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:38,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 14:46:38,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 14:46:38,872 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 14:46:38,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 14:46:38,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370031338] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:38,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 14:46:38,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-20 14:46:38,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477791979] [2023-12-20 14:46:38,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:38,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 14:46:38,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 14:46:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-20 14:46:38,874 INFO L87 Difference]: Start difference. First operand 1079 states and 1503 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 14:46:38,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:38,955 INFO L93 Difference]: Finished difference Result 1362 states and 1854 transitions. [2023-12-20 14:46:38,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 14:46:38,955 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 14:46:38,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:38,956 INFO L225 Difference]: With dead ends: 1362 [2023-12-20 14:46:38,957 INFO L226 Difference]: Without dead ends: 375 [2023-12-20 14:46:38,958 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 14:46:38,958 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 54 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:38,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1293 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 14:46:38,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-12-20 14:46:38,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2023-12-20 14:46:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 339 states have (on average 1.640117994100295) internal successors, (556), 341 states have internal predecessors, (556), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-12-20 14:46:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 612 transitions. [2023-12-20 14:46:38,968 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 612 transitions. Word has length 92 [2023-12-20 14:46:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:38,968 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 612 transitions. [2023-12-20 14:46:38,968 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 14:46:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 612 transitions. [2023-12-20 14:46:38,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:46:38,969 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:38,970 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, 1, 1, 1, 1, 1, 1, 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 14:46:38,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-20 14:46:39,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 14:46:39,190 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:39,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:39,190 INFO L85 PathProgramCache]: Analyzing trace with hash -734965434, now seen corresponding path program 1 times [2023-12-20 14:46:39,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:39,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883930529] [2023-12-20 14:46:39,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:39,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:39,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:46:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:39,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:46:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:39,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:46:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:39,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:46:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:39,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:46:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:39,430 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 14:46:39,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:39,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883930529] [2023-12-20 14:46:39,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883930529] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:39,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:39,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:46:39,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795974469] [2023-12-20 14:46:39,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:39,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:46:39,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:39,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:46:39,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:46:39,432 INFO L87 Difference]: Start difference. First operand 375 states and 612 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:46:42,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:42,074 INFO L93 Difference]: Finished difference Result 949 states and 1583 transitions. [2023-12-20 14:46:42,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 14:46:42,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:46:42,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:42,078 INFO L225 Difference]: With dead ends: 949 [2023-12-20 14:46:42,078 INFO L226 Difference]: Without dead ends: 581 [2023-12-20 14:46:42,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-12-20 14:46:42,079 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1336 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1364 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 2281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:42,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1364 Valid, 1232 Invalid, 2281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2216 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-20 14:46:42,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2023-12-20 14:46:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 377. [2023-12-20 14:46:42,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 341 states have (on average 1.6334310850439884) internal successors, (557), 343 states have internal predecessors, (557), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-12-20 14:46:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 613 transitions. [2023-12-20 14:46:42,100 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 613 transitions. Word has length 172 [2023-12-20 14:46:42,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:42,100 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 613 transitions. [2023-12-20 14:46:42,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:46:42,101 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 613 transitions. [2023-12-20 14:46:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:46:42,102 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:42,102 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, 1, 1, 1, 1, 1, 1, 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 14:46:42,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-20 14:46:42,102 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:42,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:42,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1407827642, now seen corresponding path program 1 times [2023-12-20 14:46:42,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:42,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015759982] [2023-12-20 14:46:42,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:42,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:42,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:46:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:42,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:46:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:42,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:46:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:42,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:46:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:42,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:46:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:42,302 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 14:46:42,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:42,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015759982] [2023-12-20 14:46:42,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015759982] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:42,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:42,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:46:42,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654609844] [2023-12-20 14:46:42,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:42,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:46:42,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:42,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:46:42,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:46:42,304 INFO L87 Difference]: Start difference. First operand 377 states and 613 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:46:44,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:44,651 INFO L93 Difference]: Finished difference Result 917 states and 1527 transitions. [2023-12-20 14:46:44,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 14:46:44,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:46:44,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:44,654 INFO L225 Difference]: With dead ends: 917 [2023-12-20 14:46:44,654 INFO L226 Difference]: Without dead ends: 555 [2023-12-20 14:46:44,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-12-20 14:46:44,656 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1192 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:44,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 1228 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2260 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-20 14:46:44,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2023-12-20 14:46:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 379. [2023-12-20 14:46:44,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 343 states have (on average 1.6268221574344024) internal successors, (558), 345 states have internal predecessors, (558), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-12-20 14:46:44,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 614 transitions. [2023-12-20 14:46:44,690 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 614 transitions. Word has length 172 [2023-12-20 14:46:44,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:44,690 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 614 transitions. [2023-12-20 14:46:44,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:46:44,690 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 614 transitions. [2023-12-20 14:46:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:46:44,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:44,692 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, 1, 1, 1, 1, 1, 1, 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 14:46:44,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-20 14:46:44,708 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:44,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:44,709 INFO L85 PathProgramCache]: Analyzing trace with hash -654678006, now seen corresponding path program 1 times [2023-12-20 14:46:44,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:44,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751800029] [2023-12-20 14:46:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:44,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:44,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:46:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:44,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:46:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:45,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:46:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:45,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:46:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:45,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:46:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:45,038 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 14:46:45,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:45,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751800029] [2023-12-20 14:46:45,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751800029] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:45,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:45,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-20 14:46:45,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656204210] [2023-12-20 14:46:45,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:45,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-20 14:46:45,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:45,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-20 14:46:45,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-20 14:46:45,040 INFO L87 Difference]: Start difference. First operand 379 states and 614 transitions. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 4 states have internal predecessors, (161), 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 14:46:47,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:47,786 INFO L93 Difference]: Finished difference Result 1406 states and 2326 transitions. [2023-12-20 14:46:47,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 14:46:47,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 4 states have internal predecessors, (161), 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 172 [2023-12-20 14:46:47,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:47,789 INFO L225 Difference]: With dead ends: 1406 [2023-12-20 14:46:47,789 INFO L226 Difference]: Without dead ends: 1047 [2023-12-20 14:46:47,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:46:47,791 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 1597 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1617 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:47,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1617 Valid, 1147 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-20 14:46:47,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2023-12-20 14:46:47,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 758. [2023-12-20 14:46:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 693 states have (on average 1.6378066378066378) internal successors, (1135), 696 states have internal predecessors, (1135), 51 states have call successors, (51), 13 states have call predecessors, (51), 13 states have return successors, (52), 49 states have call predecessors, (52), 49 states have call successors, (52) [2023-12-20 14:46:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1238 transitions. [2023-12-20 14:46:47,818 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1238 transitions. Word has length 172 [2023-12-20 14:46:47,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:47,819 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 1238 transitions. [2023-12-20 14:46:47,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 4 states have internal predecessors, (161), 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 14:46:47,819 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1238 transitions. [2023-12-20 14:46:47,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:46:47,820 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:47,820 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, 1, 1, 1, 1, 1, 1, 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 14:46:47,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-20 14:46:47,820 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:47,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:47,820 INFO L85 PathProgramCache]: Analyzing trace with hash 350427270, now seen corresponding path program 1 times [2023-12-20 14:46:47,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:47,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906366100] [2023-12-20 14:46:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:47,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:47,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:46:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:47,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:46:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:48,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:46:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:48,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:46:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:48,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:46:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:48,044 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 14:46:48,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:48,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906366100] [2023-12-20 14:46:48,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906366100] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:48,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:48,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:46:48,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021251020] [2023-12-20 14:46:48,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:48,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:46:48,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:48,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:46:48,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:46:48,046 INFO L87 Difference]: Start difference. First operand 758 states and 1238 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:46:51,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:51,829 INFO L93 Difference]: Finished difference Result 2329 states and 3860 transitions. [2023-12-20 14:46:51,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:46:51,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:46:51,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:51,837 INFO L225 Difference]: With dead ends: 2329 [2023-12-20 14:46:51,837 INFO L226 Difference]: Without dead ends: 1591 [2023-12-20 14:46:51,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:46:51,840 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 1634 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 4019 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1654 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 4086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:51,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1654 Valid, 2188 Invalid, 4086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4019 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-20 14:46:51,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2023-12-20 14:46:51,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1108. [2023-12-20 14:46:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1014 states have (on average 1.631163708086785) internal successors, (1654), 1018 states have internal predecessors, (1654), 73 states have call successors, (73), 19 states have call predecessors, (73), 20 states have return successors, (76), 72 states have call predecessors, (76), 71 states have call successors, (76) [2023-12-20 14:46:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1803 transitions. [2023-12-20 14:46:51,892 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1803 transitions. Word has length 172 [2023-12-20 14:46:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:51,892 INFO L495 AbstractCegarLoop]: Abstraction has 1108 states and 1803 transitions. [2023-12-20 14:46:51,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:46:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1803 transitions. [2023-12-20 14:46:51,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:46:51,894 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:51,894 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, 1, 1, 1, 1, 1, 1, 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 14:46:51,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-20 14:46:51,895 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:51,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash 736289672, now seen corresponding path program 1 times [2023-12-20 14:46:51,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:51,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262017786] [2023-12-20 14:46:51,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:51,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:52,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:46:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:52,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:46:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:52,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:46:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:52,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:46:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:52,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:46:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:52,313 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 14:46:52,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:52,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262017786] [2023-12-20 14:46:52,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262017786] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:52,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:52,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:46:52,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119586749] [2023-12-20 14:46:52,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:52,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:46:52,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:52,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:46:52,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:46:52,314 INFO L87 Difference]: Start difference. First operand 1108 states and 1803 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:46:56,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:56,217 INFO L93 Difference]: Finished difference Result 3684 states and 6095 transitions. [2023-12-20 14:46:56,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:46:56,218 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:46:56,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:56,226 INFO L225 Difference]: With dead ends: 3684 [2023-12-20 14:46:56,226 INFO L226 Difference]: Without dead ends: 2596 [2023-12-20 14:46:56,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:46:56,229 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 1632 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 4015 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 2186 SdHoareTripleChecker+Invalid, 4084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 4015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:56,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1652 Valid, 2186 Invalid, 4084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 4015 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-20 14:46:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2023-12-20 14:46:56,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1809. [2023-12-20 14:46:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1657 states have (on average 1.6252263126131563) internal successors, (2693), 1663 states have internal predecessors, (2693), 117 states have call successors, (117), 31 states have call predecessors, (117), 34 states have return successors, (128), 118 states have call predecessors, (128), 115 states have call successors, (128) [2023-12-20 14:46:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 2938 transitions. [2023-12-20 14:46:56,303 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 2938 transitions. Word has length 172 [2023-12-20 14:46:56,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:56,303 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 2938 transitions. [2023-12-20 14:46:56,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:46:56,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 2938 transitions. [2023-12-20 14:46:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:46:56,305 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:56,305 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, 1, 1, 1, 1, 1, 1, 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 14:46:56,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-20 14:46:56,305 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:56,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:56,305 INFO L85 PathProgramCache]: Analyzing trace with hash 471642182, now seen corresponding path program 1 times [2023-12-20 14:46:56,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:56,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93863446] [2023-12-20 14:46:56,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:56,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:56,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:46:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:56,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:46:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:56,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:46:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:56,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:46:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:56,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:46:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:56,522 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 14:46:56,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:56,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93863446] [2023-12-20 14:46:56,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93863446] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:56,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:56,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:46:56,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110915480] [2023-12-20 14:46:56,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:56,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:46:56,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:56,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:46:56,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:46:56,524 INFO L87 Difference]: Start difference. First operand 1809 states and 2938 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:46:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:46:58,017 INFO L93 Difference]: Finished difference Result 4373 states and 7221 transitions. [2023-12-20 14:46:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:46:58,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:46:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:46:58,026 INFO L225 Difference]: With dead ends: 4373 [2023-12-20 14:46:58,026 INFO L226 Difference]: Without dead ends: 2584 [2023-12-20 14:46:58,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:46:58,031 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1335 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 14:46:58,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 944 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 14:46:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2023-12-20 14:46:58,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1809. [2023-12-20 14:46:58,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1657 states have (on average 1.6222088111044055) internal successors, (2688), 1663 states have internal predecessors, (2688), 117 states have call successors, (117), 31 states have call predecessors, (117), 34 states have return successors, (128), 118 states have call predecessors, (128), 115 states have call successors, (128) [2023-12-20 14:46:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 2933 transitions. [2023-12-20 14:46:58,117 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 2933 transitions. Word has length 172 [2023-12-20 14:46:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:46:58,117 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 2933 transitions. [2023-12-20 14:46:58,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:46:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 2933 transitions. [2023-12-20 14:46:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:46:58,118 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:46:58,118 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, 1, 1, 1, 1, 1, 1, 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 14:46:58,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-20 14:46:58,118 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:46:58,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:46:58,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1892199480, now seen corresponding path program 1 times [2023-12-20 14:46:58,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:46:58,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295597057] [2023-12-20 14:46:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:46:58,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:46:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:58,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:46:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:58,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:46:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:58,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:46:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:58,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:46:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:58,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:46:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:46:58,307 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 14:46:58,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:46:58,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295597057] [2023-12-20 14:46:58,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295597057] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:46:58,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:46:58,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:46:58,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460630135] [2023-12-20 14:46:58,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:46:58,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:46:58,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:46:58,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:46:58,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:46:58,310 INFO L87 Difference]: Start difference. First operand 1809 states and 2933 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:00,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:47:00,039 INFO L93 Difference]: Finished difference Result 4362 states and 7185 transitions. [2023-12-20 14:47:00,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:47:00,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:47:00,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:47:00,069 INFO L225 Difference]: With dead ends: 4362 [2023-12-20 14:47:00,069 INFO L226 Difference]: Without dead ends: 2573 [2023-12-20 14:47:00,072 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 14:47:00,073 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 1257 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-20 14:47:00,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1278 Valid, 1121 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-20 14:47:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2023-12-20 14:47:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 1809. [2023-12-20 14:47:00,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1657 states have (on average 1.6191913095956547) internal successors, (2683), 1663 states have internal predecessors, (2683), 117 states have call successors, (117), 31 states have call predecessors, (117), 34 states have return successors, (128), 118 states have call predecessors, (128), 115 states have call successors, (128) [2023-12-20 14:47:00,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 2928 transitions. [2023-12-20 14:47:00,146 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 2928 transitions. Word has length 172 [2023-12-20 14:47:00,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:47:00,147 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 2928 transitions. [2023-12-20 14:47:00,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:00,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 2928 transitions. [2023-12-20 14:47:00,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:47:00,148 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:47:00,148 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, 1, 1, 1, 1, 1, 1, 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 14:47:00,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-20 14:47:00,150 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:47:00,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:47:00,150 INFO L85 PathProgramCache]: Analyzing trace with hash 4779978, now seen corresponding path program 1 times [2023-12-20 14:47:00,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:47:00,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948973360] [2023-12-20 14:47:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:47:00,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:47:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:00,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:47:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:00,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:47:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:00,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:47:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:00,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:47:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:00,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:47:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:00,411 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 14:47:00,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:47:00,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948973360] [2023-12-20 14:47:00,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948973360] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:47:00,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:47:00,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:47:00,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215281067] [2023-12-20 14:47:00,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:47:00,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:47:00,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:47:00,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:47:00,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:47:00,413 INFO L87 Difference]: Start difference. First operand 1809 states and 2928 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:04,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:47:04,362 INFO L93 Difference]: Finished difference Result 6264 states and 10276 transitions. [2023-12-20 14:47:04,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:47:04,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:47:04,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:47:04,378 INFO L225 Difference]: With dead ends: 6264 [2023-12-20 14:47:04,378 INFO L226 Difference]: Without dead ends: 4475 [2023-12-20 14:47:04,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:47:04,384 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 1619 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 3933 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1639 SdHoareTripleChecker+Valid, 2186 SdHoareTripleChecker+Invalid, 4002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-20 14:47:04,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1639 Valid, 2186 Invalid, 4002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3933 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-20 14:47:04,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4475 states. [2023-12-20 14:47:04,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4475 to 3226. [2023-12-20 14:47:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 2958 states have (on average 1.6139283299526708) internal successors, (4774), 2968 states have internal predecessors, (4774), 205 states have call successors, (205), 55 states have call predecessors, (205), 62 states have return successors, (238), 210 states have call predecessors, (238), 203 states have call successors, (238) [2023-12-20 14:47:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 5217 transitions. [2023-12-20 14:47:04,579 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 5217 transitions. Word has length 172 [2023-12-20 14:47:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:47:04,579 INFO L495 AbstractCegarLoop]: Abstraction has 3226 states and 5217 transitions. [2023-12-20 14:47:04,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 5217 transitions. [2023-12-20 14:47:04,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:47:04,582 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:47:04,582 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, 1, 1, 1, 1, 1, 1, 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 14:47:04,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-20 14:47:04,583 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:47:04,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:47:04,583 INFO L85 PathProgramCache]: Analyzing trace with hash 343067528, now seen corresponding path program 1 times [2023-12-20 14:47:04,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:47:04,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005429620] [2023-12-20 14:47:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:47:04,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:47:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:04,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:47:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:04,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:47:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:04,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:47:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:04,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:47:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:04,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:47:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:04,800 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 14:47:04,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:47:04,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005429620] [2023-12-20 14:47:04,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005429620] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:47:04,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:47:04,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:47:04,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548420484] [2023-12-20 14:47:04,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:47:04,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:47:04,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:47:04,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:47:04,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:47:04,802 INFO L87 Difference]: Start difference. First operand 3226 states and 5217 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:06,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:47:06,670 INFO L93 Difference]: Finished difference Result 7708 states and 12646 transitions. [2023-12-20 14:47:06,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:47:06,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:47:06,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:47:06,692 INFO L225 Difference]: With dead ends: 7708 [2023-12-20 14:47:06,692 INFO L226 Difference]: Without dead ends: 4502 [2023-12-20 14:47:06,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:47:06,703 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1166 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-20 14:47:06,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1187 Valid, 1122 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1999 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-20 14:47:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4502 states. [2023-12-20 14:47:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4502 to 3226. [2023-12-20 14:47:06,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 2958 states have (on average 1.6108857336037863) internal successors, (4765), 2968 states have internal predecessors, (4765), 205 states have call successors, (205), 55 states have call predecessors, (205), 62 states have return successors, (238), 210 states have call predecessors, (238), 203 states have call successors, (238) [2023-12-20 14:47:06,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 5208 transitions. [2023-12-20 14:47:06,831 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 5208 transitions. Word has length 172 [2023-12-20 14:47:06,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:47:06,831 INFO L495 AbstractCegarLoop]: Abstraction has 3226 states and 5208 transitions. [2023-12-20 14:47:06,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:06,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 5208 transitions. [2023-12-20 14:47:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:47:06,833 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:47:06,833 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, 1, 1, 1, 1, 1, 1, 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 14:47:06,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-20 14:47:06,833 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:47:06,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:47:06,834 INFO L85 PathProgramCache]: Analyzing trace with hash 769622026, now seen corresponding path program 1 times [2023-12-20 14:47:06,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:47:06,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681446986] [2023-12-20 14:47:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:47:06,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:47:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:06,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:47:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:06,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:47:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:07,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:47:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:07,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:47:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:07,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:47:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:07,038 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 14:47:07,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:47:07,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681446986] [2023-12-20 14:47:07,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681446986] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:47:07,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:47:07,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:47:07,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661524879] [2023-12-20 14:47:07,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:47:07,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:47:07,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:47:07,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:47:07,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:47:07,039 INFO L87 Difference]: Start difference. First operand 3226 states and 5208 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:11,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:47:11,083 INFO L93 Difference]: Finished difference Result 11451 states and 18709 transitions. [2023-12-20 14:47:11,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:47:11,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:47:11,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:47:11,174 INFO L225 Difference]: With dead ends: 11451 [2023-12-20 14:47:11,175 INFO L226 Difference]: Without dead ends: 8245 [2023-12-20 14:47:11,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:47:11,196 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 1611 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 3895 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 2186 SdHoareTripleChecker+Invalid, 3964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-20 14:47:11,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1631 Valid, 2186 Invalid, 3964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3895 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-20 14:47:11,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8245 states. [2023-12-20 14:47:11,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8245 to 6070. [2023-12-20 14:47:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6070 states, 5570 states have (on average 1.6062836624775583) internal successors, (8947), 5588 states have internal predecessors, (8947), 381 states have call successors, (381), 103 states have call predecessors, (381), 118 states have return successors, (476), 394 states have call predecessors, (476), 379 states have call successors, (476) [2023-12-20 14:47:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6070 states to 6070 states and 9804 transitions. [2023-12-20 14:47:11,642 INFO L78 Accepts]: Start accepts. Automaton has 6070 states and 9804 transitions. Word has length 172 [2023-12-20 14:47:11,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:47:11,642 INFO L495 AbstractCegarLoop]: Abstraction has 6070 states and 9804 transitions. [2023-12-20 14:47:11,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:11,643 INFO L276 IsEmpty]: Start isEmpty. Operand 6070 states and 9804 transitions. [2023-12-20 14:47:11,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:47:11,676 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:47:11,676 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, 1, 1, 1, 1, 1, 1, 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 14:47:11,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-20 14:47:11,677 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:47:11,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:47:11,677 INFO L85 PathProgramCache]: Analyzing trace with hash 229192520, now seen corresponding path program 1 times [2023-12-20 14:47:11,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:47:11,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983911539] [2023-12-20 14:47:11,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:47:11,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:47:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:11,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:47:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:11,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:47:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:11,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:47:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:11,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:47:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:12,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:47:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:12,015 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 14:47:12,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:47:12,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983911539] [2023-12-20 14:47:12,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983911539] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:47:12,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:47:12,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:47:12,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849345769] [2023-12-20 14:47:12,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:47:12,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:47:12,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:47:12,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:47:12,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:47:12,029 INFO L87 Difference]: Start difference. First operand 6070 states and 9804 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:15,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:47:15,818 INFO L93 Difference]: Finished difference Result 21841 states and 35707 transitions. [2023-12-20 14:47:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:47:15,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:47:15,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:47:15,866 INFO L225 Difference]: With dead ends: 21841 [2023-12-20 14:47:15,866 INFO L226 Difference]: Without dead ends: 15791 [2023-12-20 14:47:15,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:47:15,885 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 1610 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 3882 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1630 SdHoareTripleChecker+Valid, 2186 SdHoareTripleChecker+Invalid, 3951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-20 14:47:15,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1630 Valid, 2186 Invalid, 3951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3882 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-20 14:47:15,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15791 states. [2023-12-20 14:47:16,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15791 to 11771. [2023-12-20 14:47:16,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11771 states, 10807 states have (on average 1.6034977329508653) internal successors, (17329), 10841 states have internal predecessors, (17329), 733 states have call successors, (733), 199 states have call predecessors, (733), 230 states have return successors, (1006), 762 states have call predecessors, (1006), 731 states have call successors, (1006) [2023-12-20 14:47:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11771 states to 11771 states and 19068 transitions. [2023-12-20 14:47:16,381 INFO L78 Accepts]: Start accepts. Automaton has 11771 states and 19068 transitions. Word has length 172 [2023-12-20 14:47:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:47:16,382 INFO L495 AbstractCegarLoop]: Abstraction has 11771 states and 19068 transitions. [2023-12-20 14:47:16,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:16,382 INFO L276 IsEmpty]: Start isEmpty. Operand 11771 states and 19068 transitions. [2023-12-20 14:47:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:47:16,387 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:47:16,388 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, 1, 1, 1, 1, 1, 1, 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 14:47:16,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-20 14:47:16,388 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:47:16,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:47:16,389 INFO L85 PathProgramCache]: Analyzing trace with hash 73211978, now seen corresponding path program 1 times [2023-12-20 14:47:16,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:47:16,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121051501] [2023-12-20 14:47:16,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:47:16,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:47:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:16,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:47:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:16,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:47:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:16,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:47:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:16,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:47:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:16,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:47:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:16,619 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 14:47:16,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:47:16,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121051501] [2023-12-20 14:47:16,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121051501] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:47:16,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:47:16,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:47:16,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081417084] [2023-12-20 14:47:16,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:47:16,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:47:16,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:47:16,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:47:16,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:47:16,621 INFO L87 Difference]: Start difference. First operand 11771 states and 19068 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:47:20,393 INFO L93 Difference]: Finished difference Result 42620 states and 69893 transitions. [2023-12-20 14:47:20,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:47:20,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:47:20,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:47:20,464 INFO L225 Difference]: With dead ends: 42620 [2023-12-20 14:47:20,464 INFO L226 Difference]: Without dead ends: 30869 [2023-12-20 14:47:20,488 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 14:47:20,489 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 1609 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 3869 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1629 SdHoareTripleChecker+Valid, 2186 SdHoareTripleChecker+Invalid, 3938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-20 14:47:20,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1629 Valid, 2186 Invalid, 3938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3869 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-20 14:47:20,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30869 states. [2023-12-20 14:47:21,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30869 to 23204. [2023-12-20 14:47:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23204 states, 21312 states have (on average 1.6018674924924925) internal successors, (34139), 21378 states have internal predecessors, (34139), 1437 states have call successors, (1437), 391 states have call predecessors, (1437), 454 states have return successors, (2228), 1498 states have call predecessors, (2228), 1435 states have call successors, (2228) [2023-12-20 14:47:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23204 states to 23204 states and 37804 transitions. [2023-12-20 14:47:21,748 INFO L78 Accepts]: Start accepts. Automaton has 23204 states and 37804 transitions. Word has length 172 [2023-12-20 14:47:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:47:21,749 INFO L495 AbstractCegarLoop]: Abstraction has 23204 states and 37804 transitions. [2023-12-20 14:47:21,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 23204 states and 37804 transitions. [2023-12-20 14:47:21,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:47:21,759 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:47:21,759 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, 1, 1, 1, 1, 1, 1, 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 14:47:21,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-20 14:47:21,759 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:47:21,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:47:21,760 INFO L85 PathProgramCache]: Analyzing trace with hash 483822344, now seen corresponding path program 1 times [2023-12-20 14:47:21,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:47:21,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349402086] [2023-12-20 14:47:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:47:21,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:47:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:21,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:47:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:21,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:47:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:22,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:47:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:22,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:47:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:22,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:47:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:22,037 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 14:47:22,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:47:22,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349402086] [2023-12-20 14:47:22,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349402086] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:47:22,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:47:22,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:47:22,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461927391] [2023-12-20 14:47:22,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:47:22,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:47:22,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:47:22,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:47:22,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:47:22,039 INFO L87 Difference]: Start difference. First operand 23204 states and 37804 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:24,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:47:24,675 INFO L93 Difference]: Finished difference Result 54544 states and 90257 transitions. [2023-12-20 14:47:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 14:47:24,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:47:24,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:47:24,780 INFO L225 Difference]: With dead ends: 54544 [2023-12-20 14:47:24,780 INFO L226 Difference]: Without dead ends: 31360 [2023-12-20 14:47:24,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-20 14:47:24,838 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1172 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 2019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-20 14:47:24,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1193 Valid, 1122 Invalid, 2019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-20 14:47:24,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31360 states. [2023-12-20 14:47:26,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31360 to 23204. [2023-12-20 14:47:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23204 states, 21312 states have (on average 1.5988175675675675) internal successors, (34074), 21378 states have internal predecessors, (34074), 1437 states have call successors, (1437), 391 states have call predecessors, (1437), 454 states have return successors, (2228), 1498 states have call predecessors, (2228), 1435 states have call successors, (2228) [2023-12-20 14:47:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23204 states to 23204 states and 37739 transitions. [2023-12-20 14:47:26,201 INFO L78 Accepts]: Start accepts. Automaton has 23204 states and 37739 transitions. Word has length 172 [2023-12-20 14:47:26,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:47:26,202 INFO L495 AbstractCegarLoop]: Abstraction has 23204 states and 37739 transitions. [2023-12-20 14:47:26,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:26,202 INFO L276 IsEmpty]: Start isEmpty. Operand 23204 states and 37739 transitions. [2023-12-20 14:47:26,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:47:26,212 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:47:26,212 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, 1, 1, 1, 1, 1, 1, 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 14:47:26,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-20 14:47:26,213 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:47:26,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:47:26,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1304047478, now seen corresponding path program 1 times [2023-12-20 14:47:26,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:47:26,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615185065] [2023-12-20 14:47:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:47:26,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:47:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:26,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:47:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:26,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:47:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:26,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:47:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:26,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:47:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:26,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:47:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:26,405 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 14:47:26,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:47:26,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615185065] [2023-12-20 14:47:26,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615185065] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:47:26,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:47:26,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:47:26,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604983178] [2023-12-20 14:47:26,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:47:26,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:47:26,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:47:26,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:47:26,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:47:26,407 INFO L87 Difference]: Start difference. First operand 23204 states and 37739 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:31,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:47:31,398 INFO L93 Difference]: Finished difference Result 84047 states and 138279 transitions. [2023-12-20 14:47:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 14:47:31,399 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:47:31,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:47:31,784 INFO L225 Difference]: With dead ends: 84047 [2023-12-20 14:47:31,784 INFO L226 Difference]: Without dead ends: 60863 [2023-12-20 14:47:31,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-20 14:47:31,900 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 1705 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 3195 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1725 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 3306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-20 14:47:31,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1725 Valid, 1416 Invalid, 3306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3195 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-20 14:47:31,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60863 states. [2023-12-20 14:47:34,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60863 to 46263. [2023-12-20 14:47:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46263 states, 42515 states have (on average 1.5975538045395743) internal successors, (67920), 42645 states have internal predecessors, (67920), 2845 states have call successors, (2845), 775 states have call predecessors, (2845), 902 states have return successors, (5158), 2970 states have call predecessors, (5158), 2843 states have call successors, (5158) [2023-12-20 14:47:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46263 states to 46263 states and 75923 transitions. [2023-12-20 14:47:34,264 INFO L78 Accepts]: Start accepts. Automaton has 46263 states and 75923 transitions. Word has length 172 [2023-12-20 14:47:34,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:47:34,264 INFO L495 AbstractCegarLoop]: Abstraction has 46263 states and 75923 transitions. [2023-12-20 14:47:34,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 46263 states and 75923 transitions. [2023-12-20 14:47:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:47:34,285 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:47:34,285 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, 1, 1, 1, 1, 1, 1, 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 14:47:34,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-20 14:47:34,285 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:47:34,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:47:34,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1234399604, now seen corresponding path program 1 times [2023-12-20 14:47:34,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:47:34,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345230708] [2023-12-20 14:47:34,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:47:34,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:47:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:34,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:47:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:34,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:47:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:34,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:47:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:34,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:47:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:34,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:47:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:34,493 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 14:47:34,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:47:34,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345230708] [2023-12-20 14:47:34,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345230708] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:47:34,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:47:34,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:47:34,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047235106] [2023-12-20 14:47:34,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:47:34,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:47:34,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:47:34,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:47:34,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:47:34,494 INFO L87 Difference]: Start difference. First operand 46263 states and 75923 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:41,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:47:41,837 INFO L93 Difference]: Finished difference Result 189184 states and 312899 transitions. [2023-12-20 14:47:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:47:41,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:47:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:47:42,363 INFO L225 Difference]: With dead ends: 189184 [2023-12-20 14:47:42,364 INFO L226 Difference]: Without dead ends: 142941 [2023-12-20 14:47:42,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:47:42,528 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 2071 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 3789 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2105 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 3861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 3789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-20 14:47:42,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2105 Valid, 2179 Invalid, 3861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 3789 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-20 14:47:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142941 states. [2023-12-20 14:47:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142941 to 92248. [2023-12-20 14:47:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92248 states, 84916 states have (on average 1.5976494418013096) internal successors, (135666), 85174 states have internal predecessors, (135666), 5533 states have call successors, (5533), 1543 states have call predecessors, (5533), 1798 states have return successors, (12348), 5786 states have call predecessors, (12348), 5531 states have call successors, (12348) [2023-12-20 14:47:47,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92248 states to 92248 states and 153547 transitions. [2023-12-20 14:47:47,196 INFO L78 Accepts]: Start accepts. Automaton has 92248 states and 153547 transitions. Word has length 172 [2023-12-20 14:47:47,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:47:47,197 INFO L495 AbstractCegarLoop]: Abstraction has 92248 states and 153547 transitions. [2023-12-20 14:47:47,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:47,197 INFO L276 IsEmpty]: Start isEmpty. Operand 92248 states and 153547 transitions. [2023-12-20 14:47:47,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:47:47,280 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:47:47,280 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, 1, 1, 1, 1, 1, 1, 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 14:47:47,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-20 14:47:47,280 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:47:47,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:47:47,281 INFO L85 PathProgramCache]: Analyzing trace with hash -816510902, now seen corresponding path program 1 times [2023-12-20 14:47:47,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:47:47,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125265808] [2023-12-20 14:47:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:47:47,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:47:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:47,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:47:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:47,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:47:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:47,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:47:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:47,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:47:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:47,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:47:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:47:47,519 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 14:47:47,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:47:47,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125265808] [2023-12-20 14:47:47,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125265808] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:47:47,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:47:47,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:47:47,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901659378] [2023-12-20 14:47:47,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:47:47,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:47:47,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:47:47,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:47:47,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:47:47,521 INFO L87 Difference]: Start difference. First operand 92248 states and 153547 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:47:59,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:47:59,314 INFO L93 Difference]: Finished difference Result 373855 states and 626809 transitions. [2023-12-20 14:47:59,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:47:59,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:47:59,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:48:00,455 INFO L225 Difference]: With dead ends: 373855 [2023-12-20 14:48:00,455 INFO L226 Difference]: Without dead ends: 281627 [2023-12-20 14:48:00,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:48:00,692 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 1710 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 4508 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1729 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 4579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 4508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-12-20 14:48:00,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1729 Valid, 2175 Invalid, 4579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 4508 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-12-20 14:48:00,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281627 states. [2023-12-20 14:48:10,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281627 to 182169. [2023-12-20 14:48:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182169 states, 167797 states have (on average 1.5961429584557532) internal successors, (267828), 168311 states have internal predecessors, (267828), 10781 states have call successors, (10781), 3079 states have call predecessors, (10781), 3590 states have return successors, (30974), 11290 states have call predecessors, (30974), 10779 states have call successors, (30974) [2023-12-20 14:48:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182169 states to 182169 states and 309583 transitions. [2023-12-20 14:48:11,668 INFO L78 Accepts]: Start accepts. Automaton has 182169 states and 309583 transitions. Word has length 172 [2023-12-20 14:48:11,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:48:11,668 INFO L495 AbstractCegarLoop]: Abstraction has 182169 states and 309583 transitions. [2023-12-20 14:48:11,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:48:11,668 INFO L276 IsEmpty]: Start isEmpty. Operand 182169 states and 309583 transitions. [2023-12-20 14:48:11,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:48:11,737 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:48:11,737 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, 1, 1, 1, 1, 1, 1, 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 14:48:11,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-20 14:48:11,737 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:48:11,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:48:11,738 INFO L85 PathProgramCache]: Analyzing trace with hash 582442700, now seen corresponding path program 1 times [2023-12-20 14:48:11,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:48:11,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549503300] [2023-12-20 14:48:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:48:11,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:48:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:48:11,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:48:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:48:11,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:48:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:48:11,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:48:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:48:11,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:48:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:48:11,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:48:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:48:11,973 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 14:48:11,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:48:11,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549503300] [2023-12-20 14:48:11,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549503300] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:48:11,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:48:11,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:48:11,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282640931] [2023-12-20 14:48:11,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:48:11,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:48:11,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:48:11,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:48:11,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:48:11,975 INFO L87 Difference]: Start difference. First operand 182169 states and 309583 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:48:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 14:48:31,001 INFO L93 Difference]: Finished difference Result 733470 states and 1254719 transitions. [2023-12-20 14:48:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 14:48:31,001 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 172 [2023-12-20 14:48:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 14:48:33,907 INFO L225 Difference]: With dead ends: 733470 [2023-12-20 14:48:33,907 INFO L226 Difference]: Without dead ends: 551321 [2023-12-20 14:48:34,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-20 14:48:34,610 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 1999 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 3763 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2033 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 3835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 3763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-20 14:48:34,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2033 Valid, 2179 Invalid, 3835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 3763 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-20 14:48:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551321 states. [2023-12-20 14:48:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551321 to 364058. [2023-12-20 14:48:53,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364058 states, 335862 states have (on average 1.5966259952004096) internal successors, (536246), 336888 states have internal predecessors, (536246), 21021 states have call successors, (21021), 6151 states have call predecessors, (21021), 7174 states have return successors, (81092), 22042 states have call predecessors, (81092), 21019 states have call successors, (81092) [2023-12-20 14:48:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364058 states to 364058 states and 638359 transitions. [2023-12-20 14:48:56,821 INFO L78 Accepts]: Start accepts. Automaton has 364058 states and 638359 transitions. Word has length 172 [2023-12-20 14:48:56,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 14:48:56,821 INFO L495 AbstractCegarLoop]: Abstraction has 364058 states and 638359 transitions. [2023-12-20 14:48:56,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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 14:48:56,840 INFO L276 IsEmpty]: Start isEmpty. Operand 364058 states and 638359 transitions. [2023-12-20 14:48:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-20 14:48:56,998 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 14:48:56,999 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, 1, 1, 1, 1, 1, 1, 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 14:48:56,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-20 14:48:56,999 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 14:48:56,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 14:48:56,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1034997750, now seen corresponding path program 1 times [2023-12-20 14:48:56,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 14:48:56,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424696531] [2023-12-20 14:48:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 14:48:57,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 14:48:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:48:57,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-20 14:48:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:48:57,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-20 14:48:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:48:57,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-12-20 14:48:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:48:57,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-12-20 14:48:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:48:57,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2023-12-20 14:48:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 14:48:57,249 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 14:48:57,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 14:48:57,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424696531] [2023-12-20 14:48:57,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424696531] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 14:48:57,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 14:48:57,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-20 14:48:57,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762687475] [2023-12-20 14:48:57,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 14:48:57,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 14:48:57,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 14:48:57,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 14:48:57,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-20 14:48:57,250 INFO L87 Difference]: Start difference. First operand 364058 states and 638359 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 5 states have internal predecessors, (161), 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)